1894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===-- TargetLowering.cpp - Implement the TargetLowering class -----------===// 2894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 3894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// The LLVM Compiler Infrastructure 4894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 5894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// This file is distributed under the University of Illinois Open Source 6894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// License. See LICENSE.TXT for details. 7894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 8894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 9894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 10894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// This implements the TargetLowering class. 11894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// 12894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 13894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 14894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/Target/TargetLowering.h" 15894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/MC/MCAsmInfo.h" 16894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/MC/MCExpr.h" 17894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/Target/TargetData.h" 18894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/Target/TargetLoweringObjectFile.h" 19894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/Target/TargetMachine.h" 20894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/Target/TargetRegisterInfo.h" 21894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/GlobalVariable.h" 22894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/DerivedTypes.h" 23894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/CodeGen/Analysis.h" 24894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/CodeGen/MachineFrameInfo.h" 25894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/CodeGen/MachineJumpTableInfo.h" 26894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/CodeGen/MachineFunction.h" 27894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/CodeGen/SelectionDAG.h" 28894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/ADT/STLExtras.h" 2919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman#include "llvm/Support/CommandLine.h" 30894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/Support/ErrorHandling.h" 31894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman#include "llvm/Support/MathExtras.h" 3219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman#include <cctype> 33894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanusing namespace llvm; 34894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 3519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// We are in the process of implementing a new TypeLegalization action 3619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// - the promotion of vector elements. This feature is disabled by default 3719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// and only enabled using this flag. 3819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanstatic cl::opt<bool> 3919bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanAllowPromoteIntElem("promote-elements", cl::Hidden, 4019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman cl::desc("Allow promotion of integer vector element types")); 4119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 42894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumannamespace llvm { 43894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanTLSModel::Model getTLSModel(const GlobalValue *GV, Reloc::Model reloc) { 44894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool isLocal = GV->hasLocalLinkage(); 45894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool isDeclaration = GV->isDeclaration(); 46894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: what should we do for protected and internal visibility? 47894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // For variables, is internal different from hidden? 48894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool isHidden = GV->hasHiddenVisibility(); 49894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 50894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (reloc == Reloc::PIC_) { 51894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (isLocal || isHidden) 52894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLSModel::LocalDynamic; 53894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else 54894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLSModel::GeneralDynamic; 55894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { 56894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!isDeclaration || isHidden) 57894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLSModel::LocalExec; 58894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else 59894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLSModel::InitialExec; 60894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 61894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 62894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 63894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 64894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// InitLibcallNames - Set default libcall names. 65894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 66894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanstatic void InitLibcallNames(const char **Names) { 67894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SHL_I16] = "__ashlhi3"; 68894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SHL_I32] = "__ashlsi3"; 69894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SHL_I64] = "__ashldi3"; 70894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SHL_I128] = "__ashlti3"; 71894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SRL_I16] = "__lshrhi3"; 72894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SRL_I32] = "__lshrsi3"; 73894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SRL_I64] = "__lshrdi3"; 74894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SRL_I128] = "__lshrti3"; 75894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SRA_I16] = "__ashrhi3"; 76894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SRA_I32] = "__ashrsi3"; 77894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SRA_I64] = "__ashrdi3"; 78894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SRA_I128] = "__ashrti3"; 79894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::MUL_I8] = "__mulqi3"; 80894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::MUL_I16] = "__mulhi3"; 81894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::MUL_I32] = "__mulsi3"; 82894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::MUL_I64] = "__muldi3"; 83894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::MUL_I128] = "__multi3"; 8419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::MULO_I32] = "__mulosi4"; 8519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::MULO_I64] = "__mulodi4"; 8619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::MULO_I128] = "__muloti4"; 87894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SDIV_I8] = "__divqi3"; 88894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SDIV_I16] = "__divhi3"; 89894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SDIV_I32] = "__divsi3"; 90894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SDIV_I64] = "__divdi3"; 91894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SDIV_I128] = "__divti3"; 92894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UDIV_I8] = "__udivqi3"; 93894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UDIV_I16] = "__udivhi3"; 94894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UDIV_I32] = "__udivsi3"; 95894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UDIV_I64] = "__udivdi3"; 96894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UDIV_I128] = "__udivti3"; 97894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SREM_I8] = "__modqi3"; 98894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SREM_I16] = "__modhi3"; 99894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SREM_I32] = "__modsi3"; 100894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SREM_I64] = "__moddi3"; 101894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SREM_I128] = "__modti3"; 102894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UREM_I8] = "__umodqi3"; 103894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UREM_I16] = "__umodhi3"; 104894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UREM_I32] = "__umodsi3"; 105894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UREM_I64] = "__umoddi3"; 106894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UREM_I128] = "__umodti3"; 10719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 10819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // These are generally not available. 10919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::SDIVREM_I8] = 0; 11019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::SDIVREM_I16] = 0; 11119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::SDIVREM_I32] = 0; 11219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::SDIVREM_I64] = 0; 11319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::SDIVREM_I128] = 0; 11419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::UDIVREM_I8] = 0; 11519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::UDIVREM_I16] = 0; 11619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::UDIVREM_I32] = 0; 11719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::UDIVREM_I64] = 0; 11819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::UDIVREM_I128] = 0; 11919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 120894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::NEG_I32] = "__negsi2"; 121894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::NEG_I64] = "__negdi2"; 122894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::ADD_F32] = "__addsf3"; 123894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::ADD_F64] = "__adddf3"; 124894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::ADD_F80] = "__addxf3"; 125894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::ADD_PPCF128] = "__gcc_qadd"; 126894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SUB_F32] = "__subsf3"; 127894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SUB_F64] = "__subdf3"; 128894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SUB_F80] = "__subxf3"; 129894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SUB_PPCF128] = "__gcc_qsub"; 130894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::MUL_F32] = "__mulsf3"; 131894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::MUL_F64] = "__muldf3"; 132894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::MUL_F80] = "__mulxf3"; 133894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::MUL_PPCF128] = "__gcc_qmul"; 134894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::DIV_F32] = "__divsf3"; 135894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::DIV_F64] = "__divdf3"; 136894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::DIV_F80] = "__divxf3"; 137894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::DIV_PPCF128] = "__gcc_qdiv"; 138894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::REM_F32] = "fmodf"; 139894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::REM_F64] = "fmod"; 140894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::REM_F80] = "fmodl"; 141894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::REM_PPCF128] = "fmodl"; 14219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::FMA_F32] = "fmaf"; 14319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::FMA_F64] = "fma"; 14419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::FMA_F80] = "fmal"; 14519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::FMA_PPCF128] = "fmal"; 146894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::POWI_F32] = "__powisf2"; 147894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::POWI_F64] = "__powidf2"; 148894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::POWI_F80] = "__powixf2"; 149894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::POWI_PPCF128] = "__powitf2"; 150894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SQRT_F32] = "sqrtf"; 151894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SQRT_F64] = "sqrt"; 152894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SQRT_F80] = "sqrtl"; 153894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SQRT_PPCF128] = "sqrtl"; 154894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::LOG_F32] = "logf"; 155894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::LOG_F64] = "log"; 156894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::LOG_F80] = "logl"; 157894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::LOG_PPCF128] = "logl"; 158894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::LOG2_F32] = "log2f"; 159894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::LOG2_F64] = "log2"; 160894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::LOG2_F80] = "log2l"; 161894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::LOG2_PPCF128] = "log2l"; 162894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::LOG10_F32] = "log10f"; 163894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::LOG10_F64] = "log10"; 164894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::LOG10_F80] = "log10l"; 165894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::LOG10_PPCF128] = "log10l"; 166894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::EXP_F32] = "expf"; 167894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::EXP_F64] = "exp"; 168894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::EXP_F80] = "expl"; 169894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::EXP_PPCF128] = "expl"; 170894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::EXP2_F32] = "exp2f"; 171894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::EXP2_F64] = "exp2"; 172894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::EXP2_F80] = "exp2l"; 173894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::EXP2_PPCF128] = "exp2l"; 174894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SIN_F32] = "sinf"; 175894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SIN_F64] = "sin"; 176894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SIN_F80] = "sinl"; 177894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SIN_PPCF128] = "sinl"; 178894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::COS_F32] = "cosf"; 179894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::COS_F64] = "cos"; 180894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::COS_F80] = "cosl"; 181894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::COS_PPCF128] = "cosl"; 182894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::POW_F32] = "powf"; 183894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::POW_F64] = "pow"; 184894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::POW_F80] = "powl"; 185894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::POW_PPCF128] = "powl"; 186894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::CEIL_F32] = "ceilf"; 187894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::CEIL_F64] = "ceil"; 188894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::CEIL_F80] = "ceill"; 189894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::CEIL_PPCF128] = "ceill"; 190894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::TRUNC_F32] = "truncf"; 191894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::TRUNC_F64] = "trunc"; 192894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::TRUNC_F80] = "truncl"; 193894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::TRUNC_PPCF128] = "truncl"; 194894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::RINT_F32] = "rintf"; 195894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::RINT_F64] = "rint"; 196894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::RINT_F80] = "rintl"; 197894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::RINT_PPCF128] = "rintl"; 198894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::NEARBYINT_F32] = "nearbyintf"; 199894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::NEARBYINT_F64] = "nearbyint"; 200894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::NEARBYINT_F80] = "nearbyintl"; 201894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::NEARBYINT_PPCF128] = "nearbyintl"; 202894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FLOOR_F32] = "floorf"; 203894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FLOOR_F64] = "floor"; 204894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FLOOR_F80] = "floorl"; 205894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FLOOR_PPCF128] = "floorl"; 206894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::COPYSIGN_F32] = "copysignf"; 207894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::COPYSIGN_F64] = "copysign"; 208894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::COPYSIGN_F80] = "copysignl"; 209894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::COPYSIGN_PPCF128] = "copysignl"; 210894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPEXT_F32_F64] = "__extendsfdf2"; 211894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPEXT_F16_F32] = "__gnu_h2f_ieee"; 212894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPROUND_F32_F16] = "__gnu_f2h_ieee"; 213894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPROUND_F64_F32] = "__truncdfsf2"; 214894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPROUND_F80_F32] = "__truncxfsf2"; 215894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPROUND_PPCF128_F32] = "__trunctfsf2"; 216894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPROUND_F80_F64] = "__truncxfdf2"; 217894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPROUND_PPCF128_F64] = "__trunctfdf2"; 218894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F32_I8] = "__fixsfqi"; 219894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F32_I16] = "__fixsfhi"; 220894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F32_I32] = "__fixsfsi"; 221894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F32_I64] = "__fixsfdi"; 222894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F32_I128] = "__fixsfti"; 223894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F64_I8] = "__fixdfqi"; 224894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F64_I16] = "__fixdfhi"; 225894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F64_I32] = "__fixdfsi"; 226894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F64_I64] = "__fixdfdi"; 227894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F64_I128] = "__fixdfti"; 228894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F80_I32] = "__fixxfsi"; 229894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F80_I64] = "__fixxfdi"; 230894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_F80_I128] = "__fixxfti"; 231894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_PPCF128_I32] = "__fixtfsi"; 232894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_PPCF128_I64] = "__fixtfdi"; 233894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOSINT_PPCF128_I128] = "__fixtfti"; 234894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F32_I8] = "__fixunssfqi"; 235894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F32_I16] = "__fixunssfhi"; 236894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F32_I32] = "__fixunssfsi"; 237894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F32_I64] = "__fixunssfdi"; 238894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F32_I128] = "__fixunssfti"; 239894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F64_I8] = "__fixunsdfqi"; 240894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F64_I16] = "__fixunsdfhi"; 241894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F64_I32] = "__fixunsdfsi"; 242894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F64_I64] = "__fixunsdfdi"; 243894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F64_I128] = "__fixunsdfti"; 244894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F80_I32] = "__fixunsxfsi"; 245894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F80_I64] = "__fixunsxfdi"; 246894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_F80_I128] = "__fixunsxfti"; 247894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_PPCF128_I32] = "__fixunstfsi"; 248894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_PPCF128_I64] = "__fixunstfdi"; 249894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::FPTOUINT_PPCF128_I128] = "__fixunstfti"; 250894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SINTTOFP_I32_F32] = "__floatsisf"; 251894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SINTTOFP_I32_F64] = "__floatsidf"; 252894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SINTTOFP_I32_F80] = "__floatsixf"; 253894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SINTTOFP_I32_PPCF128] = "__floatsitf"; 254894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SINTTOFP_I64_F32] = "__floatdisf"; 255894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SINTTOFP_I64_F64] = "__floatdidf"; 256894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SINTTOFP_I64_F80] = "__floatdixf"; 257894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SINTTOFP_I64_PPCF128] = "__floatditf"; 258894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SINTTOFP_I128_F32] = "__floattisf"; 259894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SINTTOFP_I128_F64] = "__floattidf"; 260894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SINTTOFP_I128_F80] = "__floattixf"; 261894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SINTTOFP_I128_PPCF128] = "__floattitf"; 262894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UINTTOFP_I32_F32] = "__floatunsisf"; 263894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UINTTOFP_I32_F64] = "__floatunsidf"; 264894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UINTTOFP_I32_F80] = "__floatunsixf"; 265894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UINTTOFP_I32_PPCF128] = "__floatunsitf"; 266894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UINTTOFP_I64_F32] = "__floatundisf"; 267894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UINTTOFP_I64_F64] = "__floatundidf"; 268894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UINTTOFP_I64_F80] = "__floatundixf"; 269894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UINTTOFP_I64_PPCF128] = "__floatunditf"; 270894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UINTTOFP_I128_F32] = "__floatuntisf"; 271894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UINTTOFP_I128_F64] = "__floatuntidf"; 272894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UINTTOFP_I128_F80] = "__floatuntixf"; 273894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UINTTOFP_I128_PPCF128] = "__floatuntitf"; 274894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::OEQ_F32] = "__eqsf2"; 275894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::OEQ_F64] = "__eqdf2"; 276894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UNE_F32] = "__nesf2"; 277894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UNE_F64] = "__nedf2"; 278894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::OGE_F32] = "__gesf2"; 279894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::OGE_F64] = "__gedf2"; 280894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::OLT_F32] = "__ltsf2"; 281894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::OLT_F64] = "__ltdf2"; 282894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::OLE_F32] = "__lesf2"; 283894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::OLE_F64] = "__ledf2"; 284894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::OGT_F32] = "__gtsf2"; 285894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::OGT_F64] = "__gtdf2"; 286894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UO_F32] = "__unordsf2"; 287894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UO_F64] = "__unorddf2"; 288894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::O_F32] = "__unordsf2"; 289894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::O_F64] = "__unorddf2"; 290894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::MEMCPY] = "memcpy"; 291894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::MEMMOVE] = "memmove"; 292894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::MEMSET] = "memset"; 293894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::UNWIND_RESUME] = "_Unwind_Resume"; 294894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_1] = "__sync_val_compare_and_swap_1"; 295894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_2] = "__sync_val_compare_and_swap_2"; 296894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_4] = "__sync_val_compare_and_swap_4"; 297894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_VAL_COMPARE_AND_SWAP_8] = "__sync_val_compare_and_swap_8"; 298894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_LOCK_TEST_AND_SET_1] = "__sync_lock_test_and_set_1"; 299894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_LOCK_TEST_AND_SET_2] = "__sync_lock_test_and_set_2"; 300894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_LOCK_TEST_AND_SET_4] = "__sync_lock_test_and_set_4"; 301894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_LOCK_TEST_AND_SET_8] = "__sync_lock_test_and_set_8"; 302894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_ADD_1] = "__sync_fetch_and_add_1"; 303894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_ADD_2] = "__sync_fetch_and_add_2"; 304894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_ADD_4] = "__sync_fetch_and_add_4"; 305894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_ADD_8] = "__sync_fetch_and_add_8"; 306894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_SUB_1] = "__sync_fetch_and_sub_1"; 307894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_SUB_2] = "__sync_fetch_and_sub_2"; 308894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_SUB_4] = "__sync_fetch_and_sub_4"; 309894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_SUB_8] = "__sync_fetch_and_sub_8"; 310894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_AND_1] = "__sync_fetch_and_and_1"; 311894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_AND_2] = "__sync_fetch_and_and_2"; 312894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_AND_4] = "__sync_fetch_and_and_4"; 313894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_AND_8] = "__sync_fetch_and_and_8"; 314894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_OR_1] = "__sync_fetch_and_or_1"; 315894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_OR_2] = "__sync_fetch_and_or_2"; 316894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_OR_4] = "__sync_fetch_and_or_4"; 317894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_OR_8] = "__sync_fetch_and_or_8"; 318894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_XOR_1] = "__sync_fetch_and_xor_1"; 319894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_XOR_2] = "__sync_fetch_and_xor_2"; 32019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Names[RTLIB::SYNC_FETCH_AND_XOR_4] = "__sync_fetch_and_xor_4"; 321894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_XOR_8] = "__sync_fetch_and_xor_8"; 322894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_NAND_1] = "__sync_fetch_and_nand_1"; 323894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_NAND_2] = "__sync_fetch_and_nand_2"; 324894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_NAND_4] = "__sync_fetch_and_nand_4"; 325894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Names[RTLIB::SYNC_FETCH_AND_NAND_8] = "__sync_fetch_and_nand_8"; 326894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 327894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 328894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// InitLibcallCallingConvs - Set default libcall CallingConvs. 329894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 330894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanstatic void InitLibcallCallingConvs(CallingConv::ID *CCs) { 331894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (int i = 0; i < RTLIB::UNKNOWN_LIBCALL; ++i) { 332894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[i] = CallingConv::C; 333894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 334894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 335894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 336894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getFPEXT - Return the FPEXT_*_* value for the given types, or 337894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// UNKNOWN_LIBCALL if there is none. 338894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanRTLIB::Libcall RTLIB::getFPEXT(EVT OpVT, EVT RetVT) { 339894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (OpVT == MVT::f32) { 340894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::f64) 341894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPEXT_F32_F64; 342894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 343894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 344894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UNKNOWN_LIBCALL; 345894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 346894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 347894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getFPROUND - Return the FPROUND_*_* value for the given types, or 348894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// UNKNOWN_LIBCALL if there is none. 349894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanRTLIB::Libcall RTLIB::getFPROUND(EVT OpVT, EVT RetVT) { 350894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::f32) { 351894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (OpVT == MVT::f64) 352894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPROUND_F64_F32; 353894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (OpVT == MVT::f80) 354894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPROUND_F80_F32; 355894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (OpVT == MVT::ppcf128) 356894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPROUND_PPCF128_F32; 357894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (RetVT == MVT::f64) { 358894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (OpVT == MVT::f80) 359894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPROUND_F80_F64; 360894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (OpVT == MVT::ppcf128) 361894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPROUND_PPCF128_F64; 362894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 363894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 364894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UNKNOWN_LIBCALL; 365894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 366894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 367894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getFPTOSINT - Return the FPTOSINT_*_* value for the given types, or 368894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// UNKNOWN_LIBCALL if there is none. 369894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanRTLIB::Libcall RTLIB::getFPTOSINT(EVT OpVT, EVT RetVT) { 370894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (OpVT == MVT::f32) { 371894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i8) 372894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F32_I8; 373894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i16) 374894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F32_I16; 375894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i32) 376894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F32_I32; 377894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i64) 378894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F32_I64; 379894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i128) 380894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F32_I128; 381894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (OpVT == MVT::f64) { 382894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i8) 383894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F64_I8; 384894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i16) 385894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F64_I16; 386894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i32) 387894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F64_I32; 388894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i64) 389894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F64_I64; 390894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i128) 391894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F64_I128; 392894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (OpVT == MVT::f80) { 393894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i32) 394894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F80_I32; 395894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i64) 396894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F80_I64; 397894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i128) 398894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_F80_I128; 399894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (OpVT == MVT::ppcf128) { 400894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i32) 401894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_PPCF128_I32; 402894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i64) 403894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_PPCF128_I64; 404894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i128) 405894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOSINT_PPCF128_I128; 406894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 407894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UNKNOWN_LIBCALL; 408894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 409894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 410894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getFPTOUINT - Return the FPTOUINT_*_* value for the given types, or 411894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// UNKNOWN_LIBCALL if there is none. 412894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanRTLIB::Libcall RTLIB::getFPTOUINT(EVT OpVT, EVT RetVT) { 413894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (OpVT == MVT::f32) { 414894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i8) 415894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F32_I8; 416894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i16) 417894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F32_I16; 418894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i32) 419894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F32_I32; 420894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i64) 421894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F32_I64; 422894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i128) 423894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F32_I128; 424894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (OpVT == MVT::f64) { 425894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i8) 426894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F64_I8; 427894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i16) 428894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F64_I16; 429894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i32) 430894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F64_I32; 431894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i64) 432894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F64_I64; 433894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i128) 434894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F64_I128; 435894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (OpVT == MVT::f80) { 436894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i32) 437894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F80_I32; 438894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i64) 439894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F80_I64; 440894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i128) 441894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_F80_I128; 442894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (OpVT == MVT::ppcf128) { 443894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i32) 444894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_PPCF128_I32; 445894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i64) 446894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_PPCF128_I64; 447894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::i128) 448894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return FPTOUINT_PPCF128_I128; 449894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 450894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UNKNOWN_LIBCALL; 451894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 452894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 453894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getSINTTOFP - Return the SINTTOFP_*_* value for the given types, or 454894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// UNKNOWN_LIBCALL if there is none. 455894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanRTLIB::Libcall RTLIB::getSINTTOFP(EVT OpVT, EVT RetVT) { 456894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (OpVT == MVT::i32) { 457894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::f32) 458894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SINTTOFP_I32_F32; 459894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::f64) 460894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SINTTOFP_I32_F64; 461894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::f80) 462894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SINTTOFP_I32_F80; 463894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::ppcf128) 464894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SINTTOFP_I32_PPCF128; 465894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (OpVT == MVT::i64) { 466894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::f32) 467894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SINTTOFP_I64_F32; 468894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::f64) 469894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SINTTOFP_I64_F64; 470894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::f80) 471894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SINTTOFP_I64_F80; 472894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::ppcf128) 473894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SINTTOFP_I64_PPCF128; 474894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (OpVT == MVT::i128) { 475894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::f32) 476894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SINTTOFP_I128_F32; 477894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::f64) 478894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SINTTOFP_I128_F64; 479894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::f80) 480894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SINTTOFP_I128_F80; 481894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::ppcf128) 482894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SINTTOFP_I128_PPCF128; 483894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 484894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UNKNOWN_LIBCALL; 485894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 486894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 487894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getUINTTOFP - Return the UINTTOFP_*_* value for the given types, or 488894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// UNKNOWN_LIBCALL if there is none. 489894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanRTLIB::Libcall RTLIB::getUINTTOFP(EVT OpVT, EVT RetVT) { 490894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (OpVT == MVT::i32) { 491894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::f32) 492894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UINTTOFP_I32_F32; 493894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::f64) 494894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UINTTOFP_I32_F64; 495894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::f80) 496894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UINTTOFP_I32_F80; 497894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::ppcf128) 498894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UINTTOFP_I32_PPCF128; 499894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (OpVT == MVT::i64) { 500894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::f32) 501894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UINTTOFP_I64_F32; 502894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::f64) 503894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UINTTOFP_I64_F64; 504894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::f80) 505894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UINTTOFP_I64_F80; 506894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::ppcf128) 507894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UINTTOFP_I64_PPCF128; 508894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (OpVT == MVT::i128) { 509894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RetVT == MVT::f32) 510894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UINTTOFP_I128_F32; 511894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::f64) 512894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UINTTOFP_I128_F64; 513894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::f80) 514894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UINTTOFP_I128_F80; 515894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (RetVT == MVT::ppcf128) 516894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UINTTOFP_I128_PPCF128; 517894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 518894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return UNKNOWN_LIBCALL; 519894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 520894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 521894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// InitCmpLibcallCCs - Set default comparison libcall CC. 522894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 523894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanstatic void InitCmpLibcallCCs(ISD::CondCode *CCs) { 524894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman memset(CCs, ISD::SETCC_INVALID, sizeof(ISD::CondCode)*RTLIB::UNKNOWN_LIBCALL); 525894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::OEQ_F32] = ISD::SETEQ; 526894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::OEQ_F64] = ISD::SETEQ; 527894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::UNE_F32] = ISD::SETNE; 528894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::UNE_F64] = ISD::SETNE; 529894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::OGE_F32] = ISD::SETGE; 530894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::OGE_F64] = ISD::SETGE; 531894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::OLT_F32] = ISD::SETLT; 532894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::OLT_F64] = ISD::SETLT; 533894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::OLE_F32] = ISD::SETLE; 534894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::OLE_F64] = ISD::SETLE; 535894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::OGT_F32] = ISD::SETGT; 536894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::OGT_F64] = ISD::SETGT; 537894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::UO_F32] = ISD::SETNE; 538894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::UO_F64] = ISD::SETNE; 539894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::O_F32] = ISD::SETEQ; 540894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman CCs[RTLIB::O_F64] = ISD::SETEQ; 541894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 542894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 543894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// NOTE: The constructor takes ownership of TLOF. 54419bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanTargetLowering::TargetLowering(const TargetMachine &tm, 54519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const TargetLoweringObjectFile *tlof) 54619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman : TM(tm), TD(TM.getTargetData()), TLOF(*tlof), 54719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman mayPromoteElements(AllowPromoteIntElem) { 548894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // All operations default to being supported. 549894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman memset(OpActions, 0, sizeof(OpActions)); 550894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman memset(LoadExtActions, 0, sizeof(LoadExtActions)); 551894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman memset(TruncStoreActions, 0, sizeof(TruncStoreActions)); 552894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman memset(IndexedModeActions, 0, sizeof(IndexedModeActions)); 553894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman memset(CondCodeActions, 0, sizeof(CondCodeActions)); 554894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 555894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Set default actions for various operations. 556894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned VT = 0; VT != (unsigned)MVT::LAST_VALUETYPE; ++VT) { 557894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Default all indexed load / store to expand. 558894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned IM = (unsigned)ISD::PRE_INC; 559894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman IM != (unsigned)ISD::LAST_INDEXED_MODE; ++IM) { 560894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setIndexedLoadAction(IM, (MVT::SimpleValueType)VT, Expand); 561894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setIndexedStoreAction(IM, (MVT::SimpleValueType)VT, Expand); 562894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 56319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 564894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // These operations default to expand. 565894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::FGETSIGN, (MVT::SimpleValueType)VT, Expand); 566894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::CONCAT_VECTORS, (MVT::SimpleValueType)VT, Expand); 567894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 568894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 569894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Most targets ignore the @llvm.prefetch intrinsic. 570894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::PREFETCH, MVT::Other, Expand); 57119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 57219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // ConstantFP nodes default to expand. Targets can either change this to 573894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Legal, in which case all fp constants are legal, or use isFPImmLegal() 574894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // to optimize expansions for certain constants. 575894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::ConstantFP, MVT::f32, Expand); 576894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::ConstantFP, MVT::f64, Expand); 577894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::ConstantFP, MVT::f80, Expand); 578894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 579894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // These library functions default to expand. 580894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::FLOG , MVT::f64, Expand); 581894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::FLOG2, MVT::f64, Expand); 582894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::FLOG10,MVT::f64, Expand); 583894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::FEXP , MVT::f64, Expand); 584894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::FEXP2, MVT::f64, Expand); 585894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::FLOG , MVT::f32, Expand); 586894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::FLOG2, MVT::f32, Expand); 587894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::FLOG10,MVT::f32, Expand); 588894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::FEXP , MVT::f32, Expand); 589894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::FEXP2, MVT::f32, Expand); 590894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 591894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Default ISD::TRAP to expand (which turns it into abort). 592894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman setOperationAction(ISD::TRAP, MVT::Other, Expand); 59319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 594894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman IsLittleEndian = TD->isLittleEndian(); 59519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman PointerTy = MVT::getIntegerVT(8*TD->getPointerSize()); 596894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman memset(RegClassForVT, 0,MVT::LAST_VALUETYPE*sizeof(TargetRegisterClass*)); 597894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman memset(TargetDAGCombineArray, 0, array_lengthof(TargetDAGCombineArray)); 598894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman maxStoresPerMemset = maxStoresPerMemcpy = maxStoresPerMemmove = 8; 59919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman maxStoresPerMemsetOptSize = maxStoresPerMemcpyOptSize 60019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman = maxStoresPerMemmoveOptSize = 4; 601894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman benefitFromCodePlacementOpt = false; 602894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman UseUnderscoreSetJmp = false; 603894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman UseUnderscoreLongJmp = false; 604894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SelectIsExpensive = false; 605894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman IntDivIsCheap = false; 606894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Pow2DivIsCheap = false; 60719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman JumpIsExpensive = false; 608894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StackPointerRegisterToSaveRestore = 0; 60919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ExceptionPointerRegister = 0; 61019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ExceptionSelectorRegister = 0; 611894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman BooleanContents = UndefinedBooleanContent; 61219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman BooleanVectorContents = UndefinedBooleanContent; 613894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SchedPreferenceInfo = Sched::Latency; 614894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman JumpBufSize = 0; 615894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman JumpBufAlignment = 0; 61619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MinFunctionAlignment = 0; 61719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman PrefFunctionAlignment = 0; 618894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman PrefLoopAlignment = 0; 619894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MinStackArgumentAlignment = 1; 620894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ShouldFoldAtomicFences = false; 62119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman InsertFencesForAtomic = false; 622894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 623894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman InitLibcallNames(LibcallRoutineNames); 624894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman InitCmpLibcallCCs(CmpLibcallCCs); 625894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman InitLibcallCallingConvs(LibcallCallingConvs); 626894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 627894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 628894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanTargetLowering::~TargetLowering() { 62919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman delete &TLOF; 63019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 63119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 63219bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanMVT TargetLowering::getShiftAmountTy(EVT LHSTy) const { 63319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return MVT::getIntegerVT(8*TD->getPointerSize()); 634894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 635894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 636894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// canOpTrap - Returns true if the operation can trap for the value type. 637894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// VT must be a legal type. 638894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool TargetLowering::canOpTrap(unsigned Op, EVT VT) const { 639894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(isTypeLegal(VT)); 640894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (Op) { 641894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: 642894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 643894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::FDIV: 644894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::FREM: 645894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SDIV: 646894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::UDIV: 647894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SREM: 648894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::UREM: 649894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 650894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 651894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 652894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 653894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 654894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanstatic unsigned getVectorTypeBreakdownMVT(MVT VT, MVT &IntermediateVT, 655894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned &NumIntermediates, 656894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT &RegisterVT, 657894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TargetLowering *TLI) { 658894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Figure out the right, legal destination reg to copy into. 659894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned NumElts = VT.getVectorNumElements(); 660894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MVT EltTy = VT.getVectorElementType(); 66119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 662894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned NumVectorRegs = 1; 66319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 66419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // FIXME: We don't support non-power-of-2-sized vectors for now. Ideally we 665894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // could break down into LHS/RHS like LegalizeDAG does. 666894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!isPowerOf2_32(NumElts)) { 667894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumVectorRegs = NumElts; 668894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumElts = 1; 669894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 67019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 671894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Divide the input until we get to a supported size. This will always 672894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // end with a scalar if the target doesn't support vectors. 673894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman while (NumElts > 1 && !TLI->isTypeLegal(MVT::getVectorVT(EltTy, NumElts))) { 674894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumElts >>= 1; 675894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumVectorRegs <<= 1; 676894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 677894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 678894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumIntermediates = NumVectorRegs; 67919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 680894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MVT NewVT = MVT::getVectorVT(EltTy, NumElts); 681894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!TLI->isTypeLegal(NewVT)) 682894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NewVT = EltTy; 683894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman IntermediateVT = NewVT; 684894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 68519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned NewVTSize = NewVT.getSizeInBits(); 68619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 68719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Convert sizes such as i33 to i64. 68819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!isPowerOf2_32(NewVTSize)) 68919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman NewVTSize = NextPowerOf2(NewVTSize); 69019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 691894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT DestVT = TLI->getRegisterType(NewVT); 692894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RegisterVT = DestVT; 693894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (EVT(DestVT).bitsLT(NewVT)) // Value is expanded, e.g. i64 -> i16. 69419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return NumVectorRegs*(NewVTSize/DestVT.getSizeInBits()); 69519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 696894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise, promotion or legal types use the same number of registers as 697894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // the vector decimated to the appropriate level. 698894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return NumVectorRegs; 699894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 700894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 701894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// isLegalRC - Return true if the value types that can be represented by the 702894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// specified register class are all legal. 703894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool TargetLowering::isLegalRC(const TargetRegisterClass *RC) const { 704894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (TargetRegisterClass::vt_iterator I = RC->vt_begin(), E = RC->vt_end(); 705894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman I != E; ++I) { 706894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (isTypeLegal(*I)) 707894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 708894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 709894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 710894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 711894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 712894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// hasLegalSuperRegRegClasses - Return true if the specified register class 713894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// has one or more super-reg register classes that are legal. 714894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool 715894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanTargetLowering::hasLegalSuperRegRegClasses(const TargetRegisterClass *RC) const{ 716894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (*RC->superregclasses_begin() == 0) 717894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 718894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (TargetRegisterInfo::regclass_iterator I = RC->superregclasses_begin(), 719894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman E = RC->superregclasses_end(); I != E; ++I) { 720894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const TargetRegisterClass *RRC = *I; 721894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (isLegalRC(RRC)) 722894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 723894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 724894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 725894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 726894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 727894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// findRepresentativeClass - Return the largest legal super-reg register class 728894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// of the register class for the specified type and its associated "cost". 729894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanstd::pair<const TargetRegisterClass*, uint8_t> 730894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanTargetLowering::findRepresentativeClass(EVT VT) const { 731894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const TargetRegisterClass *RC = RegClassForVT[VT.getSimpleVT().SimpleTy]; 732894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!RC) 733894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return std::make_pair(RC, 0); 734894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const TargetRegisterClass *BestRC = RC; 735894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (TargetRegisterInfo::regclass_iterator I = RC->superregclasses_begin(), 736894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman E = RC->superregclasses_end(); I != E; ++I) { 737894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const TargetRegisterClass *RRC = *I; 738894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RRC->isASubClass() || !isLegalRC(RRC)) 739894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman continue; 740894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!hasLegalSuperRegRegClasses(RRC)) 741894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return std::make_pair(RRC, 1); 742894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman BestRC = RRC; 743894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 744894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return std::make_pair(BestRC, 1); 745894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 746894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 74719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 748894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// computeRegisterProperties - Once all of the register classes are added, 749894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// this allows us to compute derived properties we expose. 750894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanvoid TargetLowering::computeRegisterProperties() { 751894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(MVT::LAST_VALUETYPE <= MVT::MAX_ALLOWED_VALUETYPE && 752894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "Too many value types for ValueTypeActions to hold!"); 753894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 754894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Everything defaults to needing one register. 755894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned i = 0; i != MVT::LAST_VALUETYPE; ++i) { 756894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumRegistersForVT[i] = 1; 757894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RegisterTypeForVT[i] = TransformToType[i] = (MVT::SimpleValueType)i; 758894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 759894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // ...except isVoid, which doesn't need any registers. 760894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumRegistersForVT[MVT::isVoid] = 0; 761894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 762894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Find the largest integer register class. 763894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned LargestIntReg = MVT::LAST_INTEGER_VALUETYPE; 764894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (; RegClassForVT[LargestIntReg] == 0; --LargestIntReg) 765894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(LargestIntReg != MVT::i1 && "No integer registers defined!"); 766894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 767894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Every integer value type larger than this largest register takes twice as 768894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // many registers to represent as the previous ValueType. 769894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned ExpandedReg = LargestIntReg + 1; ; ++ExpandedReg) { 770894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT ExpandedVT = (MVT::SimpleValueType)ExpandedReg; 771894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!ExpandedVT.isInteger()) 772894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 773894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumRegistersForVT[ExpandedReg] = 2*NumRegistersForVT[ExpandedReg-1]; 774894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RegisterTypeForVT[ExpandedReg] = (MVT::SimpleValueType)LargestIntReg; 775894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TransformToType[ExpandedReg] = (MVT::SimpleValueType)(ExpandedReg - 1); 77619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ValueTypeActions.setTypeAction(ExpandedVT, TypeExpandInteger); 777894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 778894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 779894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Inspect all of the ValueType's smaller than the largest integer 780894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // register to see which ones need promotion. 781894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned LegalIntReg = LargestIntReg; 782894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned IntReg = LargestIntReg - 1; 783894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman IntReg >= (unsigned)MVT::i1; --IntReg) { 784894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT IVT = (MVT::SimpleValueType)IntReg; 785894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (isTypeLegal(IVT)) { 786894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman LegalIntReg = IntReg; 787894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { 788894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RegisterTypeForVT[IntReg] = TransformToType[IntReg] = 789894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (MVT::SimpleValueType)LegalIntReg; 79019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ValueTypeActions.setTypeAction(IVT, TypePromoteInteger); 791894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 792894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 793894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 794894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // ppcf128 type is really two f64's. 795894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!isTypeLegal(MVT::ppcf128)) { 796894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumRegistersForVT[MVT::ppcf128] = 2*NumRegistersForVT[MVT::f64]; 797894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RegisterTypeForVT[MVT::ppcf128] = MVT::f64; 798894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TransformToType[MVT::ppcf128] = MVT::f64; 79919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ValueTypeActions.setTypeAction(MVT::ppcf128, TypeExpandFloat); 80019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 801894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 802894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Decide how to handle f64. If the target does not have native f64 support, 803894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // expand it to i64 and we will be generating soft float library calls. 804894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!isTypeLegal(MVT::f64)) { 805894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumRegistersForVT[MVT::f64] = NumRegistersForVT[MVT::i64]; 806894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RegisterTypeForVT[MVT::f64] = RegisterTypeForVT[MVT::i64]; 807894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TransformToType[MVT::f64] = MVT::i64; 80819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ValueTypeActions.setTypeAction(MVT::f64, TypeSoftenFloat); 809894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 810894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 811894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Decide how to handle f32. If the target does not have native support for 812894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // f32, promote it to f64 if it is legal. Otherwise, expand it to i32. 813894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!isTypeLegal(MVT::f32)) { 814894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (isTypeLegal(MVT::f64)) { 815894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumRegistersForVT[MVT::f32] = NumRegistersForVT[MVT::f64]; 816894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RegisterTypeForVT[MVT::f32] = RegisterTypeForVT[MVT::f64]; 817894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TransformToType[MVT::f32] = MVT::f64; 81819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ValueTypeActions.setTypeAction(MVT::f32, TypePromoteInteger); 819894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { 820894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumRegistersForVT[MVT::f32] = NumRegistersForVT[MVT::i32]; 821894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RegisterTypeForVT[MVT::f32] = RegisterTypeForVT[MVT::i32]; 822894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TransformToType[MVT::f32] = MVT::i32; 82319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ValueTypeActions.setTypeAction(MVT::f32, TypeSoftenFloat); 824894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 825894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 82619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 827894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Loop over all of the vector value types to see which need transformations. 828894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned i = MVT::FIRST_VECTOR_VALUETYPE; 829894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman i <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++i) { 830894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MVT VT = (MVT::SimpleValueType)i; 831894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (isTypeLegal(VT)) continue; 83219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 83319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Determine if there is a legal wider type. If so, we should promote to 83419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // that wider vector type. 83519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EVT EltVT = VT.getVectorElementType(); 83619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned NElts = VT.getVectorNumElements(); 83719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (NElts != 1) { 83819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool IsLegalWiderType = false; 83919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If we allow the promotion of vector elements using a flag, 84019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // then return TypePromoteInteger on vector elements. 84119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // First try to promote the elements of integer vectors. If no legal 84219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // promotion was found, fallback to the widen-vector method. 84319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (mayPromoteElements) 84419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (unsigned nVT = i+1; nVT <= MVT::LAST_VECTOR_VALUETYPE; ++nVT) { 84519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EVT SVT = (MVT::SimpleValueType)nVT; 84619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Promote vectors of integers to vectors with the same number 84719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // of elements, with a wider element type. 84819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (SVT.getVectorElementType().getSizeInBits() > EltVT.getSizeInBits() 84919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman && SVT.getVectorNumElements() == NElts && 85019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman isTypeLegal(SVT) && SVT.getScalarType().isInteger()) { 85119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TransformToType[i] = SVT; 85219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman RegisterTypeForVT[i] = SVT; 85319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman NumRegistersForVT[i] = 1; 85419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ValueTypeActions.setTypeAction(VT, TypePromoteInteger); 85519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman IsLegalWiderType = true; 85619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 85719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 85819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 85919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 86019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IsLegalWiderType) continue; 86119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 86219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Try to widen the vector. 86319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (unsigned nVT = i+1; nVT <= MVT::LAST_VECTOR_VALUETYPE; ++nVT) { 86419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EVT SVT = (MVT::SimpleValueType)nVT; 86519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (SVT.getVectorElementType() == EltVT && 86619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SVT.getVectorNumElements() > NElts && 86719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman isTypeLegal(SVT)) { 86819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TransformToType[i] = SVT; 86919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman RegisterTypeForVT[i] = SVT; 87019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman NumRegistersForVT[i] = 1; 87119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ValueTypeActions.setTypeAction(VT, TypeWidenVector); 87219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman IsLegalWiderType = true; 87319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 87419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 87519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 87619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (IsLegalWiderType) continue; 87719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 87819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 879894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MVT IntermediateVT; 880894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT RegisterVT; 881894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned NumIntermediates; 882894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumRegistersForVT[i] = 883894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getVectorTypeBreakdownMVT(VT, IntermediateVT, NumIntermediates, 884894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RegisterVT, this); 885894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RegisterTypeForVT[i] = RegisterVT; 88619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 88719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EVT NVT = VT.getPow2VectorType(); 88819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (NVT == VT) { 88919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Type is already a power of 2. The default action is to split. 89019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TransformToType[i] = MVT::Other; 89119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned NumElts = VT.getVectorNumElements(); 89219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ValueTypeActions.setTypeAction(VT, 89319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman NumElts > 1 ? TypeSplitVector : TypeScalarizeVector); 89419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else { 89519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TransformToType[i] = NVT; 89619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ValueTypeActions.setTypeAction(VT, TypeWidenVector); 897894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 898894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 899894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 900894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Determine the 'representative' register class for each value type. 901894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // An representative register class is the largest (meaning one which is 902894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // not a sub-register class / subreg register class) legal register class for 903894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // a group of value types. For example, on i386, i8, i16, and i32 904894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // representative would be GR32; while on x86_64 it's GR64. 905894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned i = 0; i != MVT::LAST_VALUETYPE; ++i) { 906894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const TargetRegisterClass* RRC; 907894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman uint8_t Cost; 908894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman tie(RRC, Cost) = findRepresentativeClass((MVT::SimpleValueType)i); 909894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RepRegClassForVT[i] = RRC; 910894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RepRegClassCostForVT[i] = Cost; 911894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 912894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 913894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 914894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanconst char *TargetLowering::getTargetNodeName(unsigned Opcode) const { 915894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return NULL; 916894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 917894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 918894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 91919bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanEVT TargetLowering::getSetCCResultType(EVT VT) const { 92019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert(!VT.isVector() && "No default SetCC type for vectors!"); 921894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return PointerTy.SimpleTy; 922894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 923894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 924894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanMVT::SimpleValueType TargetLowering::getCmpLibcallReturnType() const { 925894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return MVT::i32; // return the default value 926894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 927894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 928894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getVectorTypeBreakdown - Vector types are broken down into some number of 929894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// legal first class types. For example, MVT::v8f32 maps to 2 MVT::v4f32 930894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// with Altivec or SSE1, or 8 promoted MVT::f64 values with the X86 FP stack. 931894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// Similarly, MVT::v2i64 turns into 4 MVT::i32 values with both PPC and X86. 932894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 933894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// This method returns the number of registers needed, and the VT for each 934894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// register. It also returns the VT and quantity of the intermediate values 935894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// before they are promoted/expanded. 936894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 937894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanunsigned TargetLowering::getVectorTypeBreakdown(LLVMContext &Context, EVT VT, 938894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT &IntermediateVT, 939894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned &NumIntermediates, 940894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT &RegisterVT) const { 941894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned NumElts = VT.getVectorNumElements(); 94219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 94319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If there is a wider vector type with the same element type as this one, 94419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // we should widen to that legal vector type. This handles things like 94519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // <2 x float> -> <4 x float>. 94619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (NumElts != 1 && getTypeAction(Context, VT) == TypeWidenVector) { 94719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman RegisterVT = getTypeToTransformTo(Context, VT); 94819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (isTypeLegal(RegisterVT)) { 94919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman IntermediateVT = RegisterVT; 95019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman NumIntermediates = 1; 95119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return 1; 95219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 95319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 95419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 95519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Figure out the right, legal destination reg to copy into. 956894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT EltTy = VT.getVectorElementType(); 95719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 958894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned NumVectorRegs = 1; 95919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 96019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // FIXME: We don't support non-power-of-2-sized vectors for now. Ideally we 961894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // could break down into LHS/RHS like LegalizeDAG does. 962894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!isPowerOf2_32(NumElts)) { 963894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumVectorRegs = NumElts; 964894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumElts = 1; 965894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 96619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 967894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Divide the input until we get to a supported size. This will always 968894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // end with a scalar if the target doesn't support vectors. 969894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman while (NumElts > 1 && !isTypeLegal( 970894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT::getVectorVT(Context, EltTy, NumElts))) { 971894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumElts >>= 1; 972894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumVectorRegs <<= 1; 973894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 974894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 975894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NumIntermediates = NumVectorRegs; 97619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 977894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT NewVT = EVT::getVectorVT(Context, EltTy, NumElts); 978894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!isTypeLegal(NewVT)) 979894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NewVT = EltTy; 980894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman IntermediateVT = NewVT; 981894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 982894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT DestVT = getRegisterType(Context, NewVT); 983894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RegisterVT = DestVT; 98419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned NewVTSize = NewVT.getSizeInBits(); 98519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 98619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Convert sizes such as i33 to i64. 98719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!isPowerOf2_32(NewVTSize)) 98819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman NewVTSize = NextPowerOf2(NewVTSize); 98919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 99019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (DestVT.bitsLT(NewVT)) // Value is expanded, e.g. i64 -> i16. 99119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return NumVectorRegs*(NewVTSize/DestVT.getSizeInBits()); 99219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 99319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Otherwise, promotion or legal types use the same number of registers as 99419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // the vector decimated to the appropriate level. 99519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return NumVectorRegs; 996894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 997894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 99819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// Get the EVTs and ArgFlags collections that represent the legalized return 999894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// type of the given function. This does not require a DAG or a return value, 1000894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// and is suitable for use before any DAGs for the function are constructed. 1001894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// TODO: Move this out of TargetLowering.cpp. 100219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanvoid llvm::GetReturnInfo(Type* ReturnType, Attributes attr, 1003894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SmallVectorImpl<ISD::OutputArg> &Outs, 1004894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const TargetLowering &TLI, 1005894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SmallVectorImpl<uint64_t> *Offsets) { 1006894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SmallVector<EVT, 4> ValueVTs; 1007894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ComputeValueVTs(TLI, ReturnType, ValueVTs); 1008894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned NumValues = ValueVTs.size(); 1009894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (NumValues == 0) return; 1010894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned Offset = 0; 1011894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1012894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned j = 0, f = NumValues; j != f; ++j) { 1013894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT VT = ValueVTs[j]; 1014894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ISD::NodeType ExtendKind = ISD::ANY_EXTEND; 1015894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1016894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (attr & Attribute::SExt) 1017894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ExtendKind = ISD::SIGN_EXTEND; 1018894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (attr & Attribute::ZExt) 1019894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ExtendKind = ISD::ZERO_EXTEND; 1020894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1021894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: C calling convention requires the return type to be promoted to 1022894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // at least 32-bit. But this is not necessary for non-C calling 1023894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // conventions. The frontend should mark functions whose return values 1024894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // require promoting with signext or zeroext attributes. 1025894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ExtendKind != ISD::ANY_EXTEND && VT.isInteger()) { 1026894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT MinVT = TLI.getRegisterType(ReturnType->getContext(), MVT::i32); 1027894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (VT.bitsLT(MinVT)) 1028894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman VT = MinVT; 1029894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1030894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1031894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned NumParts = TLI.getNumRegisters(ReturnType->getContext(), VT); 1032894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT PartVT = TLI.getRegisterType(ReturnType->getContext(), VT); 1033894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned PartSize = TLI.getTargetData()->getTypeAllocSize( 1034894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman PartVT.getTypeForEVT(ReturnType->getContext())); 1035894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1036894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // 'inreg' on function refers to return value 1037894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ISD::ArgFlagsTy Flags = ISD::ArgFlagsTy(); 1038894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (attr & Attribute::InReg) 1039894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Flags.setInReg(); 1040894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1041894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Propagate extension type if any 1042894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (attr & Attribute::SExt) 1043894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Flags.setSExt(); 1044894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (attr & Attribute::ZExt) 1045894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Flags.setZExt(); 1046894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1047894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned i = 0; i < NumParts; ++i) { 1048894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Outs.push_back(ISD::OutputArg(Flags, PartVT, /*isFixed=*/true)); 1049894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Offsets) { 1050894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Offsets->push_back(Offset); 1051894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Offset += PartSize; 1052894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1053894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1054894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1055894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1056894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1057894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getByValTypeAlignment - Return the desired alignment for ByVal aggregate 1058894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// function arguments in the caller parameter area. This is the actual 1059894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// alignment, not its logarithm. 106019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanunsigned TargetLowering::getByValTypeAlignment(Type *Ty) const { 1061894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TD->getCallFrameTypeAlignment(Ty); 1062894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1063894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1064894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getJumpTableEncoding - Return the entry encoding for a jump table in the 1065894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// current function. The returned value is a member of the 1066894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// MachineJumpTableInfo::JTEntryKind enum. 1067894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanunsigned TargetLowering::getJumpTableEncoding() const { 1068894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // In non-pic modes, just use the address of a block. 1069894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getTargetMachine().getRelocationModel() != Reloc::PIC_) 1070894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return MachineJumpTableInfo::EK_BlockAddress; 107119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1072894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // In PIC mode, if the target supports a GPRel32 directive, use it. 1073894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getTargetMachine().getMCAsmInfo()->getGPRel32Directive() != 0) 1074894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return MachineJumpTableInfo::EK_GPRel32BlockAddress; 107519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1076894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise, use a label difference. 1077894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return MachineJumpTableInfo::EK_LabelDifference32; 1078894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1079894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1080894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanSDValue TargetLowering::getPICJumpTableRelocBase(SDValue Table, 1081894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SelectionDAG &DAG) const { 1082894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If our PIC model is GP relative, use the global offset table as the base. 1083894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getJumpTableEncoding() == MachineJumpTableInfo::EK_GPRel32BlockAddress) 1084894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getGLOBAL_OFFSET_TABLE(getPointerTy()); 1085894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return Table; 1086894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1087894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1088894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getPICJumpTableRelocBaseExpr - This returns the relocation base for the 1089894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// given PIC jumptable, the same as getPICJumpTableRelocBase, but as an 1090894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// MCExpr. 1091894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanconst MCExpr * 1092894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanTargetLowering::getPICJumpTableRelocBaseExpr(const MachineFunction *MF, 1093894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned JTI,MCContext &Ctx) const{ 1094894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // The normal PIC reloc base is the label at the start of the jump table. 1095894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return MCSymbolRefExpr::Create(MF->getJTISymbol(JTI, Ctx), Ctx); 1096894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1097894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1098894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool 1099894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const { 1100894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Assume that everything is safe in static mode. 1101894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getTargetMachine().getRelocationModel() == Reloc::Static) 1102894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1103894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1104894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // In dynamic-no-pic mode, assume that known defined values are safe. 1105894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (getTargetMachine().getRelocationModel() == Reloc::DynamicNoPIC && 1106894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman GA && 1107894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman !GA->getGlobal()->isDeclaration() && 1108894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman !GA->getGlobal()->isWeakForLinker()) 1109894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1110894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1111894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise assume nothing is safe. 1112894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1113894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1114894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1115894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 1116894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// Optimization Methods 1117894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 1118894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 111919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ShrinkDemandedConstant - Check to see if the specified operand of the 1120894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// specified instruction is a constant integer. If so, check to see if there 1121894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// are any bits set in the constant that are not demanded. If so, shrink the 1122894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// constant and return true. 112319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool TargetLowering::TargetLoweringOpt::ShrinkDemandedConstant(SDValue Op, 1124894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const APInt &Demanded) { 1125894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DebugLoc dl = Op.getDebugLoc(); 1126894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1127894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: ISD::SELECT, ISD::SELECT_CC 1128894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (Op.getOpcode()) { 1129894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: break; 1130894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::XOR: 1131894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::AND: 1132894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::OR: { 1133894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1)); 1134894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!C) return false; 1135894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1136894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Op.getOpcode() == ISD::XOR && 1137894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (C->getAPIntValue() | (~Demanded)).isAllOnesValue()) 1138894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1139894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1140894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // if we can expand it to have all bits set, do it 1141894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (C->getAPIntValue().intersects(~Demanded)) { 1142894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT VT = Op.getValueType(); 1143894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue New = DAG.getNode(Op.getOpcode(), dl, VT, Op.getOperand(0), 1144894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(Demanded & 114519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman C->getAPIntValue(), 1146894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman VT)); 1147894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return CombineTo(Op, New); 1148894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1149894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1150894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1151894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1152894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1153894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1154894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1155894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1156894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1157894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ShrinkDemandedOp - Convert x+y to (VT)((SmallVT)x+(SmallVT)y) if the 1158894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// casts are free. This uses isZExtFree and ZERO_EXTEND for the widening 1159894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// cast, but it could be generalized for targets with other types of 1160894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// implicit widening casts. 1161894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool 1162894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanTargetLowering::TargetLoweringOpt::ShrinkDemandedOp(SDValue Op, 1163894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned BitWidth, 1164894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const APInt &Demanded, 1165894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DebugLoc dl) { 1166894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(Op.getNumOperands() == 2 && 1167894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "ShrinkDemandedOp only supports binary operators!"); 1168894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(Op.getNode()->getNumValues() == 1 && 1169894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "ShrinkDemandedOp only supports nodes with one result!"); 1170894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1171894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Don't do this if the node has another user, which may require the 1172894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // full value. 1173894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!Op.getNode()->hasOneUse()) 1174894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1175894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1176894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Search for the smallest integer type with free casts to and from 1177894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Op's type. For expedience, just check power-of-2 integer types. 1178894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const TargetLowering &TLI = DAG.getTargetLoweringInfo(); 1179894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned SmallVTBits = BitWidth - Demanded.countLeadingZeros(); 1180894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!isPowerOf2_32(SmallVTBits)) 1181894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SmallVTBits = NextPowerOf2(SmallVTBits); 1182894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (; SmallVTBits < BitWidth; SmallVTBits = NextPowerOf2(SmallVTBits)) { 1183894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT SmallVT = EVT::getIntegerVT(*DAG.getContext(), SmallVTBits); 1184894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TLI.isTruncateFree(Op.getValueType(), SmallVT) && 1185894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLI.isZExtFree(SmallVT, Op.getValueType())) { 1186894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // We found a type with free casts. 1187894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue X = DAG.getNode(Op.getOpcode(), dl, SmallVT, 1188894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getNode(ISD::TRUNCATE, dl, SmallVT, 1189894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getNode()->getOperand(0)), 1190894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getNode(ISD::TRUNCATE, dl, SmallVT, 1191894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getNode()->getOperand(1))); 1192894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue Z = DAG.getNode(ISD::ZERO_EXTEND, dl, Op.getValueType(), X); 1193894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return CombineTo(Op, Z); 1194894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1195894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1196894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1197894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1198894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1199894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// SimplifyDemandedBits - Look at Op. At this point, we know that only the 1200894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// DemandedMask bits of the result of Op are ever used downstream. If we can 1201894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// use this information to simplify Op, create a new simplified DAG node and 1202894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// return true, returning the original and new nodes in Old and New. Otherwise, 1203894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// analyze the expression and return a mask of KnownOne and KnownZero bits for 1204894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// the expression (used to simplify the caller). The KnownZero/One bits may 1205894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// only be accurate for those bits in the DemandedMask. 1206894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool TargetLowering::SimplifyDemandedBits(SDValue Op, 1207894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const APInt &DemandedMask, 1208894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt &KnownZero, 1209894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt &KnownOne, 1210894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TargetLoweringOpt &TLO, 1211894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned Depth) const { 1212894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned BitWidth = DemandedMask.getBitWidth(); 1213894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(Op.getValueType().getScalarType().getSizeInBits() == BitWidth && 1214894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "Mask size mismatches value type size!"); 1215894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt NewMask = DemandedMask; 1216894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DebugLoc dl = Op.getDebugLoc(); 1217894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1218894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Don't know anything. 1219894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero = KnownOne = APInt(BitWidth, 0); 1220894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1221894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Other users may use these bits. 122219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!Op.getNode()->hasOneUse()) { 1223894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Depth != 0) { 122419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If not at the root, Just compute the KnownZero/KnownOne bits to 1225894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // simplify things downstream. 1226894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLO.DAG.ComputeMaskedBits(Op, DemandedMask, KnownZero, KnownOne, Depth); 1227894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1228894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1229894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If this is the root being simplified, allow it to have multiple uses, 1230894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // just set the NewMask to all bits. 1231894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NewMask = APInt::getAllOnesValue(BitWidth); 123219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else if (DemandedMask == 0) { 1233894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Not demanding any bits from Op. 1234894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Op.getOpcode() != ISD::UNDEF) 1235894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, TLO.DAG.getUNDEF(Op.getValueType())); 1236894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1237894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (Depth == 6) { // Limit search depth. 1238894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1239894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1240894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1241894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt KnownZero2, KnownOne2, KnownZeroOut, KnownOneOut; 1242894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (Op.getOpcode()) { 1243894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::Constant: 1244894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // We know all of the bits for a constant! 1245894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne = cast<ConstantSDNode>(Op)->getAPIntValue() & NewMask; 1246894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero = ~KnownOne & NewMask; 1247894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; // Don't fall through, will infinitely loop. 1248894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::AND: 1249894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the RHS is a constant, check to see if the LHS would be zero without 1250894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // using the bits from the RHS. Below, we use knowledge about the RHS to 1251894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // simplify the LHS, here we're using information from the LHS to simplify 1252894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // the RHS. 1253894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(Op.getOperand(1))) { 1254894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt LHSZero, LHSOne; 125519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Do not increment Depth here; that can cause an infinite loop. 1256894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLO.DAG.ComputeMaskedBits(Op.getOperand(0), NewMask, 125719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman LHSZero, LHSOne, Depth); 1258894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the LHS already has zeros where RHSC does, this and is dead. 1259894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((LHSZero & NewMask) == (~RHSC->getAPIntValue() & NewMask)) 1260894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, Op.getOperand(0)); 1261894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If any of the set bits in the RHS are known zero on the LHS, shrink 1262894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // the constant. 1263894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TLO.ShrinkDemandedConstant(Op, ~LHSZero & NewMask)) 1264894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1265894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 126619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1267894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(1), NewMask, KnownZero, 1268894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne, TLO, Depth+1)) 1269894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 127019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 1271894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(0), ~KnownZero & NewMask, 1272894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero2, KnownOne2, TLO, Depth+1)) 1273894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 127419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?"); 127519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1276894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If all of the demanded bits are known one on one side, return the other. 1277894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // These bits cannot contribute to the result of the 'and'. 1278894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((NewMask & ~KnownZero2 & KnownOne) == (~KnownZero2 & NewMask)) 1279894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, Op.getOperand(0)); 1280894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((NewMask & ~KnownZero & KnownOne2) == (~KnownZero & NewMask)) 1281894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, Op.getOperand(1)); 1282894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If all of the demanded bits in the inputs are known zeros, return zero. 1283894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((NewMask & (KnownZero|KnownZero2)) == NewMask) 1284894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, TLO.DAG.getConstant(0, Op.getValueType())); 1285894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the RHS is a constant, see if we can simplify it. 1286894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TLO.ShrinkDemandedConstant(Op, ~KnownZero2 & NewMask)) 1287894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1288894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the operation can be done in a smaller type, do so. 1289894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TLO.ShrinkDemandedOp(Op, BitWidth, NewMask, dl)) 1290894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1291894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1292894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Output known-1 bits are only known if set in both the LHS & RHS. 1293894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne &= KnownOne2; 1294894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Output known-0 are known to be clear if zero in either the LHS | RHS. 1295894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero |= KnownZero2; 1296894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1297894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::OR: 129819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (SimplifyDemandedBits(Op.getOperand(1), NewMask, KnownZero, 1299894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne, TLO, Depth+1)) 1300894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 130119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 1302894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(0), ~KnownOne & NewMask, 1303894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero2, KnownOne2, TLO, Depth+1)) 1304894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 130519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?"); 130619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1307894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If all of the demanded bits are known zero on one side, return the other. 1308894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // These bits cannot contribute to the result of the 'or'. 1309894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((NewMask & ~KnownOne2 & KnownZero) == (~KnownOne2 & NewMask)) 1310894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, Op.getOperand(0)); 1311894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((NewMask & ~KnownOne & KnownZero2) == (~KnownOne & NewMask)) 1312894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, Op.getOperand(1)); 1313894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If all of the potentially set bits on one side are known to be set on 1314894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // the other side, just use the 'other' side. 1315894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((NewMask & ~KnownZero & KnownOne2) == (~KnownZero & NewMask)) 1316894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, Op.getOperand(0)); 1317894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((NewMask & ~KnownZero2 & KnownOne) == (~KnownZero2 & NewMask)) 1318894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, Op.getOperand(1)); 1319894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the RHS is a constant, see if we can simplify it. 1320894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TLO.ShrinkDemandedConstant(Op, NewMask)) 1321894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1322894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the operation can be done in a smaller type, do so. 1323894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TLO.ShrinkDemandedOp(Op, BitWidth, NewMask, dl)) 1324894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1325894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1326894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Output known-0 bits are only known if clear in both the LHS & RHS. 1327894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero &= KnownZero2; 1328894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Output known-1 are known to be set if set in either the LHS | RHS. 1329894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne |= KnownOne2; 1330894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1331894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::XOR: 133219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (SimplifyDemandedBits(Op.getOperand(1), NewMask, KnownZero, 1333894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne, TLO, Depth+1)) 1334894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 133519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 1336894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(0), NewMask, KnownZero2, 1337894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne2, TLO, Depth+1)) 1338894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 133919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?"); 134019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1341894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If all of the demanded bits are known zero on one side, return the other. 1342894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // These bits cannot contribute to the result of the 'xor'. 1343894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((KnownZero & NewMask) == NewMask) 1344894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, Op.getOperand(0)); 1345894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((KnownZero2 & NewMask) == NewMask) 1346894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, Op.getOperand(1)); 1347894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the operation can be done in a smaller type, do so. 1348894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TLO.ShrinkDemandedOp(Op, BitWidth, NewMask, dl)) 1349894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1350894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1351894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If all of the unknown bits are known to be zero on one side or the other 1352894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // (but not both) turn this into an *inclusive* or. 1353894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // e.g. (A & C1)^(B & C2) -> (A & C1)|(B & C2) iff C1&C2 == 0 1354894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((NewMask & ~KnownZero & ~KnownZero2) == 0) 1355894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, TLO.DAG.getNode(ISD::OR, dl, Op.getValueType(), 1356894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOperand(0), 1357894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOperand(1))); 135819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1359894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Output known-0 bits are known if clear or set in both the LHS & RHS. 1360894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZeroOut = (KnownZero & KnownZero2) | (KnownOne & KnownOne2); 1361894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Output known-1 are known to be set if set in only one of the LHS, RHS. 1362894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOneOut = (KnownZero & KnownOne2) | (KnownOne & KnownZero2); 136319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1364894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If all of the demanded bits on one side are known, and all of the set 1365894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // bits on that side are also known to be set on the other side, turn this 1366894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // into an AND, as we know the bits will be cleared. 1367894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // e.g. (X | C1) ^ C2 --> (X | C1) & ~C2 iff (C1&C2) == C2 1368894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((NewMask & (KnownZero|KnownOne)) == NewMask) { // all known 1369894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((KnownOne & KnownOne2) == KnownOne) { 1370894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT VT = Op.getValueType(); 1371894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue ANDC = TLO.DAG.getConstant(~KnownOne & NewMask, VT); 137219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TLO.CombineTo(Op, TLO.DAG.getNode(ISD::AND, dl, VT, 1373894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOperand(0), ANDC)); 1374894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1375894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 137619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1377894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the RHS is a constant, see if we can simplify it. 1378894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // for XOR, we prefer to force bits to 1 if they will make a -1. 1379894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // if we can't force bits, try to shrink constant 1380894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op.getOperand(1))) { 1381894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt Expanded = C->getAPIntValue() | (~NewMask); 1382894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // if we can expand it to have all bits set, do it 1383894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Expanded.isAllOnesValue()) { 1384894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Expanded != C->getAPIntValue()) { 1385894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT VT = Op.getValueType(); 1386894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue New = TLO.DAG.getNode(Op.getOpcode(), dl,VT, Op.getOperand(0), 1387894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLO.DAG.getConstant(Expanded, VT)); 1388894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, New); 1389894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1390894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // if it already has all the bits set, nothing to change 1391894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // but don't shrink either! 1392894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (TLO.ShrinkDemandedConstant(Op, NewMask)) { 1393894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1394894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1395894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1396894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1397894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero = KnownZeroOut; 1398894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne = KnownOneOut; 1399894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1400894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SELECT: 140119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (SimplifyDemandedBits(Op.getOperand(2), NewMask, KnownZero, 1402894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne, TLO, Depth+1)) 1403894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1404894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(1), NewMask, KnownZero2, 1405894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne2, TLO, Depth+1)) 1406894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 140719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 140819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?"); 140919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1410894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the operands are constants, see if we can simplify them. 1411894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TLO.ShrinkDemandedConstant(Op, NewMask)) 1412894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 141319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1414894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Only known if known in both the LHS and RHS. 1415894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne &= KnownOne2; 1416894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero &= KnownZero2; 1417894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1418894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SELECT_CC: 141919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (SimplifyDemandedBits(Op.getOperand(3), NewMask, KnownZero, 1420894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne, TLO, Depth+1)) 1421894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1422894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(2), NewMask, KnownZero2, 1423894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne2, TLO, Depth+1)) 1424894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 142519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 142619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero2 & KnownOne2) == 0 && "Bits known to be one AND zero?"); 142719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1428894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the operands are constants, see if we can simplify them. 1429894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TLO.ShrinkDemandedConstant(Op, NewMask)) 1430894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 143119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1432894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Only known if known in both the LHS and RHS. 1433894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne &= KnownOne2; 1434894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero &= KnownZero2; 1435894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1436894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SHL: 1437894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstantSDNode *SA = dyn_cast<ConstantSDNode>(Op.getOperand(1))) { 1438894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned ShAmt = SA->getZExtValue(); 1439894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue InOp = Op.getOperand(0); 1440894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1441894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the shift count is an invalid immediate, don't do anything. 1442894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ShAmt >= BitWidth) 1443894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1444894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1445894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If this is ((X >>u C1) << ShAmt), see if we can simplify this into a 1446894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // single shift. We can do this if the bottom bits (which are shifted 1447894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // out) are never demanded. 1448894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (InOp.getOpcode() == ISD::SRL && 1449894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isa<ConstantSDNode>(InOp.getOperand(1))) { 1450894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ShAmt && (NewMask & APInt::getLowBitsSet(BitWidth, ShAmt)) == 0) { 1451894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned C1= cast<ConstantSDNode>(InOp.getOperand(1))->getZExtValue(); 1452894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned Opc = ISD::SHL; 1453894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int Diff = ShAmt-C1; 1454894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Diff < 0) { 1455894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Diff = -Diff; 1456894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Opc = ISD::SRL; 145719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 145819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 145919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue NewSA = 1460894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLO.DAG.getConstant(Diff, Op.getOperand(1).getValueType()); 1461894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT VT = Op.getValueType(); 1462894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, TLO.DAG.getNode(Opc, dl, VT, 1463894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman InOp.getOperand(0), NewSA)); 1464894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 146519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 146619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1467894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(InOp, NewMask.lshr(ShAmt), 1468894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero, KnownOne, TLO, Depth+1)) 1469894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1470894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1471894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Convert (shl (anyext x, c)) to (anyext (shl x, c)) if the high bits 1472894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // are not demanded. This will likely allow the anyext to be folded away. 1473894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (InOp.getNode()->getOpcode() == ISD::ANY_EXTEND) { 1474894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue InnerOp = InOp.getNode()->getOperand(0); 1475894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT InnerVT = InnerOp.getValueType(); 1476894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((APInt::getHighBitsSet(BitWidth, 1477894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman BitWidth - InnerVT.getSizeInBits()) & 1478894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DemandedMask) == 0 && 1479894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isTypeDesirableForOp(ISD::SHL, InnerVT)) { 148019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EVT ShTy = getShiftAmountTy(InnerVT); 1481894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!APInt(BitWidth, ShAmt).isIntN(ShTy.getSizeInBits())) 1482894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ShTy = InnerVT; 1483894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue NarrowShl = 1484894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLO.DAG.getNode(ISD::SHL, dl, InnerVT, InnerOp, 1485894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLO.DAG.getConstant(ShAmt, ShTy)); 1486894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 1487894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLO.CombineTo(Op, 1488894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLO.DAG.getNode(ISD::ANY_EXTEND, dl, Op.getValueType(), 1489894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NarrowShl)); 1490894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1491894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1492894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1493894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero <<= SA->getZExtValue(); 1494894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne <<= SA->getZExtValue(); 1495894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // low bits known zero. 1496894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero |= APInt::getLowBitsSet(BitWidth, SA->getZExtValue()); 1497894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1498894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1499894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SRL: 1500894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstantSDNode *SA = dyn_cast<ConstantSDNode>(Op.getOperand(1))) { 1501894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT VT = Op.getValueType(); 1502894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned ShAmt = SA->getZExtValue(); 1503894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned VTSize = VT.getSizeInBits(); 1504894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue InOp = Op.getOperand(0); 150519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1506894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the shift count is an invalid immediate, don't do anything. 1507894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ShAmt >= BitWidth) 1508894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1509894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1510894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If this is ((X << C1) >>u ShAmt), see if we can simplify this into a 1511894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // single shift. We can do this if the top bits (which are shifted out) 1512894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // are never demanded. 1513894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (InOp.getOpcode() == ISD::SHL && 1514894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isa<ConstantSDNode>(InOp.getOperand(1))) { 1515894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ShAmt && (NewMask & APInt::getHighBitsSet(VTSize, ShAmt)) == 0) { 1516894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned C1= cast<ConstantSDNode>(InOp.getOperand(1))->getZExtValue(); 1517894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned Opc = ISD::SRL; 1518894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int Diff = ShAmt-C1; 1519894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Diff < 0) { 1520894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Diff = -Diff; 1521894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Opc = ISD::SHL; 152219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 152319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1524894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue NewSA = 1525894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLO.DAG.getConstant(Diff, Op.getOperand(1).getValueType()); 1526894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, TLO.DAG.getNode(Opc, dl, VT, 1527894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman InOp.getOperand(0), NewSA)); 1528894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 152919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 153019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1531894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Compute the new bits that are at the top now. 1532894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(InOp, (NewMask << ShAmt), 1533894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero, KnownOne, TLO, Depth+1)) 1534894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 153519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 1536894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero = KnownZero.lshr(ShAmt); 1537894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne = KnownOne.lshr(ShAmt); 1538894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1539894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt HighBits = APInt::getHighBitsSet(BitWidth, ShAmt); 1540894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero |= HighBits; // High bits known zero. 1541894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1542894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1543894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SRA: 1544894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If this is an arithmetic shift right and only the low-bit is set, we can 1545894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // always convert this into a logical shr, even if the shift amount is 1546894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // variable. The low bit of the shift cannot be an input sign bit unless 1547894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // the shift amount is >= the size of the datatype, which is undefined. 1548894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (DemandedMask == 1) 1549894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, 1550894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLO.DAG.getNode(ISD::SRL, dl, Op.getValueType(), 1551894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOperand(0), Op.getOperand(1))); 1552894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1553894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstantSDNode *SA = dyn_cast<ConstantSDNode>(Op.getOperand(1))) { 1554894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT VT = Op.getValueType(); 1555894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned ShAmt = SA->getZExtValue(); 155619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1557894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the shift count is an invalid immediate, don't do anything. 1558894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ShAmt >= BitWidth) 1559894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1560894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1561894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt InDemandedMask = (NewMask << ShAmt); 1562894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1563894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If any of the demanded bits are produced by the sign extension, we also 1564894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // demand the input sign bit. 1565894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt HighBits = APInt::getHighBitsSet(BitWidth, ShAmt); 1566894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (HighBits.intersects(NewMask)) 1567894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman InDemandedMask |= APInt::getSignBit(VT.getScalarType().getSizeInBits()); 156819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1569894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(0), InDemandedMask, 1570894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero, KnownOne, TLO, Depth+1)) 1571894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 157219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 1573894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero = KnownZero.lshr(ShAmt); 1574894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne = KnownOne.lshr(ShAmt); 157519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1576894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Handle the sign bit, adjusted to where it is now in the mask. 1577894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt SignBit = APInt::getSignBit(BitWidth).lshr(ShAmt); 157819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1579894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the input sign bit is known to be zero, or if none of the top bits 1580894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // are demanded, turn this into an unsigned shift right. 1581894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (KnownZero.intersects(SignBit) || (HighBits & ~NewMask) == HighBits) { 158219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TLO.CombineTo(Op, TLO.DAG.getNode(ISD::SRL, dl, VT, 1583894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOperand(0), 1584894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOperand(1))); 1585894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (KnownOne.intersects(SignBit)) { // New bits are known one. 1586894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne |= HighBits; 1587894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1588894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1589894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1590894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SIGN_EXTEND_INREG: { 1591894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT EVT = cast<VTSDNode>(Op.getOperand(1))->getVT(); 1592894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 159319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Sign extension. Compute the demanded bits in the result that are not 1594894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // present in the input. 1595894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt NewBits = 1596894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt::getHighBitsSet(BitWidth, 1597894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman BitWidth - EVT.getScalarType().getSizeInBits()); 159819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1599894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If none of the extended bits are demanded, eliminate the sextinreg. 1600894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((NewBits & NewMask) == 0) 1601894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, Op.getOperand(0)); 1602894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 160319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APInt InSignBit = 160419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APInt::getSignBit(EVT.getScalarType().getSizeInBits()).zext(BitWidth); 1605894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt InputDemandedBits = 1606894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt::getLowBitsSet(BitWidth, 1607894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT.getScalarType().getSizeInBits()) & 1608894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NewMask; 160919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1610894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Since the sign extended bits are demanded, we know that the sign 1611894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // bit is demanded. 1612894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman InputDemandedBits |= InSignBit; 1613894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1614894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(0), InputDemandedBits, 1615894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero, KnownOne, TLO, Depth+1)) 1616894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 161719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 1618894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1619894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the sign bit of the input is known set or clear, then we know the 1620894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // top bits of the result. 162119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1622894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the input sign bit is known zero, convert this into a zero extension. 1623894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (KnownZero.intersects(InSignBit)) 162419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TLO.CombineTo(Op, 1625894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLO.DAG.getZeroExtendInReg(Op.getOperand(0),dl,EVT)); 162619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1627894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (KnownOne.intersects(InSignBit)) { // Input sign bit known set 1628894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne |= NewBits; 1629894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero &= ~NewBits; 1630894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { // Input sign bit unknown 1631894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero &= ~NewBits; 1632894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne &= ~NewBits; 1633894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1634894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1635894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1636894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::ZERO_EXTEND: { 1637894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned OperandBitWidth = 1638894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOperand(0).getValueType().getScalarType().getSizeInBits(); 163919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APInt InMask = NewMask.trunc(OperandBitWidth); 164019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1641894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If none of the top bits are demanded, convert this into an any_extend. 1642894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt NewBits = 1643894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt::getHighBitsSet(BitWidth, BitWidth - OperandBitWidth) & NewMask; 1644894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!NewBits.intersects(NewMask)) 1645894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, TLO.DAG.getNode(ISD::ANY_EXTEND, dl, 164619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Op.getValueType(), 1647894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOperand(0))); 164819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1649894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(0), InMask, 1650894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero, KnownOne, TLO, Depth+1)) 1651894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 165219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 165319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman KnownZero = KnownZero.zext(BitWidth); 165419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman KnownOne = KnownOne.zext(BitWidth); 1655894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero |= NewBits; 1656894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1657894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1658894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SIGN_EXTEND: { 1659894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT InVT = Op.getOperand(0).getValueType(); 1660894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned InBits = InVT.getScalarType().getSizeInBits(); 1661894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt InMask = APInt::getLowBitsSet(BitWidth, InBits); 1662894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt InSignBit = APInt::getBitsSet(BitWidth, InBits - 1, InBits); 1663894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt NewBits = ~InMask & NewMask; 166419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1665894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If none of the top bits are demanded, convert this into an any_extend. 1666894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (NewBits == 0) 1667894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op,TLO.DAG.getNode(ISD::ANY_EXTEND, dl, 1668894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getValueType(), 1669894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOperand(0))); 167019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1671894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Since some of the sign extended bits are demanded, we know that the sign 1672894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // bit is demanded. 1673894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt InDemandedBits = InMask & NewMask; 1674894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman InDemandedBits |= InSignBit; 167519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman InDemandedBits = InDemandedBits.trunc(InBits); 167619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 167719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (SimplifyDemandedBits(Op.getOperand(0), InDemandedBits, KnownZero, 1678894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne, TLO, Depth+1)) 1679894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 168019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman KnownZero = KnownZero.zext(BitWidth); 168119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman KnownOne = KnownOne.zext(BitWidth); 168219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1683894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the sign bit is known zero, convert this to a zero extend. 1684894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (KnownZero.intersects(InSignBit)) 1685894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, TLO.DAG.getNode(ISD::ZERO_EXTEND, dl, 168619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Op.getValueType(), 1687894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOperand(0))); 168819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1689894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the sign bit is known one, the top bits match. 1690894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (KnownOne.intersects(InSignBit)) { 1691894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne |= NewBits; 1692894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero &= ~NewBits; 1693894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { // Otherwise, top bits aren't known. 1694894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne &= ~NewBits; 1695894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero &= ~NewBits; 1696894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1697894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1698894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1699894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::ANY_EXTEND: { 1700894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned OperandBitWidth = 1701894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOperand(0).getValueType().getScalarType().getSizeInBits(); 170219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APInt InMask = NewMask.trunc(OperandBitWidth); 1703894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(0), InMask, 1704894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero, KnownOne, TLO, Depth+1)) 1705894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 170619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 170719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman KnownZero = KnownZero.zext(BitWidth); 170819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman KnownOne = KnownOne.zext(BitWidth); 1709894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1710894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1711894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::TRUNCATE: { 1712894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Simplify the input, using demanded bit information, and compute the known 1713894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // zero/one bits live out. 1714894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned OperandBitWidth = 1715894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOperand(0).getValueType().getScalarType().getSizeInBits(); 171619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APInt TruncMask = NewMask.zext(OperandBitWidth); 1717894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(0), TruncMask, 1718894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero, KnownOne, TLO, Depth+1)) 1719894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 172019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman KnownZero = KnownZero.trunc(BitWidth); 172119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman KnownOne = KnownOne.trunc(BitWidth); 172219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1723894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the input is only used by this truncate, see if we can shrink it based 1724894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // on the known demanded bits. 1725894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Op.getOperand(0).getNode()->hasOneUse()) { 1726894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue In = Op.getOperand(0); 1727894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (In.getOpcode()) { 1728894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: break; 1729894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SRL: 1730894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Shrink SRL by a constant if none of the high bits shifted in are 1731894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // demanded. 1732894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TLO.LegalTypes() && 1733894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman !isTypeDesirableForOp(ISD::SRL, Op.getValueType())) 1734894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Do not turn (vt1 truncate (vt2 srl)) into (vt1 srl) if vt1 is 1735894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // undesirable. 1736894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1737894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ConstantSDNode *ShAmt = dyn_cast<ConstantSDNode>(In.getOperand(1)); 1738894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!ShAmt) 1739894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 174019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue Shift = In.getOperand(1); 174119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (TLO.LegalTypes()) { 174219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman uint64_t ShVal = ShAmt->getZExtValue(); 174319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Shift = 174419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TLO.DAG.getConstant(ShVal, getShiftAmountTy(Op.getValueType())); 174519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 174619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1747894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt HighBits = APInt::getHighBitsSet(OperandBitWidth, 1748894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman OperandBitWidth - BitWidth); 174919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman HighBits = HighBits.lshr(ShAmt->getZExtValue()).trunc(BitWidth); 1750894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1751894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ShAmt->getZExtValue() < BitWidth && !(HighBits & NewMask)) { 1752894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // None of the shifted in bits are needed. Add a truncate of the 1753894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // shift input, then shift it. 1754894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue NewTrunc = TLO.DAG.getNode(ISD::TRUNCATE, dl, 175519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Op.getValueType(), 1756894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman In.getOperand(0)); 1757894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, TLO.DAG.getNode(ISD::SRL, dl, 1758894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getValueType(), 175919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman NewTrunc, 176019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Shift)); 1761894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1762894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1763894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1764894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 176519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 176619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 1767894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1768894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1769894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::AssertZext: { 177019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // AssertZext demands all of the high bits, plus any of the low bits 177119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // demanded by its users. 1772894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT VT = cast<VTSDNode>(Op.getOperand(1))->getVT(); 1773894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt InMask = APInt::getLowBitsSet(BitWidth, 1774894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman VT.getSizeInBits()); 177519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (SimplifyDemandedBits(Op.getOperand(0), ~InMask | NewMask, 177619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman KnownZero, KnownOne, TLO, Depth+1)) 177719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return true; 177819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 177919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1780894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero |= ~InMask & NewMask; 1781894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1782894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 178319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case ISD::BITCAST: 178419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If this is an FP->Int bitcast and if the sign bit is the only 178519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // thing demanded, turn this into a FGETSIGN. 178619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!Op.getOperand(0).getValueType().isVector() && 178719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman NewMask == APInt::getSignBit(Op.getValueType().getSizeInBits()) && 178819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Op.getOperand(0).getValueType().isFloatingPoint()) { 178919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool OpVTLegal = isOperationLegalOrCustom(ISD::FGETSIGN, Op.getValueType()); 179019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bool i32Legal = isOperationLegalOrCustom(ISD::FGETSIGN, MVT::i32); 179119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if ((OpVTLegal || i32Legal) && Op.getValueType().isSimple()) { 179219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EVT Ty = OpVTLegal ? Op.getValueType() : MVT::i32; 1793894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Make a FGETSIGN + SHL to move the sign bit into the appropriate 1794894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // place. We expect the SHL to be eliminated by other optimizations. 179519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue Sign = TLO.DAG.getNode(ISD::FGETSIGN, dl, Ty, Op.getOperand(0)); 179619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned OpVTSizeInBits = Op.getValueType().getSizeInBits(); 179719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!OpVTLegal && OpVTSizeInBits > 32) 179819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Sign = TLO.DAG.getNode(ISD::ZERO_EXTEND, dl, Op.getValueType(), Sign); 1799894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned ShVal = Op.getValueType().getSizeInBits()-1; 180019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue ShAmt = TLO.DAG.getConstant(ShVal, Op.getValueType()); 180119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return TLO.CombineTo(Op, TLO.DAG.getNode(ISD::SHL, dl, 180219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Op.getValueType(), 1803894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Sign, ShAmt)); 1804894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1805894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1806894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1807894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::ADD: 1808894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::MUL: 1809894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SUB: { 1810894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Add, Sub, and Mul don't demand any bits in positions beyond that 1811894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // of the highest bit demanded of them. 1812894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt LoMask = APInt::getLowBitsSet(BitWidth, 1813894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman BitWidth - NewMask.countLeadingZeros()); 1814894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(0), LoMask, KnownZero2, 1815894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne2, TLO, Depth+1)) 1816894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1817894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (SimplifyDemandedBits(Op.getOperand(1), LoMask, KnownZero2, 1818894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownOne2, TLO, Depth+1)) 1819894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1820894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // See if the operation should be performed at a smaller bit width. 1821894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TLO.ShrinkDemandedOp(Op, BitWidth, NewMask, dl)) 1822894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1823894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1824894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FALL THROUGH 1825894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: 1826894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Just use ComputeMaskedBits to compute output bits. 1827894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLO.DAG.ComputeMaskedBits(Op, NewMask, KnownZero, KnownOne, Depth); 1828894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 1829894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 183019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1831894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If we know the value of all of the demanded bits, return this as a 1832894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // constant. 1833894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((NewMask & (KnownZero|KnownOne)) == NewMask) 1834894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return TLO.CombineTo(Op, TLO.DAG.getConstant(KnownOne, Op.getValueType())); 183519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 1836894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 1837894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1838894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 183919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// computeMaskedBitsForTargetNode - Determine which of the bits specified 184019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// in Mask are known to be either zero or one and return them in the 1841894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// KnownZero/KnownOne bitsets. 184219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanvoid TargetLowering::computeMaskedBitsForTargetNode(const SDValue Op, 1843894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const APInt &Mask, 184419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APInt &KnownZero, 1845894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt &KnownOne, 1846894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const SelectionDAG &DAG, 1847894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned Depth) const { 1848894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert((Op.getOpcode() >= ISD::BUILTIN_OP_END || 1849894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOpcode() == ISD::INTRINSIC_WO_CHAIN || 1850894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOpcode() == ISD::INTRINSIC_W_CHAIN || 1851894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOpcode() == ISD::INTRINSIC_VOID) && 1852894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "Should use MaskedValueIsZero if you don't know whether Op" 1853894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman " is a target node!"); 1854894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0); 1855894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1856894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1857894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ComputeNumSignBitsForTargetNode - This method can be implemented by 1858894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// targets that want to expose additional information about sign bits to the 1859894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// DAG Combiner. 1860894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanunsigned TargetLowering::ComputeNumSignBitsForTargetNode(SDValue Op, 1861894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned Depth) const { 1862894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert((Op.getOpcode() >= ISD::BUILTIN_OP_END || 1863894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOpcode() == ISD::INTRINSIC_WO_CHAIN || 1864894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOpcode() == ISD::INTRINSIC_W_CHAIN || 1865894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getOpcode() == ISD::INTRINSIC_VOID) && 1866894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "Should use ComputeNumSignBits if you don't know whether Op" 1867894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman " is a target node!"); 1868894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 1; 1869894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1870894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1871894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ValueHasExactlyOneBitSet - Test if the given value is known to have exactly 1872894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// one bit set. This differs from ComputeMaskedBits in that it doesn't need to 1873894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// determine which bit is set. 1874894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 1875894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanstatic bool ValueHasExactlyOneBitSet(SDValue Val, const SelectionDAG &DAG) { 1876894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // A left-shift of a constant one will have exactly one bit set, because 1877894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // shifting the bit off the end is undefined. 1878894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Val.getOpcode() == ISD::SHL) 1879894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstantSDNode *C = 1880894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman dyn_cast<ConstantSDNode>(Val.getNode()->getOperand(0))) 1881894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (C->getAPIntValue() == 1) 1882894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1883894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1884894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Similarly, a right-shift of a constant sign-bit will have exactly 1885894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // one bit set. 1886894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Val.getOpcode() == ISD::SRL) 1887894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstantSDNode *C = 1888894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman dyn_cast<ConstantSDNode>(Val.getNode()->getOperand(0))) 1889894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (C->getAPIntValue().isSignBit()) 1890894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 1891894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1892894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // More could be done here, though the above checks are enough 1893894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // to handle some common cases. 1894894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1895894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Fall back to ComputeMaskedBits to catch other known cases. 1896894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT OpVT = Val.getValueType(); 1897894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned BitWidth = OpVT.getScalarType().getSizeInBits(); 1898894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt Mask = APInt::getAllOnesValue(BitWidth); 1899894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt KnownZero, KnownOne; 1900894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.ComputeMaskedBits(Val, Mask, KnownZero, KnownOne); 1901894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return (KnownZero.countPopulation() == BitWidth - 1) && 1902894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (KnownOne.countPopulation() == 1); 1903894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 1904894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 190519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// SimplifySetCC - Try to simplify a setcc built with the specified operands 1906894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// and cc. If it is unable to simplify it, return a null SDValue. 1907894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanSDValue 1908894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanTargetLowering::SimplifySetCC(EVT VT, SDValue N0, SDValue N1, 1909894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ISD::CondCode Cond, bool foldBooleans, 1910894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAGCombinerInfo &DCI, DebugLoc dl) const { 1911894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SelectionDAG &DAG = DCI.DAG; 1912894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1913894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // These setcc operations always fold. 1914894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (Cond) { 1915894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: break; 1916894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETFALSE: 1917894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETFALSE2: return DAG.getConstant(0, VT); 1918894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETTRUE: 1919894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETTRUE2: return DAG.getConstant(1, VT); 1920894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1921894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 192219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Ensure that the constant occurs on the RHS, and fold constant 192319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // comparisons. 192419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (isa<ConstantSDNode>(N0.getNode())) 1925894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N1, N0, ISD::getSetCCSwappedOperands(Cond)); 1926894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1927894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstantSDNode *N1C = dyn_cast<ConstantSDNode>(N1.getNode())) { 1928894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const APInt &C1 = N1C->getAPIntValue(); 1929894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 1930894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the LHS is '(srl (ctlz x), 5)', the RHS is 0/1, and this is an 1931894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // equality comparison, then we're just comparing whether X itself is 1932894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // zero. 1933894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOpcode() == ISD::SRL && (C1 == 0 || C1 == 1) && 1934894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getOperand(0).getOpcode() == ISD::CTLZ && 1935894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getOperand(1).getOpcode() == ISD::Constant) { 1936894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const APInt &ShAmt 1937894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman = cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue(); 1938894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((Cond == ISD::SETEQ || Cond == ISD::SETNE) && 1939894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ShAmt == Log2_32(N0.getValueType().getSizeInBits())) { 1940894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((C1 == 0) == (Cond == ISD::SETEQ)) { 1941894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // (srl (ctlz x), 5) == 0 -> X != 0 1942894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // (srl (ctlz x), 5) != 1 -> X != 0 1943894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond = ISD::SETNE; 1944894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { 1945894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // (srl (ctlz x), 5) != 0 -> X == 0 1946894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // (srl (ctlz x), 5) == 1 -> X == 0 1947894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond = ISD::SETEQ; 1948894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1949894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue Zero = DAG.getConstant(0, N0.getValueType()); 1950894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0.getOperand(0).getOperand(0), 1951894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Zero, Cond); 1952894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1953894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 1954894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 195519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue CTPOP = N0; 195619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Look through truncs that don't change the value of a ctpop. 195719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (N0.hasOneUse() && N0.getOpcode() == ISD::TRUNCATE) 195819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CTPOP = N0.getOperand(0); 195919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 196019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (CTPOP.hasOneUse() && CTPOP.getOpcode() == ISD::CTPOP && 196119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman (N0 == CTPOP || N0.getValueType().getSizeInBits() > 196219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Log2_32_Ceil(CTPOP.getValueType().getSizeInBits()))) { 196319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EVT CTVT = CTPOP.getValueType(); 196419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue CTOp = CTPOP.getOperand(0); 196519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 196619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // (ctpop x) u< 2 -> (x & x-1) == 0 196719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // (ctpop x) u> 1 -> (x & x-1) != 0 196819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if ((Cond == ISD::SETULT && C1 == 2) || (Cond == ISD::SETUGT && C1 == 1)){ 196919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue Sub = DAG.getNode(ISD::SUB, dl, CTVT, CTOp, 197019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DAG.getConstant(1, CTVT)); 197119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue And = DAG.getNode(ISD::AND, dl, CTVT, CTOp, Sub); 197219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ISD::CondCode CC = Cond == ISD::SETULT ? ISD::SETEQ : ISD::SETNE; 197319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getSetCC(dl, VT, And, DAG.getConstant(0, CTVT), CC); 197419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 197519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 197619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // TODO: (ctpop x) == 1 -> x && (x & x-1) == 0 iff ctpop is illegal. 197719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 197819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 197919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // (zext x) == C --> x == (trunc C) 198019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (DCI.isBeforeLegalize() && N0->hasOneUse() && 198119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman (Cond == ISD::SETEQ || Cond == ISD::SETNE)) { 198219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned MinBits = N0.getValueSizeInBits(); 198319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue PreZExt; 198419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (N0->getOpcode() == ISD::ZERO_EXTEND) { 198519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // ZExt 198619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MinBits = N0->getOperand(0).getValueSizeInBits(); 198719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman PreZExt = N0->getOperand(0); 198819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else if (N0->getOpcode() == ISD::AND) { 198919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // DAGCombine turns costly ZExts into ANDs 199019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(N0->getOperand(1))) 199119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if ((C->getAPIntValue()+1).isPowerOf2()) { 199219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MinBits = C->getAPIntValue().countTrailingOnes(); 199319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman PreZExt = N0->getOperand(0); 199419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 199519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else if (LoadSDNode *LN0 = dyn_cast<LoadSDNode>(N0)) { 199619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // ZEXTLOAD 199719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (LN0->getExtensionType() == ISD::ZEXTLOAD) { 199819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman MinBits = LN0->getMemoryVT().getSizeInBits(); 199919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman PreZExt = N0; 200019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 200119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 200219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 200319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Make sure we're not loosing bits from the constant. 200419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (MinBits < C1.getBitWidth() && MinBits > C1.getActiveBits()) { 200519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EVT MinVT = EVT::getIntegerVT(*DAG.getContext(), MinBits); 200619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (isTypeDesirableForOp(ISD::SETCC, MinVT)) { 200719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Will get folded away. 200819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue Trunc = DAG.getNode(ISD::TRUNCATE, dl, MinVT, PreZExt); 200919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue C = DAG.getConstant(C1.trunc(MinBits), MinVT); 201019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getSetCC(dl, VT, Trunc, C, Cond); 201119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 201219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 201319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 201419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2015894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the LHS is '(and load, const)', the RHS is 0, 2016894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // the test is for equality or unsigned, and all 1 bits of the const are 2017894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // in the same partial word, see if we can shorten the load. 2018894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (DCI.isBeforeLegalize() && 2019894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getOpcode() == ISD::AND && C1 == 0 && 2020894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getNode()->hasOneUse() && 2021894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isa<LoadSDNode>(N0.getOperand(0)) && 2022894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getOperand(0).getNode()->hasOneUse() && 2023894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isa<ConstantSDNode>(N0.getOperand(1))) { 2024894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman LoadSDNode *Lod = cast<LoadSDNode>(N0.getOperand(0)); 2025894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt bestMask; 2026894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned bestWidth = 0, bestOffset = 0; 2027894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!Lod->isVolatile() && Lod->isUnindexed()) { 2028894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned origWidth = N0.getValueType().getSizeInBits(); 2029894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned maskWidth = origWidth; 203019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // We can narrow (e.g.) 16-bit extending loads on 32-bit target to 2031894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // 8 bits, but have to be careful... 2032894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Lod->getExtensionType() != ISD::NON_EXTLOAD) 2033894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman origWidth = Lod->getMemoryVT().getSizeInBits(); 2034894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const APInt &Mask = 2035894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue(); 2036894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned width = origWidth / 2; width>=8; width /= 2) { 2037894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt newMask = APInt::getLowBitsSet(maskWidth, width); 2038894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned offset=0; offset<origWidth/width; offset++) { 2039894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((newMask & Mask) == Mask) { 2040894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!TD->isLittleEndian()) 2041894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bestOffset = (origWidth/width - offset - 1) * (width/8); 2042894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else 2043894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bestOffset = (uint64_t)offset * (width/8); 2044894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bestMask = Mask.lshr(offset * (width/8) * 8); 2045894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bestWidth = width; 2046894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 2047894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2048894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman newMask = newMask << width; 2049894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2050894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2051894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2052894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (bestWidth) { 205319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EVT newVT = EVT::getIntegerVT(*DAG.getContext(), bestWidth); 2054894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (newVT.isRound()) { 2055894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT PtrType = Lod->getOperand(1).getValueType(); 2056894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue Ptr = Lod->getBasePtr(); 2057894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (bestOffset != 0) 2058894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Ptr = DAG.getNode(ISD::ADD, dl, PtrType, Lod->getBasePtr(), 2059894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(bestOffset, PtrType)); 2060894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned NewAlign = MinAlign(Lod->getAlignment(), bestOffset); 2061894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue NewLoad = DAG.getLoad(newVT, dl, Lod->getChain(), Ptr, 206219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Lod->getPointerInfo().getWithOffset(bestOffset), 2063894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman false, false, NewAlign); 206419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getSetCC(dl, VT, 2065894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getNode(ISD::AND, dl, newVT, NewLoad, 2066894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(bestMask.trunc(bestWidth), 2067894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman newVT)), 2068894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(0LL, newVT), Cond); 2069894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2070894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2071894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2072894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2073894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the LHS is a ZERO_EXTEND, perform the comparison on the input. 2074894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOpcode() == ISD::ZERO_EXTEND) { 2075894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned InSize = N0.getOperand(0).getValueType().getSizeInBits(); 2076894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2077894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the comparison constant has bits in the upper part, the 2078894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // zero-extended value could never match. 2079894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (C1.intersects(APInt::getHighBitsSet(C1.getBitWidth(), 2080894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman C1.getBitWidth() - InSize))) { 2081894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (Cond) { 2082894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETUGT: 2083894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETUGE: 2084894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETEQ: return DAG.getConstant(0, VT); 2085894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETULT: 2086894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETULE: 2087894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETNE: return DAG.getConstant(1, VT); 2088894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETGT: 2089894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETGE: 2090894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // True if the sign bit of C1 is set. 2091894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getConstant(C1.isNegative(), VT); 2092894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETLT: 2093894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETLE: 2094894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // True if the sign bit of C1 isn't set. 2095894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getConstant(C1.isNonNegative(), VT); 2096894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: 2097894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 2098894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2099894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2100894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2101894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise, we can perform the comparison with the low bits. 2102894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (Cond) { 2103894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETEQ: 2104894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETNE: 2105894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETUGT: 2106894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETUGE: 2107894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETULT: 2108894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETULE: { 2109894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT newVT = N0.getOperand(0).getValueType(); 2110894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (DCI.isBeforeLegalizeOps() || 2111894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (isOperationLegal(ISD::SETCC, newVT) && 2112894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman getCondCodeAction(Cond, newVT)==Legal)) 2113894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0.getOperand(0), 211419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DAG.getConstant(C1.trunc(InSize), newVT), 2115894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond); 2116894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 2117894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2118894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: 2119894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; // todo, be more careful with signed comparisons 2120894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2121894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (N0.getOpcode() == ISD::SIGN_EXTEND_INREG && 2122894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (Cond == ISD::SETEQ || Cond == ISD::SETNE)) { 2123894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT ExtSrcTy = cast<VTSDNode>(N0.getOperand(1))->getVT(); 2124894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned ExtSrcTyBits = ExtSrcTy.getSizeInBits(); 2125894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT ExtDstTy = N0.getValueType(); 2126894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned ExtDstTyBits = ExtDstTy.getSizeInBits(); 2127894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2128894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the constant doesn't fit into the number of bits for the source of 2129894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // the sign extension, it is impossible for both sides to be equal. 2130894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (C1.getMinSignedBits() > ExtSrcTyBits) 2131894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getConstant(Cond == ISD::SETNE, VT); 213219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2133894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue ZextOp; 2134894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT Op0Ty = N0.getOperand(0).getValueType(); 2135894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Op0Ty == ExtSrcTy) { 2136894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ZextOp = N0.getOperand(0); 2137894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { 2138894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt Imm = APInt::getLowBitsSet(ExtDstTyBits, ExtSrcTyBits); 2139894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ZextOp = DAG.getNode(ISD::AND, dl, Op0Ty, N0.getOperand(0), 2140894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(Imm, Op0Ty)); 2141894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2142894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!DCI.isCalledByLegalizer()) 2143894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DCI.AddToWorklist(ZextOp.getNode()); 2144894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise, make this a use of a zext. 214519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getSetCC(dl, VT, ZextOp, 2146894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(C1 & APInt::getLowBitsSet( 2147894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ExtDstTyBits, 214819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ExtSrcTyBits), 2149894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ExtDstTy), 2150894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond); 2151894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if ((N1C->isNullValue() || N1C->getAPIntValue() == 1) && 2152894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (Cond == ISD::SETEQ || Cond == ISD::SETNE)) { 2153894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // SETCC (SETCC), [0|1], [EQ|NE] -> SETCC 2154894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOpcode() == ISD::SETCC && 2155894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isTypeLegal(VT) && VT.bitsLE(N0.getValueType())) { 2156894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman bool TrueWhenTrue = (Cond == ISD::SETEQ) ^ (N1C->getAPIntValue() != 1); 2157894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (TrueWhenTrue) 215819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getNode(ISD::TRUNCATE, dl, VT, N0); 2159894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Invert the condition. 2160894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ISD::CondCode CC = cast<CondCodeSDNode>(N0.getOperand(2))->get(); 216119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman CC = ISD::getSetCCInverse(CC, 2162894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getOperand(0).getValueType().isInteger()); 2163894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0.getOperand(0), N0.getOperand(1), CC); 2164894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2165894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2166894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((N0.getOpcode() == ISD::XOR || 216719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman (N0.getOpcode() == ISD::AND && 2168894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getOperand(0).getOpcode() == ISD::XOR && 2169894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getOperand(1) == N0.getOperand(0).getOperand(1))) && 2170894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isa<ConstantSDNode>(N0.getOperand(1)) && 2171894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman cast<ConstantSDNode>(N0.getOperand(1))->getAPIntValue() == 1) { 2172894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If this is (X^1) == 0/1, swap the RHS and eliminate the xor. We 2173894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // can only do this if the top bits are known zero. 2174894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned BitWidth = N0.getValueSizeInBits(); 2175894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (DAG.MaskedValueIsZero(N0, 2176894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt::getHighBitsSet(BitWidth, 2177894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman BitWidth-1))) { 2178894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Okay, get the un-inverted input value. 2179894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue Val; 2180894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOpcode() == ISD::XOR) 2181894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Val = N0.getOperand(0); 2182894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else { 218319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert(N0.getOpcode() == ISD::AND && 2184894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getOperand(0).getOpcode() == ISD::XOR); 2185894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // ((X^1)&1)^1 -> X & 1 2186894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Val = DAG.getNode(ISD::AND, dl, N0.getValueType(), 2187894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getOperand(0).getOperand(0), 2188894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getOperand(1)); 2189894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2190894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2191894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, Val, N1, 2192894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond == ISD::SETEQ ? ISD::SETNE : ISD::SETEQ); 2193894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2194894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (N1C->getAPIntValue() == 1 && 2195894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (VT == MVT::i1 || 219619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getBooleanContents(false) == ZeroOrOneBooleanContent)) { 2197894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue Op0 = N0; 2198894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Op0.getOpcode() == ISD::TRUNCATE) 2199894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op0 = Op0.getOperand(0); 2200894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2201894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((Op0.getOpcode() == ISD::XOR) && 2202894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op0.getOperand(0).getOpcode() == ISD::SETCC && 2203894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op0.getOperand(1).getOpcode() == ISD::SETCC) { 2204894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // (xor (setcc), (setcc)) == / != 1 -> (setcc) != / == (setcc) 2205894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond = (Cond == ISD::SETEQ) ? ISD::SETNE : ISD::SETEQ; 2206894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, Op0.getOperand(0), Op0.getOperand(1), 2207894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond); 2208894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (Op0.getOpcode() == ISD::AND && 2209894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isa<ConstantSDNode>(Op0.getOperand(1)) && 2210894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman cast<ConstantSDNode>(Op0.getOperand(1))->getAPIntValue() == 1) { 2211894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If this is (X&1) == / != 1, normalize it to (X&1) != / == 0. 2212894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Op0.getValueType().bitsGT(VT)) 2213894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op0 = DAG.getNode(ISD::AND, dl, VT, 2214894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getNode(ISD::TRUNCATE, dl, VT, Op0.getOperand(0)), 2215894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(1, VT)); 2216894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (Op0.getValueType().bitsLT(VT)) 2217894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op0 = DAG.getNode(ISD::AND, dl, VT, 2218894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getNode(ISD::ANY_EXTEND, dl, VT, Op0.getOperand(0)), 2219894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(1, VT)); 2220894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2221894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, Op0, 2222894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(0, Op0.getValueType()), 2223894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond == ISD::SETEQ ? ISD::SETNE : ISD::SETEQ); 2224894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2225894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2226894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 222719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2228894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt MinVal, MaxVal; 2229894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned OperandBitSize = N1C->getValueType(0).getSizeInBits(); 2230894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ISD::isSignedIntSetCC(Cond)) { 2231894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MinVal = APInt::getSignedMinValue(OperandBitSize); 2232894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MaxVal = APInt::getSignedMaxValue(OperandBitSize); 2233894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { 2234894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MinVal = APInt::getMinValue(OperandBitSize); 2235894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MaxVal = APInt::getMaxValue(OperandBitSize); 2236894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2237894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2238894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Canonicalize GE/LE comparisons to use GT/LT comparisons. 2239894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETGE || Cond == ISD::SETUGE) { 2240894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (C1 == MinVal) return DAG.getConstant(1, VT); // X >= MIN --> true 2241894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // X >= C0 --> X > (C0-1) 224219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getSetCC(dl, VT, N0, 2243894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(C1-1, N1.getValueType()), 2244894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (Cond == ISD::SETGE) ? ISD::SETGT : ISD::SETUGT); 2245894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2246894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2247894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETLE || Cond == ISD::SETULE) { 2248894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (C1 == MaxVal) return DAG.getConstant(1, VT); // X <= MAX --> true 2249894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // X <= C0 --> X < (C0+1) 225019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getSetCC(dl, VT, N0, 2251894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(C1+1, N1.getValueType()), 2252894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (Cond == ISD::SETLE) ? ISD::SETLT : ISD::SETULT); 2253894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2254894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2255894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C1 == MinVal) 2256894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getConstant(0, VT); // X < MIN --> false 2257894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((Cond == ISD::SETGE || Cond == ISD::SETUGE) && C1 == MinVal) 2258894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getConstant(1, VT); // X >= MIN --> true 2259894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C1 == MaxVal) 2260894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getConstant(0, VT); // X > MAX --> false 2261894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((Cond == ISD::SETLE || Cond == ISD::SETULE) && C1 == MaxVal) 2262894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getConstant(1, VT); // X <= MAX --> true 2263894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2264894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Canonicalize setgt X, Min --> setne X, Min 2265894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C1 == MinVal) 2266894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, N1, ISD::SETNE); 2267894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Canonicalize setlt X, Max --> setne X, Max 2268894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C1 == MaxVal) 2269894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, N1, ISD::SETNE); 2270894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2271894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If we have setult X, 1, turn it into seteq X, 0 2272894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((Cond == ISD::SETLT || Cond == ISD::SETULT) && C1 == MinVal+1) 227319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getSetCC(dl, VT, N0, 227419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DAG.getConstant(MinVal, N0.getValueType()), 2275894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ISD::SETEQ); 2276894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If we have setugt X, Max-1, turn it into seteq X, Max 2277894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if ((Cond == ISD::SETGT || Cond == ISD::SETUGT) && C1 == MaxVal-1) 227819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getSetCC(dl, VT, N0, 2279894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(MaxVal, N0.getValueType()), 2280894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ISD::SETEQ); 2281894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2282894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If we have "setcc X, C0", check to see if we can shrink the immediate 2283894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // by changing cc. 2284894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2285894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // SETUGT X, SINTMAX -> SETLT X, 0 228619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Cond == ISD::SETUGT && 2287894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman C1 == APInt::getSignedMaxValue(OperandBitSize)) 228819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getSetCC(dl, VT, N0, 2289894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(0, N1.getValueType()), 2290894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ISD::SETLT); 2291894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2292894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // SETULT X, SINTMIN -> SETGT X, -1 2293894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETULT && 2294894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman C1 == APInt::getSignedMinValue(OperandBitSize)) { 2295894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue ConstMinusOne = 2296894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(APInt::getAllOnesValue(OperandBitSize), 2297894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N1.getValueType()); 2298894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, ConstMinusOne, ISD::SETGT); 2299894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2300894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2301894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Fold bit comparisons when we can. 2302894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((Cond == ISD::SETEQ || Cond == ISD::SETNE) && 2303894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (VT == N0.getValueType() || 2304894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman (isTypeLegal(VT) && VT.bitsLE(N0.getValueType()))) && 2305894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getOpcode() == ISD::AND) 2306894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstantSDNode *AndRHS = 2307894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman dyn_cast<ConstantSDNode>(N0.getOperand(1))) { 2308894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT ShiftTy = DCI.isBeforeLegalize() ? 230919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getPointerTy() : getShiftAmountTy(N0.getValueType()); 2310894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETNE && C1 == 0) {// (X & 8) != 0 --> (X & 8) >> 3 2311894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Perform the xform if the AND RHS is a single bit. 2312894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (AndRHS->getAPIntValue().isPowerOf2()) { 2313894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getNode(ISD::TRUNCATE, dl, VT, 2314894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getNode(ISD::SRL, dl, N0.getValueType(), N0, 2315894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(AndRHS->getAPIntValue().logBase2(), ShiftTy))); 2316894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2317894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (Cond == ISD::SETEQ && C1 == AndRHS->getAPIntValue()) { 2318894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // (X & 8) == 8 --> (X & 8) >> 3 2319894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Perform the xform if C1 is a single bit. 2320894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (C1.isPowerOf2()) { 2321894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getNode(ISD::TRUNCATE, dl, VT, 2322894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getNode(ISD::SRL, dl, N0.getValueType(), N0, 2323894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(C1.logBase2(), ShiftTy))); 2324894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2325894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2326894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2327894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2328894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2329894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (isa<ConstantFPSDNode>(N0.getNode())) { 2330894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Constant fold or commute setcc. 2331894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue O = DAG.FoldSetCC(VT, N0, N1, Cond, dl); 2332894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (O.getNode()) return O; 2333894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (ConstantFPSDNode *CFP = dyn_cast<ConstantFPSDNode>(N1.getNode())) { 2334894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the RHS of an FP comparison is a constant, simplify it away in 2335894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // some cases. 2336894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (CFP->getValueAPF().isNaN()) { 2337894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If an operand is known to be a nan, we can fold it. 2338894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (ISD::getUnorderedFlavor(Cond)) { 2339894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: llvm_unreachable("Unknown flavor!"); 2340894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 0: // Known false. 2341894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getConstant(0, VT); 2342894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 1: // Known true. 2343894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getConstant(1, VT); 2344894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 2: // Undefined. 2345894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getUNDEF(VT); 2346894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2347894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 234819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2349894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise, we know the RHS is not a NaN. Simplify the node to drop the 2350894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // constant if knowing that the operand is non-nan is enough. We prefer to 2351894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // have SETO(x,x) instead of SETO(x, 0.0) because this avoids having to 2352894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // materialize 0.0. 2353894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETO || Cond == ISD::SETUO) 2354894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, N0, Cond); 2355894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2356894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the condition is not legal, see if we can find an equivalent one 2357894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // which is legal. 2358894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!isCondCodeLegal(Cond, N0.getValueType())) { 2359894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If the comparison was an awkward floating-point == or != and one of 2360894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // the comparison operands is infinity or negative infinity, convert the 2361894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // condition to a less-awkward <= or >=. 2362894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (CFP->getValueAPF().isInfinity()) { 2363894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (CFP->getValueAPF().isNegative()) { 2364894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETOEQ && 2365894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isCondCodeLegal(ISD::SETOLE, N0.getValueType())) 2366894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, N1, ISD::SETOLE); 2367894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETUEQ && 2368894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isCondCodeLegal(ISD::SETOLE, N0.getValueType())) 2369894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, N1, ISD::SETULE); 2370894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETUNE && 2371894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isCondCodeLegal(ISD::SETUGT, N0.getValueType())) 2372894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, N1, ISD::SETUGT); 2373894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETONE && 2374894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isCondCodeLegal(ISD::SETUGT, N0.getValueType())) 2375894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, N1, ISD::SETOGT); 2376894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { 2377894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETOEQ && 2378894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isCondCodeLegal(ISD::SETOGE, N0.getValueType())) 2379894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, N1, ISD::SETOGE); 2380894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETUEQ && 2381894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isCondCodeLegal(ISD::SETOGE, N0.getValueType())) 2382894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, N1, ISD::SETUGE); 2383894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETUNE && 2384894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isCondCodeLegal(ISD::SETULT, N0.getValueType())) 2385894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, N1, ISD::SETULT); 2386894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Cond == ISD::SETONE && 2387894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman isCondCodeLegal(ISD::SETULT, N0.getValueType())) 2388894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, N1, ISD::SETOLT); 2389894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2390894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2391894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2392894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2393894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2394894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0 == N1) { 2395894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // We can always fold X == X for integer setcc's. 2396894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getValueType().isInteger()) 2397894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getConstant(ISD::isTrueWhenEqual(Cond), VT); 2398894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned UOF = ISD::getUnorderedFlavor(Cond); 2399894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (UOF == 2) // FP operators that are undefined on NaNs. 2400894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getConstant(ISD::isTrueWhenEqual(Cond), VT); 2401894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (UOF == unsigned(ISD::isTrueWhenEqual(Cond))) 2402894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getConstant(UOF, VT); 2403894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise, we can't fold it. However, we can simplify it to SETUO/SETO 2404894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // if it is not already. 2405894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ISD::CondCode NewCond = UOF == 0 ? ISD::SETO : ISD::SETUO; 2406894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (NewCond != Cond) 2407894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, N1, NewCond); 2408894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2409894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2410894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if ((Cond == ISD::SETEQ || Cond == ISD::SETNE) && 2411894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getValueType().isInteger()) { 2412894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOpcode() == ISD::ADD || N0.getOpcode() == ISD::SUB || 2413894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getOpcode() == ISD::XOR) { 2414894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Simplify (X+Y) == (X+Z) --> Y == Z 2415894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOpcode() == N1.getOpcode()) { 2416894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOperand(0) == N1.getOperand(0)) 2417894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0.getOperand(1), N1.getOperand(1), Cond); 2418894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOperand(1) == N1.getOperand(1)) 2419894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0.getOperand(0), N1.getOperand(0), Cond); 2420894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (DAG.isCommutativeBinOp(N0.getOpcode())) { 2421894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If X op Y == Y op X, try other combinations. 2422894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOperand(0) == N1.getOperand(1)) 242319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getSetCC(dl, VT, N0.getOperand(1), N1.getOperand(0), 2424894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond); 2425894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOperand(1) == N1.getOperand(0)) 242619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getSetCC(dl, VT, N0.getOperand(0), N1.getOperand(1), 2427894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond); 2428894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2429894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 243019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2431894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstantSDNode *RHSC = dyn_cast<ConstantSDNode>(N1)) { 2432894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstantSDNode *LHSR = dyn_cast<ConstantSDNode>(N0.getOperand(1))) { 2433894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Turn (X+C1) == C2 --> X == C2-C1 2434894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOpcode() == ISD::ADD && N0.getNode()->hasOneUse()) { 2435894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0.getOperand(0), 2436894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(RHSC->getAPIntValue()- 2437894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman LHSR->getAPIntValue(), 2438894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getValueType()), Cond); 2439894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 244019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2441894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Turn (X^C1) == C2 into X == C1^C2 iff X&~C1 = 0. 2442894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOpcode() == ISD::XOR) 2443894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If we know that all of the inverted bits are zero, don't bother 2444894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // performing the inversion. 2445894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (DAG.MaskedValueIsZero(N0.getOperand(0), ~LHSR->getAPIntValue())) 2446894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 2447894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getSetCC(dl, VT, N0.getOperand(0), 2448894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(LHSR->getAPIntValue() ^ 2449894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RHSC->getAPIntValue(), 2450894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getValueType()), 2451894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond); 2452894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 245319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2454894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Turn (C1-X) == C2 --> X == C1-C2 2455894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstantSDNode *SUBC = dyn_cast<ConstantSDNode>(N0.getOperand(0))) { 2456894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOpcode() == ISD::SUB && N0.getNode()->hasOneUse()) { 2457894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 2458894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getSetCC(dl, VT, N0.getOperand(1), 2459894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(SUBC->getAPIntValue() - 2460894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman RHSC->getAPIntValue(), 2461894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0.getValueType()), 2462894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond); 2463894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 246419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 2465894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2466894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2467894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Simplify (X+Z) == X --> Z == 0 2468894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOperand(0) == N1) 2469894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0.getOperand(1), 2470894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(0, N0.getValueType()), Cond); 2471894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOperand(1) == N1) { 2472894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (DAG.isCommutativeBinOp(N0.getOpcode())) 2473894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0.getOperand(0), 2474894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(0, N0.getValueType()), Cond); 2475894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (N0.getNode()->hasOneUse()) { 2476894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(N0.getOpcode() == ISD::SUB && "Unexpected operation!"); 2477894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // (Z-X) == X --> Z == X<<1 2478894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue SH = DAG.getNode(ISD::SHL, dl, N1.getValueType(), 247919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman N1, 248019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DAG.getConstant(1, getShiftAmountTy(N1.getValueType()))); 2481894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!DCI.isCalledByLegalizer()) 2482894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DCI.AddToWorklist(SH.getNode()); 2483894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0.getOperand(0), SH, Cond); 2484894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2485894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2486894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2487894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2488894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N1.getOpcode() == ISD::ADD || N1.getOpcode() == ISD::SUB || 2489894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N1.getOpcode() == ISD::XOR) { 2490894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Simplify X == (X+Z) --> Z == 0 2491894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N1.getOperand(0) == N0) { 2492894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N1.getOperand(1), 2493894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(0, N1.getValueType()), Cond); 2494894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (N1.getOperand(1) == N0) { 2495894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (DAG.isCommutativeBinOp(N1.getOpcode())) { 2496894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N1.getOperand(0), 2497894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(0, N1.getValueType()), Cond); 2498894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (N1.getNode()->hasOneUse()) { 2499894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(N1.getOpcode() == ISD::SUB && "Unexpected operation!"); 2500894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // X == (Z-X) --> X<<1 == Z 250119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue SH = DAG.getNode(ISD::SHL, dl, N1.getValueType(), N0, 250219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DAG.getConstant(1, getShiftAmountTy(N0.getValueType()))); 2503894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!DCI.isCalledByLegalizer()) 2504894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DCI.AddToWorklist(SH.getNode()); 2505894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, SH, N1.getOperand(0), Cond); 2506894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2507894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2508894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2509894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2510894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Simplify x&y == y to x&y != 0 if y has exactly one bit set. 2511894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Note that where y is variable and is known to have at most 2512894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // one bit set (for example, if it is z&1) we cannot do this; 2513894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // the expressions are not equivalent when y==0. 2514894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOpcode() == ISD::AND) 2515894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getOperand(0) == N1 || N0.getOperand(1) == N1) { 2516894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ValueHasExactlyOneBitSet(N1, DAG)) { 2517894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond = ISD::getSetCCInverse(Cond, /*isInteger=*/true); 2518894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue Zero = DAG.getConstant(0, N1.getValueType()); 2519894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N0, Zero, Cond); 2520894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2521894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2522894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N1.getOpcode() == ISD::AND) 2523894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N1.getOperand(0) == N0 || N1.getOperand(1) == N0) { 2524894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ValueHasExactlyOneBitSet(N0, DAG)) { 2525894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Cond = ISD::getSetCCInverse(Cond, /*isInteger=*/true); 2526894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue Zero = DAG.getConstant(0, N0.getValueType()); 2527894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getSetCC(dl, VT, N1, Zero, Cond); 2528894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2529894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2530894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2531894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2532894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Fold away ALL boolean setcc's. 2533894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue Temp; 2534894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N0.getValueType() == MVT::i1 && foldBooleans) { 2535894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (Cond) { 2536894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: llvm_unreachable("Unknown integer setcc!"); 2537894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETEQ: // X == Y -> ~(X^Y) 2538894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Temp = DAG.getNode(ISD::XOR, dl, MVT::i1, N0, N1); 2539894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0 = DAG.getNOT(dl, Temp, MVT::i1); 2540894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!DCI.isCalledByLegalizer()) 2541894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DCI.AddToWorklist(Temp.getNode()); 2542894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 2543894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETNE: // X != Y --> (X^Y) 2544894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0 = DAG.getNode(ISD::XOR, dl, MVT::i1, N0, N1); 2545894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 2546894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETGT: // X >s Y --> X == 0 & Y == 1 --> ~X & Y 2547894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETULT: // X <u Y --> X == 0 & Y == 1 --> ~X & Y 2548894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Temp = DAG.getNOT(dl, N0, MVT::i1); 2549894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0 = DAG.getNode(ISD::AND, dl, MVT::i1, N1, Temp); 2550894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!DCI.isCalledByLegalizer()) 2551894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DCI.AddToWorklist(Temp.getNode()); 2552894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 2553894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETLT: // X <s Y --> X == 1 & Y == 0 --> ~Y & X 2554894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETUGT: // X >u Y --> X == 1 & Y == 0 --> ~Y & X 2555894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Temp = DAG.getNOT(dl, N1, MVT::i1); 2556894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0 = DAG.getNode(ISD::AND, dl, MVT::i1, N0, Temp); 2557894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!DCI.isCalledByLegalizer()) 2558894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DCI.AddToWorklist(Temp.getNode()); 2559894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 2560894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETULE: // X <=u Y --> X == 0 | Y == 1 --> ~X | Y 2561894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETGE: // X >=s Y --> X == 0 | Y == 1 --> ~X | Y 2562894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Temp = DAG.getNOT(dl, N0, MVT::i1); 2563894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0 = DAG.getNode(ISD::OR, dl, MVT::i1, N1, Temp); 2564894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!DCI.isCalledByLegalizer()) 2565894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DCI.AddToWorklist(Temp.getNode()); 2566894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 2567894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETUGE: // X >=u Y --> X == 1 | Y == 0 --> ~Y | X 2568894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case ISD::SETLE: // X <=s Y --> X == 1 | Y == 0 --> ~Y | X 2569894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Temp = DAG.getNOT(dl, N1, MVT::i1); 2570894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0 = DAG.getNode(ISD::OR, dl, MVT::i1, N0, Temp); 2571894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 2572894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2573894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (VT != MVT::i1) { 2574894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!DCI.isCalledByLegalizer()) 2575894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DCI.AddToWorklist(N0.getNode()); 2576894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: If running after legalize, we probably can't do this. 2577894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, VT, N0); 2578894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2579894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return N0; 2580894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2581894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2582894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Could not fold it. 2583894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SDValue(); 2584894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2585894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2586894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// isGAPlusOffset - Returns true (and the GlobalValue and the offset) if the 2587894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// node is a GlobalAddress + offset. 258819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool TargetLowering::isGAPlusOffset(SDNode *N, const GlobalValue *&GA, 2589894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t &Offset) const { 2590894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (isa<GlobalAddressSDNode>(N)) { 2591894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman GlobalAddressSDNode *GASD = cast<GlobalAddressSDNode>(N); 2592894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman GA = GASD->getGlobal(); 2593894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Offset += GASD->getOffset(); 2594894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 2595894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2596894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2597894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (N->getOpcode() == ISD::ADD) { 2598894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue N1 = N->getOperand(0); 2599894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue N2 = N->getOperand(1); 2600894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (isGAPlusOffset(N1.getNode(), GA, Offset)) { 2601894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ConstantSDNode *V = dyn_cast<ConstantSDNode>(N2); 2602894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (V) { 2603894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Offset += V->getSExtValue(); 2604894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 2605894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2606894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else if (isGAPlusOffset(N2.getNode(), GA, Offset)) { 2607894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ConstantSDNode *V = dyn_cast<ConstantSDNode>(N1); 2608894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (V) { 2609894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Offset += V->getSExtValue(); 2610894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 2611894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2612894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2613894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 261419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2615894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 2616894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2617894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2618894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2619894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanSDValue TargetLowering:: 2620894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanPerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const { 2621894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Default implementation: no optimization. 2622894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SDValue(); 2623894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2624894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2625894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 2626894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// Inline Assembler Implementation Methods 2627894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 2628894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2629894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2630894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanTargetLowering::ConstraintType 2631894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanTargetLowering::getConstraintType(const std::string &Constraint) const { 2632894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Constraint.size() == 1) { 2633894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (Constraint[0]) { 2634894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: break; 2635894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'r': return C_RegisterClass; 2636894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'm': // memory 2637894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'o': // offsetable 2638894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'V': // not offsetable 2639894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return C_Memory; 2640894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'i': // Simple Integer or Relocatable Constant 2641894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'n': // Simple Integer 264219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'E': // Floating Point Constant 264319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'F': // Floating Point Constant 2644894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 's': // Relocatable Constant 264519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'p': // Address. 2646894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'X': // Allow ANY value. 2647894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'I': // Target registers. 2648894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'J': 2649894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'K': 2650894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'L': 2651894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'M': 2652894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'N': 2653894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'O': 2654894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'P': 265519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case '<': 265619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case '>': 2657894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return C_Other; 2658894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2659894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 266019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 266119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Constraint.size() > 1 && Constraint[0] == '{' && 2662894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Constraint[Constraint.size()-1] == '}') 2663894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return C_Register; 2664894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return C_Unknown; 2665894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2666894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2667894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// LowerXConstraint - try to replace an X constraint, which matches anything, 2668894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// with another that has more specific requirements based on the type of the 2669894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// corresponding operand. 2670894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanconst char *TargetLowering::LowerXConstraint(EVT ConstraintVT) const{ 2671894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstraintVT.isInteger()) 2672894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return "r"; 2673894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstraintVT.isFloatingPoint()) 2674894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return "f"; // works for many targets 2675894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 0; 2676894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2677894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2678894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// LowerAsmOperandForConstraint - Lower the specified operand into the Ops 2679894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// vector. If it is invalid, don't add anything to Ops. 2680894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanvoid TargetLowering::LowerAsmOperandForConstraint(SDValue Op, 268119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman std::string &Constraint, 2682894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::vector<SDValue> &Ops, 2683894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SelectionDAG &DAG) const { 268419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 268519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Constraint.length() > 1) return; 268619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 268719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman char ConstraintLetter = Constraint[0]; 2688894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (ConstraintLetter) { 2689894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: break; 2690894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'X': // Allows any operand; labels (basic block) use this. 2691894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Op.getOpcode() == ISD::BasicBlock) { 2692894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Ops.push_back(Op); 2693894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return; 2694894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2695894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // fall through 2696894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'i': // Simple Integer or Relocatable Constant 2697894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 'n': // Simple Integer 2698894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 's': { // Relocatable Constant 2699894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // These operands are interested in values of the form (GV+C), where C may 2700894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // be folded in as an offset of GV, or it may be explicitly added. Also, it 2701894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // is possible and fine if either GV or C are missing. 2702894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op); 2703894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman GlobalAddressSDNode *GA = dyn_cast<GlobalAddressSDNode>(Op); 270419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2705894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If we have "(add GV, C)", pull out GV/C 2706894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Op.getOpcode() == ISD::ADD) { 2707894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman C = dyn_cast<ConstantSDNode>(Op.getOperand(1)); 2708894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman GA = dyn_cast<GlobalAddressSDNode>(Op.getOperand(0)); 2709894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (C == 0 || GA == 0) { 2710894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman C = dyn_cast<ConstantSDNode>(Op.getOperand(0)); 2711894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman GA = dyn_cast<GlobalAddressSDNode>(Op.getOperand(1)); 2712894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2713894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (C == 0 || GA == 0) 2714894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman C = 0, GA = 0; 2715894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 271619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2717894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If we find a valid operand, map to the TargetXXX version so that the 2718894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // value itself doesn't get selected. 2719894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (GA) { // Either &GV or &GV+C 2720894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstraintLetter != 'n') { 2721894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int64_t Offs = GA->getOffset(); 2722894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (C) Offs += C->getZExtValue(); 272319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Ops.push_back(DAG.getTargetGlobalAddress(GA->getGlobal(), 2724894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman C ? C->getDebugLoc() : DebugLoc(), 2725894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Op.getValueType(), Offs)); 2726894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return; 2727894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2728894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2729894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (C) { // just C, no GV. 2730894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Simple constants are not allowed for 's'. 2731894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (ConstraintLetter != 's') { 2732894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // gcc prints these as sign extended. Sign extend value to 64 bits 2733894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // now; without this it would get ZExt'd later in 2734894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // ScheduleDAGSDNodes::EmitNode, which is very generic. 2735894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Ops.push_back(DAG.getTargetConstant(C->getAPIntValue().getSExtValue(), 2736894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman MVT::i64)); 2737894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return; 2738894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2739894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2740894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 2741894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2742894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2743894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2744894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2745894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanstd::pair<unsigned, const TargetRegisterClass*> TargetLowering:: 2746894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumangetRegForInlineAsmConstraint(const std::string &Constraint, 2747894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT VT) const { 2748894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Constraint[0] != '{') 2749894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return std::make_pair(0u, static_cast<TargetRegisterClass*>(0)); 2750894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(*(Constraint.end()-1) == '}' && "Not a brace enclosed constraint?"); 2751894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2752894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Remove the braces from around the name. 2753894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman StringRef RegName(Constraint.data()+1, Constraint.size()-2); 2754894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2755894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Figure out which register class contains this reg. 2756894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const TargetRegisterInfo *RI = TM.getRegisterInfo(); 2757894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (TargetRegisterInfo::regclass_iterator RCI = RI->regclass_begin(), 2758894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman E = RI->regclass_end(); RCI != E; ++RCI) { 2759894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const TargetRegisterClass *RC = *RCI; 276019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 276119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If none of the value types for this register class are valid, we 2762894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // can't use it. For example, 64-bit reg classes on 32-bit targets. 276319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!isLegalRC(RC)) 276419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman continue; 276519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 276619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (TargetRegisterClass::iterator I = RC->begin(), E = RC->end(); 2767894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman I != E; ++I) { 2768894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (RegName.equals_lower(RI->getName(*I))) 2769894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return std::make_pair(*I, RC); 2770894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2771894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 277219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2773894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return std::make_pair(0u, static_cast<const TargetRegisterClass*>(0)); 2774894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2775894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2776894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 2777894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// Constraint Selection. 2778894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2779894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// isMatchingInputConstraint - Return true of this is an input operand that is 2780894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// a matching constraint like "4". 2781894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanbool TargetLowering::AsmOperandInfo::isMatchingInputConstraint() const { 2782894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(!ConstraintCode.empty() && "No known constraint!"); 2783894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return isdigit(ConstraintCode[0]); 2784894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2785894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2786894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getMatchedOperand - If this is an input matching constraint, this method 2787894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// returns the output operand it matches. 2788894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanunsigned TargetLowering::AsmOperandInfo::getMatchedOperand() const { 2789894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(!ConstraintCode.empty() && "No known constraint!"); 2790894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return atoi(ConstraintCode.c_str()); 2791894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2792894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 2793894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 279419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// ParseConstraints - Split up the constraint string from the inline 279519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// assembly value into the specific constraints and their prefixes, 279619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// and also tie in the associated operand values. 279719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// If this returns an empty vector, and if the constraint string itself 279819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// isn't empty, there was an error parsing. 279919bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanTargetLowering::AsmOperandInfoVector TargetLowering::ParseConstraints( 280019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ImmutableCallSite CS) const { 280119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman /// ConstraintOperands - Information about all of the constraints. 280219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AsmOperandInfoVector ConstraintOperands; 280319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const InlineAsm *IA = cast<InlineAsm>(CS.getCalledValue()); 280419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned maCount = 0; // Largest number of multiple alternative constraints. 280519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 280619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Do a prepass over the constraints, canonicalizing them, and building up the 280719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // ConstraintOperands list. 280819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman InlineAsm::ConstraintInfoVector 280919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ConstraintInfos = IA->ParseConstraints(); 281019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 281119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned ArgNo = 0; // ArgNo - The argument of the CallInst. 281219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned ResNo = 0; // ResNo - The result number of the next output. 281319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 281419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (unsigned i = 0, e = ConstraintInfos.size(); i != e; ++i) { 281519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ConstraintOperands.push_back(AsmOperandInfo(ConstraintInfos[i])); 281619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AsmOperandInfo &OpInfo = ConstraintOperands.back(); 281719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 281819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Update multiple alternative constraint count. 281919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (OpInfo.multipleAlternatives.size() > maCount) 282019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman maCount = OpInfo.multipleAlternatives.size(); 282119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 282219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OpInfo.ConstraintVT = MVT::Other; 282319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 282419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Compute the value type for each operand. 282519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman switch (OpInfo.Type) { 282619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case InlineAsm::isOutput: 282719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Indirect outputs just consume an argument. 282819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (OpInfo.isIndirect) { 282919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OpInfo.CallOperandVal = const_cast<Value *>(CS.getArgument(ArgNo++)); 283019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 283119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 283219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 283319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // The return value of the call is this value. As such, there is no 283419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // corresponding argument. 283519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert(!CS.getType()->isVoidTy() && 283619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman "Bad inline asm!"); 283719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (StructType *STy = dyn_cast<StructType>(CS.getType())) { 283819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OpInfo.ConstraintVT = getValueType(STy->getElementType(ResNo)); 283919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else { 284019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert(ResNo == 0 && "Asm only has one result!"); 284119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OpInfo.ConstraintVT = getValueType(CS.getType()); 284219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 284319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ++ResNo; 284419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 284519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case InlineAsm::isInput: 284619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OpInfo.CallOperandVal = const_cast<Value *>(CS.getArgument(ArgNo++)); 284719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 284819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case InlineAsm::isClobber: 284919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Nothing to do. 285019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 285119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 285219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 285319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (OpInfo.CallOperandVal) { 285419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman llvm::Type *OpTy = OpInfo.CallOperandVal->getType(); 285519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (OpInfo.isIndirect) { 285619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman llvm::PointerType *PtrTy = dyn_cast<PointerType>(OpTy); 285719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!PtrTy) 285819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman report_fatal_error("Indirect operand for inline asm not a pointer!"); 285919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OpTy = PtrTy->getElementType(); 286019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 286119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 286219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Look for vector wrapped in a struct. e.g. { <16 x i8> }. 286319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (StructType *STy = dyn_cast<StructType>(OpTy)) 286419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (STy->getNumElements() == 1) 286519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OpTy = STy->getElementType(0); 286619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 286719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If OpTy is not a single value, it may be a struct/union that we 286819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // can tile with integers. 286919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (!OpTy->isSingleValueType() && OpTy->isSized()) { 287019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned BitSize = TD->getTypeSizeInBits(OpTy); 287119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman switch (BitSize) { 287219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman default: break; 287319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 1: 287419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 8: 287519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 16: 287619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 32: 287719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 64: 287819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 128: 287919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OpInfo.ConstraintVT = 288019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman EVT::getEVT(IntegerType::get(OpTy->getContext(), BitSize), true); 288119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 288219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 288319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else if (dyn_cast<PointerType>(OpTy)) { 288419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OpInfo.ConstraintVT = MVT::getIntegerVT(8*TD->getPointerSize()); 288519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } else { 288619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman OpInfo.ConstraintVT = EVT::getEVT(OpTy, true); 288719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 288819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 288919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 289019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 289119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If we have multiple alternative constraints, select the best alternative. 289219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ConstraintInfos.size()) { 289319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (maCount) { 289419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned bestMAIndex = 0; 289519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int bestWeight = -1; 289619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // weight: -1 = invalid match, and 0 = so-so match to 5 = good match. 289719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int weight = -1; 289819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned maIndex; 289919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Compute the sums of the weights for each alternative, keeping track 290019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // of the best (highest weight) one so far. 290119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (maIndex = 0; maIndex < maCount; ++maIndex) { 290219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman int weightSum = 0; 290319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (unsigned cIndex = 0, eIndex = ConstraintOperands.size(); 290419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman cIndex != eIndex; ++cIndex) { 290519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AsmOperandInfo& OpInfo = ConstraintOperands[cIndex]; 290619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (OpInfo.Type == InlineAsm::isClobber) 290719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman continue; 290819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 290919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If this is an output operand with a matching input operand, 291019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // look up the matching input. If their types mismatch, e.g. one 291119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // is an integer, the other is floating point, or their sizes are 291219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // different, flag it as an maCantMatch. 291319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (OpInfo.hasMatchingInput()) { 291419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AsmOperandInfo &Input = ConstraintOperands[OpInfo.MatchingInput]; 291519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (OpInfo.ConstraintVT != Input.ConstraintVT) { 291619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if ((OpInfo.ConstraintVT.isInteger() != 291719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Input.ConstraintVT.isInteger()) || 291819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman (OpInfo.ConstraintVT.getSizeInBits() != 291919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Input.ConstraintVT.getSizeInBits())) { 292019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman weightSum = -1; // Can't match. 292119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 292219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 292319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 292419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 292519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman weight = getMultipleConstraintMatchWeight(OpInfo, maIndex); 292619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (weight == -1) { 292719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman weightSum = -1; 292819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 292919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 293019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman weightSum += weight; 293119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 293219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Update best. 293319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (weightSum > bestWeight) { 293419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bestWeight = weightSum; 293519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman bestMAIndex = maIndex; 293619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 293719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 293819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 293919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Now select chosen alternative in each constraint. 294019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (unsigned cIndex = 0, eIndex = ConstraintOperands.size(); 294119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman cIndex != eIndex; ++cIndex) { 294219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AsmOperandInfo& cInfo = ConstraintOperands[cIndex]; 294319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (cInfo.Type == InlineAsm::isClobber) 294419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman continue; 294519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman cInfo.selectAlternative(bestMAIndex); 294619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 294719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 294819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 294919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 295019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Check and hook up tied operands, choose constraint code to use. 295119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (unsigned cIndex = 0, eIndex = ConstraintOperands.size(); 295219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman cIndex != eIndex; ++cIndex) { 295319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AsmOperandInfo& OpInfo = ConstraintOperands[cIndex]; 295419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 295519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If this is an output operand with a matching input operand, look up the 295619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // matching input. If their types mismatch, e.g. one is an integer, the 295719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // other is floating point, or their sizes are different, flag it as an 295819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // error. 295919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (OpInfo.hasMatchingInput()) { 296019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AsmOperandInfo &Input = ConstraintOperands[OpInfo.MatchingInput]; 296119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 296219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (OpInfo.ConstraintVT != Input.ConstraintVT) { 296319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman std::pair<unsigned, const TargetRegisterClass*> MatchRC = 296419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getRegForInlineAsmConstraint(OpInfo.ConstraintCode, OpInfo.ConstraintVT); 296519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman std::pair<unsigned, const TargetRegisterClass*> InputRC = 296619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getRegForInlineAsmConstraint(Input.ConstraintCode, Input.ConstraintVT); 296719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if ((OpInfo.ConstraintVT.isInteger() != 296819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Input.ConstraintVT.isInteger()) || 296919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman (MatchRC.second != InputRC.second)) { 297019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman report_fatal_error("Unsupported asm: input constraint" 297119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman " with a matching output constraint of" 297219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman " incompatible type!"); 297319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 297419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 297519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 297619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 297719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 297819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 297919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return ConstraintOperands; 298019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 298119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 298219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 2983894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// getConstraintGenerality - Return an integer indicating how general CT 2984894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// is. 2985894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanstatic unsigned getConstraintGenerality(TargetLowering::ConstraintType CT) { 2986894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (CT) { 2987894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman default: llvm_unreachable("Unknown constraint type!"); 2988894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case TargetLowering::C_Other: 2989894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case TargetLowering::C_Unknown: 2990894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 0; 2991894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case TargetLowering::C_Register: 2992894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 1; 2993894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case TargetLowering::C_RegisterClass: 2994894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 2; 2995894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case TargetLowering::C_Memory: 2996894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return 3; 2997894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 2998894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 2999894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 300019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// Examine constraint type and operand type and determine a weight value. 300119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// This object must already have been set up with the operand type 300219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// and the current alternative constraint selected. 300319bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanTargetLowering::ConstraintWeight 300419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TargetLowering::getMultipleConstraintMatchWeight( 300519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AsmOperandInfo &info, int maIndex) const { 300619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman InlineAsm::ConstraintCodeVector *rCodes; 300719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (maIndex >= (int)info.multipleAlternatives.size()) 300819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman rCodes = &info.Codes; 300919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman else 301019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman rCodes = &info.multipleAlternatives[maIndex].Codes; 301119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ConstraintWeight BestWeight = CW_Invalid; 301219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 301319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Loop over the options, keeping track of the most general one. 301419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman for (unsigned i = 0, e = rCodes->size(); i != e; ++i) { 301519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ConstraintWeight weight = 301619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getSingleConstraintMatchWeight(info, (*rCodes)[i].c_str()); 301719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (weight > BestWeight) 301819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman BestWeight = weight; 301919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 302019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 302119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return BestWeight; 302219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 302319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 302419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// Examine constraint type and operand type and determine a weight value. 302519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// This object must already have been set up with the operand type 302619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// and the current alternative constraint selected. 302719bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanTargetLowering::ConstraintWeight 302819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TargetLowering::getSingleConstraintMatchWeight( 302919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman AsmOperandInfo &info, const char *constraint) const { 303019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ConstraintWeight weight = CW_Invalid; 303119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Value *CallOperandVal = info.CallOperandVal; 303219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If we don't have a value, we can't do a match, 303319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // but allow it at the lowest weight. 303419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (CallOperandVal == NULL) 303519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return CW_Default; 303619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Look at the constraint type. 303719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman switch (*constraint) { 303819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'i': // immediate integer. 303919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'n': // immediate integer with a known value. 304019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (isa<ConstantInt>(CallOperandVal)) 304119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman weight = CW_Constant; 304219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 304319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 's': // non-explicit intregal immediate. 304419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (isa<GlobalValue>(CallOperandVal)) 304519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman weight = CW_Constant; 304619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 304719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'E': // immediate float if host format. 304819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'F': // immediate float. 304919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (isa<ConstantFP>(CallOperandVal)) 305019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman weight = CW_Constant; 305119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 305219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case '<': // memory operand with autodecrement. 305319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case '>': // memory operand with autoincrement. 305419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'm': // memory operand. 305519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'o': // offsettable memory operand 305619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'V': // non-offsettable memory operand 305719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman weight = CW_Memory; 305819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 305919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'r': // general register. 306019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'g': // general register, memory operand or immediate integer. 306119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // note: Clang converts "g" to "imr". 306219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (CallOperandVal->getType()->isIntegerTy()) 306319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman weight = CW_Register; 306419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 306519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman case 'X': // any operand. 306619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman default: 306719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman weight = CW_Default; 306819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman break; 306919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 307019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return weight; 307119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 307219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3073894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ChooseConstraint - If there are multiple different constraints that we 3074894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// could pick for this operand (e.g. "imr") try to pick the 'best' one. 3075894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// This is somewhat tricky: constraints fall into four classes: 3076894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// Other -> immediates and magic values 3077894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// Register -> one specific register 3078894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// RegisterClass -> a group of regs 3079894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// Memory -> memory 3080894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// Ideally, we would pick the most specific constraint possible: if we have 3081894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// something that fits into a register, we would pick it. The problem here 3082894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// is that if we have something that could either be in a register or in 3083894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// memory that use of the register could cause selection of *other* 3084894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// operands to fail: they might only succeed if we pick memory. Because of 3085894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// this the heuristic we use is: 3086894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 3087894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 1) If there is an 'other' constraint, and if the operand is valid for 3088894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// that constraint, use it. This makes us take advantage of 'i' 3089894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// constraints when available. 3090894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 2) Otherwise, pick the most general constraint present. This prefers 3091894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 'm' over 'r', for example. 3092894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// 3093894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanstatic void ChooseConstraint(TargetLowering::AsmOperandInfo &OpInfo, 3094894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman const TargetLowering &TLI, 3095894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue Op, SelectionDAG *DAG) { 3096894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(OpInfo.Codes.size() > 1 && "Doesn't have multiple constraint options"); 3097894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman unsigned BestIdx = 0; 3098894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TargetLowering::ConstraintType BestType = TargetLowering::C_Unknown; 3099894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int BestGenerality = -1; 3100894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 3101894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Loop over the options, keeping track of the most general one. 3102894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman for (unsigned i = 0, e = OpInfo.Codes.size(); i != e; ++i) { 3103894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TargetLowering::ConstraintType CType = 3104894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman TLI.getConstraintType(OpInfo.Codes[i]); 3105894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 3106894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If this is an 'other' constraint, see if the operand is valid for it. 3107894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // For example, on X86 we might have an 'rI' constraint. If the operand 3108894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // is an integer in the range [0..31] we want to use I (saving a load 3109894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // of a register), otherwise we must use 'r'. 3110894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (CType == TargetLowering::C_Other && Op.getNode()) { 3111894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(OpInfo.Codes[i].size() == 1 && 3112894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "Unhandled multi-letter 'other' constraint"); 3113894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::vector<SDValue> ResultOps; 311419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman TLI.LowerAsmOperandForConstraint(Op, OpInfo.Codes[i], 3115894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ResultOps, *DAG); 3116894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!ResultOps.empty()) { 3117894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman BestType = CType; 3118894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman BestIdx = i; 3119894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 3120894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 3121894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 312219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3123894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Things with matching constraints can only be registers, per gcc 3124894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // documentation. This mainly affects "g" constraints. 3125894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (CType == TargetLowering::C_Memory && OpInfo.hasMatchingInput()) 3126894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman continue; 312719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3128894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // This constraint letter is more general than the previous one, use it. 3129894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman int Generality = getConstraintGenerality(CType); 3130894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Generality > BestGenerality) { 3131894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman BestType = CType; 3132894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman BestIdx = i; 3133894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman BestGenerality = Generality; 3134894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 3135894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 313619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3137894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman OpInfo.ConstraintCode = OpInfo.Codes[BestIdx]; 3138894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman OpInfo.ConstraintType = BestType; 3139894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 3140894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 3141894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// ComputeConstraintToUse - Determines the constraint code and constraint 3142894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// type to use for the specific AsmOperandInfo, setting 3143894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// OpInfo.ConstraintCode and OpInfo.ConstraintType. 3144894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Baumanvoid TargetLowering::ComputeConstraintToUse(AsmOperandInfo &OpInfo, 314519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue Op, 3146894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SelectionDAG *DAG) const { 3147894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman assert(!OpInfo.Codes.empty() && "Must have at least one constraint"); 314819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3149894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Single-letter constraints ('r') are very common. 3150894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (OpInfo.Codes.size() == 1) { 3151894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman OpInfo.ConstraintCode = OpInfo.Codes[0]; 3152894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman OpInfo.ConstraintType = getConstraintType(OpInfo.ConstraintCode); 3153894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { 3154894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman ChooseConstraint(OpInfo, *this, Op, DAG); 3155894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 315619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3157894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // 'X' matches anything. 3158894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (OpInfo.ConstraintCode == "X" && OpInfo.CallOperandVal) { 3159894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Labels and constants are handled elsewhere ('X' is the only thing 3160894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // that matches labels). For Functions, the type here is the type of 3161894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // the result, which is not what we want to look at; leave them alone. 3162894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Value *v = OpInfo.CallOperandVal; 3163894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (isa<BasicBlock>(v) || isa<ConstantInt>(v) || isa<Function>(v)) { 3164894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman OpInfo.CallOperandVal = v; 3165894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return; 3166894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 316719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3168894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise, try to resolve it to something we know about by looking at 3169894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // the actual operand type. 3170894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (const char *Repl = LowerXConstraint(OpInfo.ConstraintVT)) { 3171894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman OpInfo.ConstraintCode = Repl; 3172894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman OpInfo.ConstraintType = getConstraintType(OpInfo.ConstraintCode); 3173894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 3174894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 3175894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 3176894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 3177894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 3178894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman// Loop Strength Reduction hooks 3179894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman//===----------------------------------------------------------------------===// 3180894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 3181894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// isLegalAddressingMode - Return true if the addressing mode represented 3182894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// by AM is legal for this target, for a load/store of the specified type. 318319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Baumanbool TargetLowering::isLegalAddressingMode(const AddrMode &AM, 318419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Type *Ty) const { 3185894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // The default implementation of this implements a conservative RISCy, r+r and 3186894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // r+i addr mode. 3187894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 3188894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Allows a sign-extended 16-bit immediate field. 3189894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (AM.BaseOffs <= -(1LL << 16) || AM.BaseOffs >= (1LL << 16)-1) 3190894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 319119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3192894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // No global is ever allowed as a base. 3193894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (AM.BaseGV) 3194894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 319519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 319619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Only support r+r, 3197894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman switch (AM.Scale) { 3198894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 0: // "r+i" or just "i", depending on HasBaseReg. 3199894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 3200894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 1: 3201894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (AM.HasBaseReg && AM.BaseOffs) // "r+r+i" is not allowed. 3202894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 3203894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Otherwise we have r+r or r+i. 3204894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 3205894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman case 2: 3206894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (AM.HasBaseReg || AM.BaseOffs) // 2*r+r or 2*r+i is not allowed. 3207894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return false; 3208894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Allow 2*r as r+r. 3209894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman break; 3210894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 321119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3212894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return true; 3213894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 3214894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 321519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// BuildExactDiv - Given an exact SDIV by a constant, create a multiplication 321619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman/// with the multiplicative inverse of the constant. 321719bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanSDValue TargetLowering::BuildExactSDIV(SDValue Op1, SDValue Op2, DebugLoc dl, 321819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SelectionDAG &DAG) const { 321919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman ConstantSDNode *C = cast<ConstantSDNode>(Op2); 322019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APInt d = C->getAPIntValue(); 322119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert(d != 0 && "Division by zero!"); 322219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 322319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Shift the value upfront if it is even, so the LSB is one. 322419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned ShAmt = d.countTrailingZeros(); 322519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (ShAmt) { 322619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // TODO: For UDIV use SRL instead of SRA. 322719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue Amt = DAG.getConstant(ShAmt, getShiftAmountTy(Op1.getValueType())); 322819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Op1 = DAG.getNode(ISD::SRA, dl, Op1.getValueType(), Op1, Amt); 322919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman d = d.ashr(ShAmt); 323019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 323119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 323219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Calculate the multiplicative inverse, using Newton's method. 323319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APInt t, xn = d; 323419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman while ((t = d*xn) != 1) 323519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman xn *= APInt(d.getBitWidth(), 2) - t; 323619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 323719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Op2 = DAG.getConstant(xn, Op1.getValueType()); 323819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getNode(ISD::MUL, dl, Op1.getValueType(), Op1, Op2); 323919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman} 324019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3241894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// BuildSDIVSequence - Given an ISD::SDIV node expressing a divide by constant, 3242894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// return a DAG expression to select that will generate the same value by 3243894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// multiplying by a magic number. See: 3244894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// <http://the.wall.riscom.net/books/proc/ppc/cwg/code2.html> 324519bac1e08be200c31efd26f0f5fd144c9b3eefd3John BaumanSDValue TargetLowering::BuildSDIV(SDNode *N, SelectionDAG &DAG, 3246894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::vector<SDNode*>* Created) const { 3247894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT VT = N->getValueType(0); 3248894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DebugLoc dl= N->getDebugLoc(); 324919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3250894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Check to see if we can do this. 3251894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: We should be more aggressive here. 3252894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!isTypeLegal(VT)) 3253894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SDValue(); 325419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3255894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt d = cast<ConstantSDNode>(N->getOperand(1))->getAPIntValue(); 3256894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman APInt::ms magics = d.magic(); 325719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 3258894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Multiply the numerator (operand 0) by the magic value 3259894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: We should support doing a MUL in a wider type 3260894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue Q; 3261894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (isOperationLegalOrCustom(ISD::MULHS, VT)) 3262894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Q = DAG.getNode(ISD::MULHS, dl, VT, N->getOperand(0), 3263894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(magics.m, VT)); 3264894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (isOperationLegalOrCustom(ISD::SMUL_LOHI, VT)) 3265894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Q = SDValue(DAG.getNode(ISD::SMUL_LOHI, dl, DAG.getVTList(VT, VT), 3266894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman N->getOperand(0), 3267894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getConstant(magics.m, VT)).getNode(), 1); 3268894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else 3269894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SDValue(); // No mulhs or equvialent 3270894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If d > 0 and m < 0, add the numerator 327119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (d.isStrictlyPositive() && magics.m.isNegative()) { 3272894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Q = DAG.getNode(ISD::ADD, dl, VT, Q, N->getOperand(0)); 3273894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Created) 3274894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Created->push_back(Q.getNode()); 3275894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 3276894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // If d < 0 and m > 0, subtract the numerator. 3277894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (d.isNegative() && magics.m.isStrictlyPositive()) { 3278894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Q = DAG.getNode(ISD::SUB, dl, VT, Q, N->getOperand(0)); 3279894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Created) 3280894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Created->push_back(Q.getNode()); 3281894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 3282894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Shift right algebraic if shift value is nonzero 3283894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (magics.s > 0) { 328419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Q = DAG.getNode(ISD::SRA, dl, VT, Q, 328519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DAG.getConstant(magics.s, getShiftAmountTy(Q.getValueType()))); 3286894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Created) 3287894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Created->push_back(Q.getNode()); 3288894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 3289894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Extract the sign bit and add it to the quotient 3290894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue T = 3291894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DAG.getNode(ISD::SRL, dl, VT, Q, DAG.getConstant(VT.getSizeInBits()-1, 329219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman getShiftAmountTy(Q.getValueType()))); 3293894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Created) 3294894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Created->push_back(T.getNode()); 3295894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return DAG.getNode(ISD::ADD, dl, VT, Q, T); 3296894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 3297894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 3298894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// BuildUDIVSequence - Given an ISD::UDIV node expressing a divide by constant, 3299894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// return a DAG expression to select that will generate the same value by 3300894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// multiplying by a magic number. See: 3301894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman/// <http://the.wall.riscom.net/books/proc/ppc/cwg/code2.html> 3302894018228b0e0bdbd7aa7e8f47d4a9458789ca82John BaumanSDValue TargetLowering::BuildUDIV(SDNode *N, SelectionDAG &DAG, 3303894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman std::vector<SDNode*>* Created) const { 3304894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman EVT VT = N->getValueType(0); 3305894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman DebugLoc dl = N->getDebugLoc(); 3306894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 3307894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Check to see if we can do this. 3308894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: We should be more aggressive here. 3309894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (!isTypeLegal(VT)) 3310894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SDValue(); 3311894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 3312894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: We should use a narrower constant when the upper 3313894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // bits are known to be zero. 331419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman const APInt &N1C = cast<ConstantSDNode>(N->getOperand(1))->getAPIntValue(); 331519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman APInt::mu magics = N1C.magicu(); 331619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 331719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman SDValue Q = N->getOperand(0); 331819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 331919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // If the divisor is even, we can avoid using the expensive fixup by shifting 332019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // the divided value upfront. 332119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (magics.a != 0 && !N1C[0]) { 332219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman unsigned Shift = N1C.countTrailingZeros(); 332319bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Q = DAG.getNode(ISD::SRL, dl, VT, Q, 332419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DAG.getConstant(Shift, getShiftAmountTy(Q.getValueType()))); 332519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman if (Created) 332619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Created->push_back(Q.getNode()); 332719bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman 332819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman // Get magic number for the shifted divisor. 332919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman magics = N1C.lshr(Shift).magicu(Shift); 333019bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert(magics.a == 0 && "Should use cheap fixup now"); 333119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman } 3332894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 3333894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // Multiply the numerator (operand 0) by the magic value 3334894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman // FIXME: We should support doing a MUL in a wider type 3335894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (isOperationLegalOrCustom(ISD::MULHU, VT)) 333619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Q = DAG.getNode(ISD::MULHU, dl, VT, Q, DAG.getConstant(magics.m, VT)); 3337894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else if (isOperationLegalOrCustom(ISD::UMUL_LOHI, VT)) 333819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman Q = SDValue(DAG.getNode(ISD::UMUL_LOHI, dl, DAG.getVTList(VT, VT), Q, 333919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DAG.getConstant(magics.m, VT)).getNode(), 1); 3340894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman else 3341894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman return SDValue(); // No mulhu or equvialent 3342894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Created) 3343894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Created->push_back(Q.getNode()); 3344894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman 3345894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (magics.a == 0) { 334619bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman assert(magics.s < N1C.getBitWidth() && 3347894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman "We shouldn't generate an undefined shift!"); 334819bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getNode(ISD::SRL, dl, VT, Q, 334919bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DAG.getConstant(magics.s, getShiftAmountTy(Q.getValueType()))); 3350894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } else { 3351894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman SDValue NPQ = DAG.getNode(ISD::SUB, dl, VT, N->getOperand(0), Q); 3352894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Created) 3353894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Created->push_back(NPQ.getNode()); 335419bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman NPQ = DAG.getNode(ISD::SRL, dl, VT, NPQ, 335519bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DAG.getConstant(1, getShiftAmountTy(NPQ.getValueType()))); 3356894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Created) 3357894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Created->push_back(NPQ.getNode()); 3358894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman NPQ = DAG.getNode(ISD::ADD, dl, VT, NPQ, Q); 3359894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman if (Created) 3360894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman Created->push_back(NPQ.getNode()); 336119bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman return DAG.getNode(ISD::SRL, dl, VT, NPQ, 336219bac1e08be200c31efd26f0f5fd144c9b3eefd3John Bauman DAG.getConstant(magics.s-1, getShiftAmountTy(NPQ.getValueType()))); 3363894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman } 3364894018228b0e0bdbd7aa7e8f47d4a9458789ca82John Bauman} 3365