SelectionDAGISel.cpp revision 7436b57de32333cc337b8c7cea208c8863eee793
11c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===-- SelectionDAGISel.cpp - Implement the SelectionDAGISel class -------===// 2edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman// 31c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// The LLVM Compiler Infrastructure 41c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// 51c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// This file was developed by the LLVM research group and is distributed under 61c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// the University of Illinois Open Source License. See LICENSE.TXT for details. 7edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman// 81c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===----------------------------------------------------------------------===// 91c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// 101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// This implements the SelectionDAGISel class. 111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner// 121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===----------------------------------------------------------------------===// 131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#define DEBUG_TYPE "isel" 151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/SelectionDAGISel.h" 16adf6a965a321372c640845407195594835921eb4Chris Lattner#include "llvm/CallingConv.h" 171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Constants.h" 181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/DerivedTypes.h" 191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Function.h" 201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Instructions.h" 211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Intrinsics.h" 221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineFunction.h" 231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineFrameInfo.h" 241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/MachineInstrBuilder.h" 251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/SelectionDAG.h" 261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/CodeGen/SSARegMap.h" 27fa57702388f139e964befecb4b98c7dfe836945fChris Lattner#include "llvm/Target/MRegisterInfo.h" 281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetData.h" 291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetFrameInfo.h" 301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetInstrInfo.h" 311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetLowering.h" 321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Target/TargetMachine.h" 33495a0b51915eb763576874f29192820b731edc22Chris Lattner#include "llvm/Transforms/Utils/BasicBlockUtils.h" 347944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#include "llvm/Support/CommandLine.h" 357c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner#include "llvm/Support/MathExtras.h" 361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Support/Debug.h" 371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include <map> 381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include <iostream> 391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerusing namespace llvm; 401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 41da8abb02397d7cd62a1e16e7c534edd7096ac873Chris Lattner#ifndef NDEBUG 427944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattnerstatic cl::opt<bool> 437944d9d9957db1efe085d9df3ea89826f50029b7Chris LattnerViewDAGs("view-isel-dags", cl::Hidden, 447944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner cl::desc("Pop up a window to show isel dags as they are selected")); 457944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#else 46a639a43602cd64087a9730632fbf6f7cf7d88276Chris Lattnerstatic const bool ViewDAGs = 0; 477944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner#endif 487944d9d9957db1efe085d9df3ea89826f50029b7Chris Lattner 492300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman 501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnernamespace llvm { 511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner //===--------------------------------------------------------------------===// 521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// FunctionLoweringInfo - This contains information that is global to a 531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// function that is used when lowering a region of the function. 54f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner class FunctionLoweringInfo { 55f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner public: 561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TargetLowering &TLI; 571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Function &Fn; 581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction &MF; 591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SSARegMap *RegMap; 601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo(TargetLowering &TLI, Function &Fn,MachineFunction &MF); 621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// MBBMap - A mapping from LLVM basic blocks to their machine code entry. 641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const BasicBlock*, MachineBasicBlock *> MBBMap; 651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// ValueMap - Since we emit code for the function a basic block at a time, 671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// we must remember which virtual registers hold the values for 681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// cross-basic-block values. 691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, unsigned> ValueMap; 701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// StaticAllocaMap - Keep track of frame indices for fixed sized allocas in 721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// the entry block. This allows the allocas to be efficiently referenced 731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// anywhere in the function. 741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const AllocaInst*, int> StaticAllocaMap; 751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned MakeReg(MVT::ValueType VT) { 771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return RegMap->createVirtualRegister(TLI.getRegClassFor(VT)); 781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 79edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned CreateRegForValue(const Value *V) { 811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType VT = TLI.getValueType(V->getType()); 821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // The common case is that we will only create one register for this 831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // value. If we have that case, create and return the virtual register. 841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned NV = TLI.getNumElements(VT); 85fb849800ea2040c188365c265421ad54fbdcf219Chris Lattner if (NV == 1) { 86fb849800ea2040c188365c265421ad54fbdcf219Chris Lattner // If we are promoting this value, pick the next largest supported type. 8798e5c0e5e4c5be1b531d287d0a1373a62fe562e2Chris Lattner return MakeReg(TLI.getTypeToTransformTo(VT)); 88fb849800ea2040c188365c265421ad54fbdcf219Chris Lattner } 89edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this value is represented with multiple target registers, make sure 911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // to create enough consequtive registers of the right (smaller) type. 921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned NT = VT-1; // Find the type to use. 931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner while (TLI.getNumElements((MVT::ValueType)NT) != 1) 941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner --NT; 95edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned R = MakeReg((MVT::ValueType)NT); 971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 1; i != NV; ++i) 981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MakeReg((MVT::ValueType)NT); 991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return R; 1001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 101edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned InitializeRegForValue(const Value *V) { 1031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned &R = ValueMap[V]; 1041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(R == 0 && "Already initialized this value register!"); 1051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return R = CreateRegForValue(V); 1061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner }; 1081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// isUsedOutsideOfDefiningBlock - Return true if this instruction is used by 1111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// PHI nodes or outside of the basic block that defines it. 1121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerstatic bool isUsedOutsideOfDefiningBlock(Instruction *I) { 1131c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (isa<PHINode>(I)) return true; 1141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BasicBlock *BB = I->getParent(); 1151c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (Value::use_iterator UI = I->use_begin(), E = I->use_end(); UI != E; ++UI) 1161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (cast<Instruction>(*UI)->getParent() != BB || isa<PHINode>(*UI)) 1171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return true; 1181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return false; 1191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 121bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner/// isOnlyUsedInEntryBlock - If the specified argument is only used in the 122bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner/// entry block, return true. 123bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattnerstatic bool isOnlyUsedInEntryBlock(Argument *A) { 124bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner BasicBlock *Entry = A->getParent()->begin(); 125bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner for (Value::use_iterator UI = A->use_begin(), E = A->use_end(); UI != E; ++UI) 126bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (cast<Instruction>(*UI)->getParent() != Entry) 127bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner return false; // Use not in entry block. 128bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner return true; 129bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner} 130bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 1311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris LattnerFunctionLoweringInfo::FunctionLoweringInfo(TargetLowering &tli, 132edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman Function &fn, MachineFunction &mf) 1331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner : TLI(tli), Fn(fn), MF(mf), RegMap(MF.getSSARegMap()) { 1341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 135bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Create a vreg for each argument register that is not dead and is used 136bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // outside of the entry block for the function. 13716ce0df92717cd1474029d87efe596d000dc2caaChris Lattner for (Function::arg_iterator AI = Fn.arg_begin(), E = Fn.arg_end(); 13816ce0df92717cd1474029d87efe596d000dc2caaChris Lattner AI != E; ++AI) 139bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (!isOnlyUsedInEntryBlock(AI)) 140bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner InitializeRegForValue(AI); 1411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 142bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Initialize the mapping of values to registers. This is only set up for 143bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // instruction values that are used outside of the block that defines 144bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // them. 1452aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen Function::iterator BB = Fn.begin(), EB = Fn.end(); 1461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 1471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (AllocaInst *AI = dyn_cast<AllocaInst>(I)) 1481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (ConstantUInt *CUI = dyn_cast<ConstantUInt>(AI->getArraySize())) { 1491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = AI->getAllocatedType(); 1501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t TySize = TLI.getTargetData().getTypeSize(Ty); 151ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman unsigned Align = 152ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman std::max((unsigned)TLI.getTargetData().getTypeAlignment(Ty), 153ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman AI->getAlignment()); 154a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner 155a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // If the alignment of the value is smaller than the size of the value, 156a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // and if the size of the value is particularly small (<= 8 bytes), 157a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // round up to the size of the value for potentially better performance. 158a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // 159a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // FIXME: This could be made better with a preferred alignment hook in 160a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner // TargetData. It serves primarily to 8-byte align doubles for X86. 161a8217e3000b5b01c4a95316aef078a9d02a9a119Chris Lattner if (Align < TySize && TySize <= 8) Align = TySize; 1622dfa8192abaad8a3c29132dba50e8b85218e918cChris Lattner TySize *= CUI->getValue(); // Get total allocated size. 163d222f6ab67472fa2b2e211172a11b43905aa9445Chris Lattner if (TySize == 0) TySize = 1; // Don't create zero-sized stack objects. 1641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner StaticAllocaMap[AI] = 165f26bc8ef4827cf0023a7052b62b920b41813d473Chris Lattner MF.getFrameInfo()->CreateStackObject((unsigned)TySize, Align); 1661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1682aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (; BB != EB; ++BB) 1692aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; ++I) 1701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (!I->use_empty() && isUsedOutsideOfDefiningBlock(I)) 1711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (!isa<AllocaInst>(I) || 1721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner !StaticAllocaMap.count(cast<AllocaInst>(I))) 1731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner InitializeRegForValue(I); 1741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Create an initial MachineBasicBlock for each LLVM BasicBlock in F. This 1761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // also creates the initial PHI MachineInstrs, though none of the input 1771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // operands are populated. 1782aeaf4e839438d51766996006fc22310d05ab2a7Jeff Cohen for (BB = Fn.begin(), EB = Fn.end(); BB != EB; ++BB) { 1791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *MBB = new MachineBasicBlock(BB); 1801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MBBMap[BB] = MBB; 1811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MF.getBasicBlockList().push_back(MBB); 1821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Create Machine PHI nodes for LLVM PHI nodes, lowering them as 1841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // appropriate. 1851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHINode *PN; 1861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = BB->begin(); 187f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner (PN = dyn_cast<PHINode>(I)); ++I) 188f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (!PN->use_empty()) { 189f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned NumElements = 190f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner TLI.getNumElements(TLI.getValueType(PN->getType())); 191f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned PHIReg = ValueMap[PN]; 192f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner assert(PHIReg &&"PHI node does not have an assigned virtual register!"); 193f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner for (unsigned i = 0; i != NumElements; ++i) 194f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner BuildMI(MBB, TargetInstrInfo::PHI, PN->getNumOperands(), PHIReg+i); 195f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } 1961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner//===----------------------------------------------------------------------===// 2021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// SelectionDAGLowering - This is the common target-independent lowering 2031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// implementation that is parameterized by a TargetLowering object. 2041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// Also, targets can overload any lowering method. 2051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner/// 2061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnernamespace llvm { 2071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerclass SelectionDAGLowering { 2081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *CurMBB; 2091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, SDOperand> NodeMap; 2111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 212d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// PendingLoads - Loads are not emitted to the program immediately. We bunch 213d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// them up and then emit token factor nodes when possible. This allows us to 214d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// get simple disambiguation between loads without worrying about alias 215d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner /// analysis. 216d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner std::vector<SDOperand> PendingLoads; 217d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 2181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerpublic: 2191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // TLI - This is information that describes the available target features we 2201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // need for lowering. This indicates when operations are unavailable, 2211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // implemented with a libcall, etc. 2221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TargetLowering &TLI; 2231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectionDAG &DAG; 2241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const TargetData &TD; 2251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// FuncInfo - Information about the function as a whole. 2271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner /// 2281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo &FuncInfo; 2291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectionDAGLowering(SelectionDAG &dag, TargetLowering &tli, 231edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman FunctionLoweringInfo &funcinfo) 2321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner : TLI(tli), DAG(dag), TD(DAG.getTarget().getTargetData()), 2331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo(funcinfo) { 2341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 236a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner /// getRoot - Return the current virtual root of the Selection DAG. 237a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner /// 238a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner SDOperand getRoot() { 239d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (PendingLoads.empty()) 240d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return DAG.getRoot(); 241edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 242d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (PendingLoads.size() == 1) { 243d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root = PendingLoads[0]; 244d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(Root); 245d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.clear(); 246d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return Root; 247d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner } 248d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 249d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner // Otherwise, we have to make a token factor node. 250d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root = DAG.getNode(ISD::TokenFactor, MVT::Other, PendingLoads); 251d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.clear(); 252d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(Root); 253d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner return Root; 254a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner } 255a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner 2561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visit(Instruction &I) { visit(I.getOpcode(), I); } 2571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visit(unsigned Opcode, User &I) { 2591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner switch (Opcode) { 2601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner default: assert(0 && "Unknown instruction type encountered!"); 2611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 2621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Build the switch statement using the Instruction.def file. 2631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#define HANDLE_INST(NUM, OPCODE, CLASS) \ 2641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case Instruction::OPCODE:return visit##OPCODE((CLASS&)I); 2651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner#include "llvm/Instruction.def" 2661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void setCurrentBasicBlock(MachineBasicBlock *MBB) { CurMBB = MBB; } 2701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand getIntPtrConstant(uint64_t Val) { 2731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return DAG.getConstant(Val, TLI.getPointerTy()); 2741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand getValue(const Value *V) { 2771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand &N = NodeMap[V]; 2781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (N.Val) return N; 2791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType VT = TLI.getValueType(V->getType()); 2811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Constant *C = const_cast<Constant*>(dyn_cast<Constant>(V))) 2821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) { 2831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner visit(CE->getOpcode(), *CE); 2841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(N.Val && "visit didn't populate the ValueMap!"); 2851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N; 2861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (GlobalValue *GV = dyn_cast<GlobalValue>(C)) { 2871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getGlobalAddress(GV, VT); 2881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (isa<ConstantPointerNull>(C)) { 2891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getConstant(0, TLI.getPointerTy()); 2901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (isa<UndefValue>(C)) { 291b882752bd04602249d391699dc7183de007f8964Nate Begeman return N = DAG.getNode(ISD::UNDEF, VT); 2921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (ConstantFP *CFP = dyn_cast<ConstantFP>(C)) { 2931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getConstantFP(CFP->getValue(), VT); 2941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 2951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Canonicalize all constant ints to be unsigned. 2961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = DAG.getConstant(cast<ConstantIntegral>(C)->getRawValue(),VT); 2971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 2981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 2991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (const AllocaInst *AI = dyn_cast<AllocaInst>(V)) { 3001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const AllocaInst*, int>::iterator SI = 3011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo.StaticAllocaMap.find(AI); 3021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (SI != FuncInfo.StaticAllocaMap.end()) 3031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return DAG.getFrameIndex(SI->second, TLI.getPointerTy()); 3041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<const Value*, unsigned>::const_iterator VMI = 3071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FuncInfo.ValueMap.find(V); 3081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(VMI != FuncInfo.ValueMap.end() && "Value not in map!"); 309c8ea3c47103656a0924909f41651bf5d396c26cdChris Lattner 310d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner unsigned InReg = VMI->second; 311d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 312d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // If this type is not legal, make it so now. 313d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType DestVT = TLI.getTypeToTransformTo(VT); 314d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 315d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getCopyFromReg(DAG.getEntryNode(), InReg, DestVT); 316d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (DestVT < VT) { 317d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // Source must be expanded. This input value is actually coming from the 318d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // register pair VMI->second and VMI->second+1. 319d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getNode(ISD::BUILD_PAIR, VT, N, 320d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner DAG.getCopyFromReg(DAG.getEntryNode(), InReg+1, DestVT)); 321d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else { 322d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (DestVT > VT) { // Promotion case 323d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (MVT::isFloatingPoint(VT)) 324d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getNode(ISD::FP_ROUND, VT, N); 325d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner else 326d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner N = DAG.getNode(ISD::TRUNCATE, VT, N); 327d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 328d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 329d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 330d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return N; 3311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const SDOperand &setValue(const Value *V, SDOperand NewN) { 3341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand &N = NodeMap[V]; 3351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(N.Val == 0 && "Already set a value for this node!"); 3361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return N = NewN; 3371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Terminator instructions. 3401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitRet(ReturnInst &I); 3411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitBr(BranchInst &I); 3421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUnreachable(UnreachableInst &I) { /* noop */ } 3431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // These all get lowered before this pass. 3451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSwitch(SwitchInst &I) { assert(0 && "TODO"); } 3461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitInvoke(InvokeInst &I) { assert(0 && "TODO"); } 3471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUnwind(UnwindInst &I) { assert(0 && "TODO"); } 3481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // 3508f03405ee57094d627c342fb6087399a30009a02Chris Lattner void visitBinary(User &I, unsigned Opcode, bool isShift = false); 35101b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner void visitAdd(User &I) { 35201b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner visitBinary(I, I.getType()->isFloatingPoint() ? ISD::FADD : ISD::ADD); 35301b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 354b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner void visitSub(User &I); 35501b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner void visitMul(User &I) { 35601b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner visitBinary(I, I.getType()->isFloatingPoint() ? ISD::FMUL : ISD::MUL); 35701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 3581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitDiv(User &I) { 35901b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner unsigned Opc; 36001b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner const Type *Ty = I.getType(); 36101b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (Ty->isFloatingPoint()) 36201b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner Opc = ISD::FDIV; 36301b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner else if (Ty->isUnsigned()) 36401b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner Opc = ISD::UDIV; 36501b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner else 36601b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner Opc = ISD::SDIV; 36701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner visitBinary(I, Opc); 3681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitRem(User &I) { 37001b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner unsigned Opc; 37101b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner const Type *Ty = I.getType(); 37201b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (Ty->isFloatingPoint()) 37301b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner Opc = ISD::FREM; 37401b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner else if (Ty->isUnsigned()) 37501b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner Opc = ISD::UREM; 37601b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner else 37701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner Opc = ISD::SREM; 37801b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner visitBinary(I, Opc); 3791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitAnd(User &I) { visitBinary(I, ISD::AND); } 3811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitOr (User &I) { visitBinary(I, ISD::OR); } 3821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitXor(User &I) { visitBinary(I, ISD::XOR); } 3838f03405ee57094d627c342fb6087399a30009a02Chris Lattner void visitShl(User &I) { visitBinary(I, ISD::SHL, true); } 3841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitShr(User &I) { 3858f03405ee57094d627c342fb6087399a30009a02Chris Lattner visitBinary(I, I.getType()->isUnsigned() ? ISD::SRL : ISD::SRA, true); 3861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 3871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetCC(User &I, ISD::CondCode SignedOpc, ISD::CondCode UnsignedOpc); 3891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetEQ(User &I) { visitSetCC(I, ISD::SETEQ, ISD::SETEQ); } 3901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetNE(User &I) { visitSetCC(I, ISD::SETNE, ISD::SETNE); } 3911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetLE(User &I) { visitSetCC(I, ISD::SETLE, ISD::SETULE); } 3921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetGE(User &I) { visitSetCC(I, ISD::SETGE, ISD::SETUGE); } 3931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetLT(User &I) { visitSetCC(I, ISD::SETLT, ISD::SETULT); } 3941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSetGT(User &I) { visitSetCC(I, ISD::SETGT, ISD::SETUGT); } 3951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 3961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitGetElementPtr(User &I); 3971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitCast(User &I); 3981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitSelect(User &I); 3991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // 4001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitMalloc(MallocInst &I); 4021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitFree(FreeInst &I); 4031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitAlloca(AllocaInst &I); 4041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitLoad(LoadInst &I); 4051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitStore(StoreInst &I); 4061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitPHI(PHINode &I) { } // PHI nodes are handled specially. 4071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitCall(CallInst &I); 4081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAStart(CallInst &I); 4101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAArg(VAArgInst &I); 4111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVAEnd(CallInst &I); 4121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitVACopy(CallInst &I); 41339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner void visitFrameReturnAddress(CallInst &I, bool isFrameAddress); 4141c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4157041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner void visitMemIntrinsic(CallInst &I, unsigned Op); 4161c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUserOp1(Instruction &I) { 4181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(0 && "UserOp1 should not exist at instruction selection time!"); 4191c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 4201c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4211c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner void visitUserOp2(Instruction &I) { 4221c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(0 && "UserOp2 should not exist at instruction selection time!"); 4231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 4241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4251c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner}; 4261c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} // end namespace llvm 4271c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4281c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitRet(ReturnInst &I) { 4291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getNumOperands() == 0) { 430a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::RET, MVT::Other, getRoot())); 4311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return; 4321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op1 = getValue(I.getOperand(0)); 435f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner MVT::ValueType TmpVT; 436f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner 4371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner switch (Op1.getValueType()) { 4381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner default: assert(0 && "Unknown value type!"); 4391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case MVT::i1: 4401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case MVT::i8: 4411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case MVT::i16: 442f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner case MVT::i32: 443f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner // If this is a machine where 32-bits is legal or expanded, promote to 444f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner // 32-bits, otherwise, promote to 64-bits. 445f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner if (TLI.getTypeAction(MVT::i32) == TargetLowering::Promote) 446f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner TmpVT = TLI.getTypeToTransformTo(MVT::i32); 447f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner else 448f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner TmpVT = MVT::i32; 449f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner 450f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner // Extend integer types to result type. 4511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getOperand(0)->getType()->isSigned()) 452f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner Op1 = DAG.getNode(ISD::SIGN_EXTEND, TmpVT, Op1); 4531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner else 454f51d3bd6769d46e7cf7beaa283d1ca449629bd32Chris Lattner Op1 = DAG.getNode(ISD::ZERO_EXTEND, TmpVT, Op1); 4551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner break; 4561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case MVT::f32: 4571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case MVT::i64: 4581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner case MVT::f64: 4591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner break; // No extension needed! 4601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 4614a95945fa5aa431110f50092f4a45d24772a553bNate Begeman // Allow targets to lower this further to meet ABI requirements 4624a95945fa5aa431110f50092f4a45d24772a553bNate Begeman DAG.setRoot(TLI.LowerReturnTo(getRoot(), Op1, DAG)); 4631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 4641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitBr(BranchInst &I) { 4661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Update machine-CFG edges. 4671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *Succ0MBB = FuncInfo.MBBMap[I.getSuccessor(0)]; 4681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Figure out which block is immediately after the current one. 4701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *NextBlock = 0; 4711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction::iterator BBI = CurMBB; 4721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (++BBI != CurMBB->getParent()->end()) 4731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner NextBlock = BBI; 4741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.isUnconditional()) { 4761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is not a fall-through branch, emit the branch. 4771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Succ0MBB != NextBlock) 478a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BR, MVT::Other, getRoot(), 479dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman DAG.getBasicBlock(Succ0MBB))); 4801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 4811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock *Succ1MBB = FuncInfo.MBBMap[I.getSuccessor(1)]; 4821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 4831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Cond = getValue(I.getCondition()); 4841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Succ1MBB == NextBlock) { 4851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If the condition is false, fall through. This means we should branch 4861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // if the condition is true to Succ #0. 487a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), 488dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman Cond, DAG.getBasicBlock(Succ0MBB))); 4891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else if (Succ0MBB == NextBlock) { 4901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If the condition is true, fall through. This means we should branch if 4911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the condition is false to Succ #1. Invert the condition first. 4921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand True = DAG.getConstant(1, Cond.getValueType()); 4931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Cond = DAG.getNode(ISD::XOR, Cond.getValueType(), Cond, True); 494a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCOND, MVT::Other, getRoot(), 495dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman Cond, DAG.getBasicBlock(Succ1MBB))); 4961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 497e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner std::vector<SDOperand> Ops; 498e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(getRoot()); 499e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(Cond); 500e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(DAG.getBasicBlock(Succ0MBB)); 501e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner Ops.push_back(DAG.getBasicBlock(Succ1MBB)); 502e7ccd4acd2ee9753e6d212efd522be5c7de154d7Chris Lattner DAG.setRoot(DAG.getNode(ISD::BRCONDTWOWAY, MVT::Other, Ops)); 5031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 507b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattnervoid SelectionDAGLowering::visitSub(User &I) { 508b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner // -0.0 - X --> fneg 50901b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (I.getType()->isFloatingPoint()) { 51001b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (ConstantFP *CFP = dyn_cast<ConstantFP>(I.getOperand(0))) 51101b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner if (CFP->isExactlyValue(-0.0)) { 51201b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 51301b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner setValue(&I, DAG.getNode(ISD::FNEG, Op2.getValueType(), Op2)); 51401b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner return; 51501b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 51601b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner visitBinary(I, ISD::FSUB); 51701b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } else { 51801b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner visitBinary(I, ISD::SUB); 51901b3d73c20f5afb8265ae943a8ba23c2238c5eeaChris Lattner } 520b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner} 521b9fccc41933648647e3f7669612c683eb5de0d58Chris Lattner 5228f03405ee57094d627c342fb6087399a30009a02Chris Lattnervoid SelectionDAGLowering::visitBinary(User &I, unsigned Opcode, bool isShift) { 5231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op1 = getValue(I.getOperand(0)); 5241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 5252c49f2795514a7c56b680ba0310d7eb0a8a43289Chris Lattner 5268f03405ee57094d627c342fb6087399a30009a02Chris Lattner if (isShift) 527fab08875b73656f373b10a59aad475615df82bafChris Lattner Op2 = DAG.getNode(ISD::ANY_EXTEND, TLI.getShiftAmountTy(), Op2); 5282c49f2795514a7c56b680ba0310d7eb0a8a43289Chris Lattner 5291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, DAG.getNode(Opcode, Op1.getValueType(), Op1, Op2)); 5301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitSetCC(User &I,ISD::CondCode SignedOpcode, 5331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ISD::CondCode UnsignedOpcode) { 5341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op1 = getValue(I.getOperand(0)); 5351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Op2 = getValue(I.getOperand(1)); 5361c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ISD::CondCode Opcode = SignedOpcode; 5371c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getOperand(0)->getType()->isUnsigned()) 5381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Opcode = UnsignedOpcode; 5397cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1, Op1, Op2, Opcode)); 5401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitSelect(User &I) { 5431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Cond = getValue(I.getOperand(0)); 5441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand TrueVal = getValue(I.getOperand(1)); 5451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand FalseVal = getValue(I.getOperand(2)); 5461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, DAG.getNode(ISD::SELECT, TrueVal.getValueType(), Cond, 5471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TrueVal, FalseVal)); 5481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitCast(User &I) { 5511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand N = getValue(I.getOperand(0)); 5521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType SrcTy = TLI.getValueType(I.getOperand(0)->getType()); 5531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType DestTy = TLI.getValueType(I.getType()); 5541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (N.getValueType() == DestTy) { 5561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, N); // noop cast. 557ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner } else if (DestTy == MVT::i1) { 558ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner // Cast to bool is a comparison against zero, not truncation to zero. 559ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner SDOperand Zero = isInteger(SrcTy) ? DAG.getConstant(0, N.getValueType()) : 560ef311aa7cf26ae0cbb6e784d767801b9058dd24bChris Lattner DAG.getConstantFP(0.0, N.getValueType()); 5617cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1, N, Zero, ISD::SETNE)); 562ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else if (isInteger(SrcTy)) { 563ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (isInteger(DestTy)) { // Int -> Int cast 564ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (DestTy < SrcTy) // Truncating cast? 565ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::TRUNCATE, DestTy, N)); 566ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else if (I.getOperand(0)->getType()->isSigned()) 567ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::SIGN_EXTEND, DestTy, N)); 568ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 569ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::ZERO_EXTEND, DestTy, N)); 570ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else { // Int -> FP cast 571ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (I.getOperand(0)->getType()->isSigned()) 572ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::SINT_TO_FP, DestTy, N)); 573ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 574ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::UINT_TO_FP, DestTy, N)); 575ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } 5761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 577ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner assert(isFloatingPoint(SrcTy) && "Unknown value type!"); 578ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (isFloatingPoint(DestTy)) { // FP -> FP cast 579ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (DestTy < SrcTy) // Rounding cast? 580ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_ROUND, DestTy, N)); 581ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 582ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_EXTEND, DestTy, N)); 583ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } else { // FP -> Int cast. 584ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner if (I.getType()->isSigned()) 585ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_TO_SINT, DestTy, N)); 586ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner else 587ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner setValue(&I, DAG.getNode(ISD::FP_TO_UINT, DestTy, N)); 588ae0aacb8331e1227abea6601e531a10d0e65fdcaChris Lattner } 5891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 5901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 5911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitGetElementPtr(User &I) { 5931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand N = getValue(I.getOperand(0)); 5941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = I.getOperand(0)->getType(); 5951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *UIntPtrTy = TD.getIntPtrType(); 5961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 5971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (GetElementPtrInst::op_iterator OI = I.op_begin()+1, E = I.op_end(); 5981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner OI != E; ++OI) { 5991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *Idx = *OI; 6001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (const StructType *StTy = dyn_cast<StructType> (Ty)) { 6011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned Field = cast<ConstantUInt>(Idx)->getValue(); 6021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Field) { 6031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // N = N + Offset 6041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t Offset = TD.getStructLayout(StTy)->MemberOffsets[Field]; 6051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, 606dedf2bd5a34dac25e4245f58bb902ced6b64edd9Misha Brukman getIntPtrConstant(Offset)); 6071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Ty = StTy->getElementType(Field); 6091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } else { 6101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Ty = cast<SequentialType>(Ty)->getElementType(); 6117c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 6127c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // If this is a constant subscript, handle it quickly. 6137c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (ConstantInt *CI = dyn_cast<ConstantInt>(Idx)) { 6147c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (CI->getRawValue() == 0) continue; 6157c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 6167c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner uint64_t Offs; 6177c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (ConstantSInt *CSI = dyn_cast<ConstantSInt>(CI)) 6187c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner Offs = (int64_t)TD.getTypeSize(Ty)*CSI->getValue(); 6197c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner else 6207c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner Offs = TD.getTypeSize(Ty)*cast<ConstantUInt>(CI)->getValue(); 6217c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, getIntPtrConstant(Offs)); 6227c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner continue; 6237c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner } 6247c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 6257c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // N = N + Idx * ElementSize; 6267c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner uint64_t ElementSize = TD.getTypeSize(Ty); 6277c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner SDOperand IdxN = getValue(Idx); 6287c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 6297c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // If the index is smaller or larger than intptr_t, truncate or extend 6307c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // it. 6317c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (IdxN.getValueType() < N.getValueType()) { 6327c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (Idx->getType()->isSigned()) 6337c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::SIGN_EXTEND, N.getValueType(), IdxN); 6347c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner else 6357c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::ZERO_EXTEND, N.getValueType(), IdxN); 6367c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner } else if (IdxN.getValueType() > N.getValueType()) 6377c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::TRUNCATE, N.getValueType(), IdxN); 6387c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 6397c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // If this is a multiply by a power of two, turn it into a shl 6407c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner // immediately. This is a very common case. 6417c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner if (isPowerOf2_64(ElementSize)) { 6427c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner unsigned Amt = Log2_64(ElementSize); 6437c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::SHL, N.getValueType(), IdxN, 6447c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner getIntPtrConstant(Amt)); 6451c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, IdxN); 6467c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner continue; 6471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6487c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner 6497c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner SDOperand Scale = getIntPtrConstant(ElementSize); 6507c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner IdxN = DAG.getNode(ISD::MUL, N.getValueType(), IdxN, Scale); 6517c0104b525a4ba8b5268ee5455f92b011f7cc263Chris Lattner N = DAG.getNode(ISD::ADD, N.getValueType(), N, IdxN); 6521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6541c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner setValue(&I, N); 6551c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 6561c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitAlloca(AllocaInst &I) { 6581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is a fixed sized alloca in the entry block of the function, 6591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // allocate it statically on the stack. 6601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (FuncInfo.StaticAllocaMap.count(&I)) 6611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return; // getValue will auto-populate this. 6621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner const Type *Ty = I.getAllocatedType(); 6641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t TySize = TLI.getTargetData().getTypeSize(Ty); 665ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman unsigned Align = std::max((unsigned)TLI.getTargetData().getTypeAlignment(Ty), 666ae232e7a1055033436370c0b3aecf054fa44d5e7Nate Begeman I.getAlignment()); 6671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand AllocSize = getValue(I.getArraySize()); 66968cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 67068cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner if (IntPtr < AllocSize.getValueType()) 67168cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::TRUNCATE, IntPtr, AllocSize); 67268cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner else if (IntPtr > AllocSize.getValueType()) 67368cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::ZERO_EXTEND, IntPtr, AllocSize); 6741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 67568cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner AllocSize = DAG.getNode(ISD::MUL, IntPtr, AllocSize, 6761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(TySize)); 6771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 6781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Handle alignment. If the requested alignment is less than or equal to the 6791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // stack alignment, ignore it and round the size of the allocation up to the 6801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // stack alignment size. If the size is greater than the stack alignment, we 6811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // note this in the DYNAMIC_STACKALLOC node. 6821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner unsigned StackAlign = 6831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TLI.getTargetMachine().getFrameInfo()->getStackAlignment(); 6841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Align <= StackAlign) { 6851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Align = 0; 6861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Add SA-1 to the size. 6871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner AllocSize = DAG.getNode(ISD::ADD, AllocSize.getValueType(), AllocSize, 6881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(StackAlign-1)); 6891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Mask out the low bits for alignment purposes. 6901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner AllocSize = DAG.getNode(ISD::AND, AllocSize.getValueType(), AllocSize, 6911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner getIntPtrConstant(~(uint64_t)(StackAlign-1))); 6921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 6931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 694adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner std::vector<MVT::ValueType> VTs; 695adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner VTs.push_back(AllocSize.getValueType()); 696adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner VTs.push_back(MVT::Other); 697adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner std::vector<SDOperand> Ops; 698adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(getRoot()); 699adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(AllocSize); 700adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner Ops.push_back(getIntPtrConstant(Align)); 701adf6c2a0cb638e8b211200b57b927d16f6e1cfc4Chris Lattner SDOperand DSA = DAG.getNode(ISD::DYNAMIC_STACKALLOC, VTs, Ops); 7021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DAG.setRoot(setValue(&I, DSA).getValue(1)); 7031c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7041c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Inform the Frame Information that we have just allocated a variable-sized 7051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // object. 7061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner CurMBB->getParent()->getFrameInfo()->CreateVariableSizedObject(); 7071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitLoad(LoadInst &I) { 7111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Ptr = getValue(I.getOperand(0)); 712edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 713d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner SDOperand Root; 714d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (I.isVolatile()) 715d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner Root = getRoot(); 716d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner else { 717d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner // Do not serialize non-volatile loads against each other. 718d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner Root = DAG.getRoot(); 719d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner } 720d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 721369e6db9b6033bb60519b0ad84afeacc9ec9b416Chris Lattner SDOperand L = DAG.getLoad(TLI.getValueType(I.getType()), Root, Ptr, 72206ef88472f7bac3512e224974e87a0a456471b82Andrew Lenharth DAG.getSrcValue(I.getOperand(0))); 723d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner setValue(&I, L); 724d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner 725d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner if (I.isVolatile()) 726d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner DAG.setRoot(L.getValue(1)); 727d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner else 728d3948116b81b11e82246c11389a9b4ce7e619fbbChris Lattner PendingLoads.push_back(L.getValue(1)); 7291c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7301c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitStore(StoreInst &I) { 7331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *SrcV = I.getOperand(0); 7341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Src = getValue(SrcV); 7351c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Ptr = getValue(I.getOperand(1)); 736369e6db9b6033bb60519b0ad84afeacc9ec9b416Chris Lattner DAG.setRoot(DAG.getNode(ISD::STORE, MVT::Other, getRoot(), Src, Ptr, 73706ef88472f7bac3512e224974e87a0a456471b82Andrew Lenharth DAG.getSrcValue(I.getOperand(1)))); 7381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 7391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 7401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitCall(CallInst &I) { 74164e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner const char *RenameFn = 0; 742d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner SDOperand Tmp; 7431c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (Function *F = I.getCalledFunction()) 744c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner if (F->isExternal()) 745c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner switch (F->getIntrinsicID()) { 746c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case 0: // Not an LLVM intrinsic. 747c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner if (F->getName() == "fabs" || F->getName() == "fabsf") { 748c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 749c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 750c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner I.getType() == I.getOperand(1)->getType()) { 751d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner Tmp = getValue(I.getOperand(1)); 752c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner setValue(&I, DAG.getNode(ISD::FABS, Tmp.getValueType(), Tmp)); 753c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner return; 754c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner } 755c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner } 756f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner else if (F->getName() == "sin" || F->getName() == "sinf") { 757f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 758f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 759f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getType() == I.getOperand(1)->getType()) { 760d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner Tmp = getValue(I.getOperand(1)); 761f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner setValue(&I, DAG.getNode(ISD::FSIN, Tmp.getValueType(), Tmp)); 762f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner return; 763f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 764f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 765f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner else if (F->getName() == "cos" || F->getName() == "cosf") { 766f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner if (I.getNumOperands() == 2 && // Basic sanity checks. 767f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getOperand(1)->getType()->isFloatingPoint() && 768f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner I.getType() == I.getOperand(1)->getType()) { 769d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner Tmp = getValue(I.getOperand(1)); 770f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner setValue(&I, DAG.getNode(ISD::FCOS, Tmp.getValueType(), Tmp)); 771f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner return; 772f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 773f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner } 774c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner break; 775c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::vastart: visitVAStart(I); return; 776c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::vaend: visitVAEnd(I); return; 777c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::vacopy: visitVACopy(I); return; 778c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::returnaddress: visitFrameReturnAddress(I, false); return; 779c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::frameaddress: visitFrameReturnAddress(I, true); return; 780d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner 7816c38b33613d64522581dc55d82fffa4aee0e9f22Chris Lattner case Intrinsic::setjmp: 7826c38b33613d64522581dc55d82fffa4aee0e9f22Chris Lattner RenameFn = "_setjmp"+!TLI.usesUnderscoreSetJmpLongJmp(); 7836c38b33613d64522581dc55d82fffa4aee0e9f22Chris Lattner break; 7846c38b33613d64522581dc55d82fffa4aee0e9f22Chris Lattner case Intrinsic::longjmp: 7856c38b33613d64522581dc55d82fffa4aee0e9f22Chris Lattner RenameFn = "_longjmp"+!TLI.usesUnderscoreSetJmpLongJmp(); 7866c38b33613d64522581dc55d82fffa4aee0e9f22Chris Lattner break; 787c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::memcpy: visitMemIntrinsic(I, ISD::MEMCPY); return; 788c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::memset: visitMemIntrinsic(I, ISD::MEMSET); return; 789c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::memmove: visitMemIntrinsic(I, ISD::MEMMOVE); return; 790edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 791d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner case Intrinsic::readport: 7921ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner case Intrinsic::readio: { 7931ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner std::vector<MVT::ValueType> VTs; 7941ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner VTs.push_back(TLI.getValueType(I.getType())); 7951ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner VTs.push_back(MVT::Other); 7961ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner std::vector<SDOperand> Ops; 7971ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner Ops.push_back(getRoot()); 7981ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner Ops.push_back(getValue(I.getOperand(1))); 799d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner Tmp = DAG.getNode(F->getIntrinsicID() == Intrinsic::readport ? 8001ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner ISD::READPORT : ISD::READIO, VTs, Ops); 80100b16889ab461b7ecef1c91ade101186b7f1fce2Jeff Cohen 802d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner setValue(&I, Tmp); 803d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner DAG.setRoot(Tmp.getValue(1)); 804d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner return; 8051ca85d567c8860a8a7cf0730107f4ee701fa4fd0Chris Lattner } 806d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner case Intrinsic::writeport: 807d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner case Intrinsic::writeio: 808d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner DAG.setRoot(DAG.getNode(F->getIntrinsicID() == Intrinsic::writeport ? 809d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner ISD::WRITEPORT : ISD::WRITEIO, MVT::Other, 810d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner getRoot(), getValue(I.getOperand(1)), 811d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner getValue(I.getOperand(2)))); 812d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner return; 8137ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner case Intrinsic::dbg_stoppoint: 8147ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner case Intrinsic::dbg_region_start: 8157ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner case Intrinsic::dbg_region_end: 8167ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner case Intrinsic::dbg_func_start: 8177ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner case Intrinsic::dbg_declare: 8187ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner if (I.getType() != Type::VoidTy) 8197ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner setValue(&I, DAG.getNode(ISD::UNDEF, TLI.getValueType(I.getType()))); 8207ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner return; 8217ea0ade1b6a16b5836645b61da671715180ab039Chris Lattner 822c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner case Intrinsic::isunordered: 8237cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner setValue(&I, DAG.getSetCC(MVT::i1,getValue(I.getOperand(1)), 8247cf7e3f33f25544d08492d47cc8a1cbba25dc8d7Chris Lattner getValue(I.getOperand(2)), ISD::SETUO)); 825c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner return; 826f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner 827f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner case Intrinsic::sqrt: 828f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner setValue(&I, DAG.getNode(ISD::FSQRT, 829f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner getValue(I.getOperand(1)).getValueType(), 830f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner getValue(I.getOperand(1)))); 831f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner return; 832f76e7dc8d8ac1855ef59698e82c757548ef4ca65Chris Lattner 833d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner case Intrinsic::pcmarker: 834d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner Tmp = getValue(I.getOperand(1)); 835d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner DAG.setRoot(DAG.getNode(ISD::PCMARKER, MVT::Other, getRoot(), Tmp)); 836c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner return; 837691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth case Intrinsic::cttz: 838691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth setValue(&I, DAG.getNode(ISD::CTTZ, 839691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth getValue(I.getOperand(1)).getValueType(), 840691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth getValue(I.getOperand(1)))); 841691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth return; 842691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth case Intrinsic::ctlz: 843691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth setValue(&I, DAG.getNode(ISD::CTLZ, 844691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth getValue(I.getOperand(1)).getValueType(), 845691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth getValue(I.getOperand(1)))); 846691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth return; 847691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth case Intrinsic::ctpop: 848691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth setValue(&I, DAG.getNode(ISD::CTPOP, 849691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth getValue(I.getOperand(1)).getValueType(), 850691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth getValue(I.getOperand(1)))); 851691ef2ba066dda14ae4ac0ad645054fbc967785aAndrew Lenharth return; 852d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner default: 853d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner std::cerr << I; 854d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner assert(0 && "This intrinsic is not implemented yet!"); 855d0f6c1f52dddf11701406c31fd3e9448314a8366Chris Lattner return; 856c0f18152d94bf65061fab4b80869998cfb0439e1Chris Lattner } 857edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 85864e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner SDOperand Callee; 85964e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner if (!RenameFn) 86064e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner Callee = getValue(I.getOperand(0)); 86164e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner else 86264e14b1679fa3649b286402ea254d663ac43ef91Chris Lattner Callee = DAG.getExternalSymbol(RenameFn, TLI.getPointerTy()); 8631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 864edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 8651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 1, e = I.getNumOperands(); i != e; ++i) { 8661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Value *Arg = I.getOperand(i); 8671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand ArgNode = getValue(Arg); 8681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(ArgNode, Arg->getType())); 8691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 870edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 8718e21e71b248365c69c0f666518c378b5819ce6fbNate Begeman const PointerType *PT = cast<PointerType>(I.getCalledValue()->getType()); 8728e21e71b248365c69c0f666518c378b5819ce6fbNate Begeman const FunctionType *FTy = cast<FunctionType>(PT->getElementType()); 873edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 874cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 8759092fa310c8b2b1645b0d448c4c34b1e8ddc131dChris Lattner TLI.LowerCallTo(getRoot(), I.getType(), FTy->isVarArg(), I.getCallingConv(), 876adf6a965a321372c640845407195594835921eb4Chris Lattner I.isTailCall(), Callee, Args, DAG); 8771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (I.getType() != Type::VoidTy) 878cf5734dddd66af9388a171b44996505ede47feedChris Lattner setValue(&I, Result.first); 879cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 8801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 8811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitMalloc(MallocInst &I) { 8831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDOperand Src = getValue(I.getOperand(0)); 8841c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 88668cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner 88768cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner if (IntPtr < Src.getValueType()) 88868cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner Src = DAG.getNode(ISD::TRUNCATE, IntPtr, Src); 88968cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner else if (IntPtr > Src.getValueType()) 89068cd65ea689907fb8a4aa80d72d182921e94607fChris Lattner Src = DAG.getNode(ISD::ZERO_EXTEND, IntPtr, Src); 8911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Scale the source by the type size. 8931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner uint64_t ElementSize = TD.getTypeSize(I.getType()->getElementType()); 8941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Src = DAG.getNode(ISD::MUL, Src.getValueType(), 8951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Src, getIntPtrConstant(ElementSize)); 8961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 8971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 8981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(Src, TLI.getTargetData().getIntPtrType())); 899cf5734dddd66af9388a171b44996505ede47feedChris Lattner 900cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 901adf6a965a321372c640845407195594835921eb4Chris Lattner TLI.LowerCallTo(getRoot(), I.getType(), false, CallingConv::C, true, 902cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.getExternalSymbol("malloc", IntPtr), 903cf5734dddd66af9388a171b44996505ede47feedChris Lattner Args, DAG); 904cf5734dddd66af9388a171b44996505ede47feedChris Lattner setValue(&I, Result.first); // Pointers always fit in registers 905cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 9061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9071c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9081c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitFree(FreeInst &I) { 9091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<SDOperand, const Type*> > Args; 9101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner Args.push_back(std::make_pair(getValue(I.getOperand(0)), 9111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TLI.getTargetData().getIntPtrType())); 9121c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MVT::ValueType IntPtr = TLI.getPointerTy(); 913cf5734dddd66af9388a171b44996505ede47feedChris Lattner std::pair<SDOperand,SDOperand> Result = 914adf6a965a321372c640845407195594835921eb4Chris Lattner TLI.LowerCallTo(getRoot(), Type::VoidTy, false, CallingConv::C, true, 915cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.getExternalSymbol("free", IntPtr), Args, DAG); 916cf5734dddd66af9388a171b44996505ede47feedChris Lattner DAG.setRoot(Result.second); 9171c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9181c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 919025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// InsertAtEndOfBasicBlock - This method should be implemented by targets that 920025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// mark instructions with the 'usesCustomDAGSchedInserter' flag. These 921025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// instructions are special in various ways, which require special support to 922025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// insert. The specified MachineInstr is created but not inserted into any 923025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner// basic blocks, and the scheduler passes ownership of it to this method. 924025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris LattnerMachineBasicBlock *TargetLowering::InsertAtEndOfBasicBlock(MachineInstr *MI, 925025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner MachineBasicBlock *MBB) { 926025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner std::cerr << "If a target marks an instruction with " 927025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner "'usesCustomDAGSchedInserter', it must implement " 928025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner "TargetLowering::InsertAtEndOfBasicBlock!\n"; 929025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner abort(); 930025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner return 0; 931025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner} 932025c39bf36b6bc2f35a5544338de6cf96fa511a9Chris Lattner 9334a95945fa5aa431110f50092f4a45d24772a553bNate BegemanSDOperand TargetLowering::LowerReturnTo(SDOperand Chain, SDOperand Op, 9344a95945fa5aa431110f50092f4a45d24772a553bNate Begeman SelectionDAG &DAG) { 9354a95945fa5aa431110f50092f4a45d24772a553bNate Begeman return DAG.getNode(ISD::RET, MVT::Other, Chain, Op); 9364a95945fa5aa431110f50092f4a45d24772a553bNate Begeman} 9374a95945fa5aa431110f50092f4a45d24772a553bNate Begeman 938e64e72b794cfa385372436b3c88460aeee0acbf6Chris LattnerSDOperand TargetLowering::LowerVAStart(SDOperand Chain, 939e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SDOperand VAListP, Value *VAListV, 940e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SelectionDAG &DAG) { 9411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // We have no sane default behavior, just emit a useful error message and bail 9421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // out. 94339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner std::cerr << "Variable arguments handling not implemented on this target!\n"; 9441c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 945e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner return SDOperand(); 9461c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 948e64e72b794cfa385372436b3c88460aeee0acbf6Chris LattnerSDOperand TargetLowering::LowerVAEnd(SDOperand Chain, SDOperand LP, Value *LV, 94939ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner SelectionDAG &DAG) { 95039ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner // Default to a noop. 95139ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner return Chain; 95239ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 95339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 954e64e72b794cfa385372436b3c88460aeee0acbf6Chris LattnerSDOperand TargetLowering::LowerVACopy(SDOperand Chain, 955e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SDOperand SrcP, Value *SrcV, 956e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SDOperand DestP, Value *DestV, 957e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SelectionDAG &DAG) { 958e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner // Default to copying the input list. 959e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SDOperand Val = DAG.getLoad(getPointerTy(), Chain, 960e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SrcP, DAG.getSrcValue(SrcV)); 961213e557cef3e653e2d3a00b07b137c143128430aAndrew Lenharth SDOperand Result = DAG.getNode(ISD::STORE, MVT::Other, Val.getValue(1), 962e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner Val, DestP, DAG.getSrcValue(DestV)); 963e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner return Result; 96439ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 96539ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 96639ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnerstd::pair<SDOperand,SDOperand> 967e64e72b794cfa385372436b3c88460aeee0acbf6Chris LattnerTargetLowering::LowerVAArg(SDOperand Chain, SDOperand VAListP, Value *VAListV, 968e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner const Type *ArgTy, SelectionDAG &DAG) { 9691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // We have no sane default behavior, just emit a useful error message and bail 9701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // out. 97139ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner std::cerr << "Variable arguments handling not implemented on this target!\n"; 9721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner abort(); 973d3f03e4b50feb6abfa9fec8b0aa705d45134c59eMisha Brukman return std::make_pair(SDOperand(), SDOperand()); 9741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 97539ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 97639ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 97739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnervoid SelectionDAGLowering::visitVAStart(CallInst &I) { 978e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner DAG.setRoot(TLI.LowerVAStart(getRoot(), getValue(I.getOperand(1)), 979e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner I.getOperand(1), DAG)); 98039ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 98139ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner 9821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVAArg(VAArgInst &I) { 98339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner std::pair<SDOperand,SDOperand> Result = 984e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner TLI.LowerVAArg(getRoot(), getValue(I.getOperand(0)), I.getOperand(0), 985558bc88a00930fce283b240b7c9555f649a18f1bAndrew Lenharth I.getType(), DAG); 98639ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner setValue(&I, Result.first); 98739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner DAG.setRoot(Result.second); 9881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVAEnd(CallInst &I) { 99100b16889ab461b7ecef1c91ade101186b7f1fce2Jeff Cohen DAG.setRoot(TLI.LowerVAEnd(getRoot(), getValue(I.getOperand(1)), 992e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner I.getOperand(1), DAG)); 9931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 9941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 9951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGLowering::visitVACopy(CallInst &I) { 996e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner SDOperand Result = 997e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner TLI.LowerVACopy(getRoot(), getValue(I.getOperand(2)), I.getOperand(2), 998e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner getValue(I.getOperand(1)), I.getOperand(1), DAG); 999e64e72b794cfa385372436b3c88460aeee0acbf6Chris Lattner DAG.setRoot(Result); 10001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 10011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 100339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner// It is always conservatively correct for llvm.returnaddress and 100439ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner// llvm.frameaddress to return 0. 100539ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnerstd::pair<SDOperand, SDOperand> 100639ae3622791986a0232f7e4797b633f8fa9e54d2Chris LattnerTargetLowering::LowerFrameReturnAddress(bool isFrameAddr, SDOperand Chain, 100739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner unsigned Depth, SelectionDAG &DAG) { 100839ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner return std::make_pair(DAG.getConstant(0, getPointerTy()), Chain); 10091c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 10101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 101150381b6c4180e9a2b983d4623da2e485cd768632Chris LattnerSDOperand TargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG) { 1012171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner assert(0 && "LowerOperation not implemented for this target!"); 1013171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner abort(); 1014d3f03e4b50feb6abfa9fec8b0aa705d45134c59eMisha Brukman return SDOperand(); 1015171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner} 1016171453a284b097f1ee89fb87ff495c3a6c7b6297Chris Lattner 101739ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattnervoid SelectionDAGLowering::visitFrameReturnAddress(CallInst &I, bool isFrame) { 101839ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner unsigned Depth = (unsigned)cast<ConstantUInt>(I.getOperand(1))->getValue(); 101939ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner std::pair<SDOperand,SDOperand> Result = 1020a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner TLI.LowerFrameReturnAddress(isFrame, getRoot(), Depth, DAG); 102139ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner setValue(&I, Result.first); 102239ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner DAG.setRoot(Result.second); 102339ae3622791986a0232f7e4797b633f8fa9e54d2Chris Lattner} 10241c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10257041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattnervoid SelectionDAGLowering::visitMemIntrinsic(CallInst &I, unsigned Op) { 10267041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner std::vector<SDOperand> Ops; 1027a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner Ops.push_back(getRoot()); 10287041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner Ops.push_back(getValue(I.getOperand(1))); 10297041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner Ops.push_back(getValue(I.getOperand(2))); 10307041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner Ops.push_back(getValue(I.getOperand(3))); 10317041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner Ops.push_back(getValue(I.getOperand(4))); 10327041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner DAG.setRoot(DAG.getNode(Op, MVT::Other, Ops)); 10331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 10341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10357041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner//===----------------------------------------------------------------------===// 10367041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner// SelectionDAGISel code 10377041ee35adecb864e3e8df490aa73b0605fbfb5aChris Lattner//===----------------------------------------------------------------------===// 10381c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10391c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerunsigned SelectionDAGISel::MakeReg(MVT::ValueType VT) { 10401c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return RegMap->createVirtualRegister(TLI.getRegClassFor(VT)); 10411c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 10421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1043495a0b51915eb763576874f29192820b731edc22Chris Lattnervoid SelectionDAGISel::getAnalysisUsage(AnalysisUsage &AU) const { 104436b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner // FIXME: we only modify the CFG to split critical edges. This 104536b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner // updates dom and loop info. 1046495a0b51915eb763576874f29192820b731edc22Chris Lattner} 10471c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10481c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10491c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnerbool SelectionDAGISel::runOnFunction(Function &Fn) { 10501c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineFunction &MF = MachineFunction::construct(&Fn, TLI.getTargetMachine()); 10511c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner RegMap = MF.getSSARegMap(); 10521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "\n\n\n=== " << Fn.getName() << "\n"); 10531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1054495a0b51915eb763576874f29192820b731edc22Chris Lattner // First pass, split all critical edges for PHI nodes with incoming values 1055495a0b51915eb763576874f29192820b731edc22Chris Lattner // that are constants, this way the load of the constant into a vreg will not 1056495a0b51915eb763576874f29192820b731edc22Chris Lattner // be placed into MBBs that are used some other way. 105736b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner for (Function::iterator BB = Fn.begin(), E = Fn.end(); BB != E; ++BB) { 105836b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner PHINode *PN; 105936b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner for (BasicBlock::iterator BBI = BB->begin(); 106036b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner (PN = dyn_cast<PHINode>(BBI)); ++BBI) 106136b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner for (unsigned i = 0, e = PN->getNumIncomingValues(); i != e; ++i) 106236b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner if (isa<Constant>(PN->getIncomingValue(i))) 106336b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner SplitCriticalEdge(PN->getIncomingBlock(i), BB); 106436b708f05720c407f5e5657f2fd4b0677702ad46Chris Lattner } 1065495a0b51915eb763576874f29192820b731edc22Chris Lattner 10661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo FuncInfo(TLI, Fn, MF); 10671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (Function::iterator I = Fn.begin(), E = Fn.end(); I != E; ++I) 10691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SelectBasicBlock(I, MF, FuncInfo); 1070edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 10711c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner return true; 10721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 10731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 10741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1075ddb870b065984007a0df645ad97c6ad6a6f12de0Chris LattnerSDOperand SelectionDAGISel:: 1076ddb870b065984007a0df645ad97c6ad6a6f12de0Chris LattnerCopyValueToVirtualRegister(SelectionDAGLowering &SDL, Value *V, unsigned Reg) { 1077f1fdacae8c1bd9e5ff4619546b3a28e93fb75ab5Chris Lattner SDOperand Op = SDL.getValue(V); 107818c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner assert((Op.getOpcode() != ISD::CopyFromReg || 1079d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner cast<RegisterSDNode>(Op.getOperand(1))->getReg() != Reg) && 108018c2f13e0f9d0e5d6227cf6d1881e9ee3d1b6109Chris Lattner "Copy from a reg to the same reg!"); 1081d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner 1082d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // If this type is not legal, we must make sure to not create an invalid 1083d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // register use. 1084d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType SrcVT = Op.getValueType(); 1085d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner MVT::ValueType DestVT = TLI.getTypeToTransformTo(SrcVT); 1086d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SelectionDAG &DAG = SDL.DAG; 1087d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner if (SrcVT == DestVT) { 1088d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(SDL.getRoot(), Reg, Op); 1089d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else if (SrcVT < DestVT) { 1090d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // The src value is promoted to the register. 1091fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner if (MVT::isFloatingPoint(SrcVT)) 1092fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner Op = DAG.getNode(ISD::FP_EXTEND, DestVT, Op); 1093fae59b99b8d1942f30a4be609423282c3fd62dd8Chris Lattner else 1094fab08875b73656f373b10a59aad475615df82bafChris Lattner Op = DAG.getNode(ISD::ANY_EXTEND, DestVT, Op); 1095d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(SDL.getRoot(), Reg, Op); 1096d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } else { 1097d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner // The src value is expanded into multiple registers. 1098d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SDOperand Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, DestVT, 1099d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op, DAG.getConstant(0, MVT::i32)); 1100d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner SDOperand Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, DestVT, 1101d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op, DAG.getConstant(1, MVT::i32)); 1102d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner Op = DAG.getCopyToReg(SDL.getRoot(), Reg, Lo); 1103d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner return DAG.getCopyToReg(Op, Reg+1, Hi); 1104d5d0f9bd20d9df07d6b4d41b7e8ed6d33b6a649dChris Lattner } 11051c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 11061c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1107068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattnervoid SelectionDAGISel:: 1108068a81e9fca511b9a3b3a0f28a8988a57f994652Chris LattnerLowerArguments(BasicBlock *BB, SelectionDAGLowering &SDL, 1109068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<SDOperand> &UnorderedChains) { 11101c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // If this is the entry block, emit arguments. 1111068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner Function &F = *BB->getParent(); 11120afa8e348eab21d3e09ae3240544886d61879266Chris Lattner FunctionLoweringInfo &FuncInfo = SDL.FuncInfo; 1113bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SDOperand OldRoot = SDL.DAG.getRoot(); 1114bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner std::vector<SDOperand> Args = TLI.LowerArguments(F, SDL.DAG); 1115bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 1116bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner unsigned a = 0; 1117bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner for (Function::arg_iterator AI = F.arg_begin(), E = F.arg_end(); 1118bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner AI != E; ++AI, ++a) 1119bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (!AI->use_empty()) { 1120bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SDL.setValue(AI, Args[a]); 1121fa57702388f139e964befecb4b98c7dfe836945fChris Lattner 1122bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // If this argument is live outside of the entry block, insert a copy from 1123bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // whereever we got it to the vreg that other BB's will reference it as. 1124bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (FuncInfo.ValueMap.count(AI)) { 1125bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SDOperand Copy = 1126bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner CopyValueToVirtualRegister(SDL, AI, FuncInfo.ValueMap[AI]); 1127bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner UnorderedChains.push_back(Copy); 1128bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner } 11290afa8e348eab21d3e09ae3240544886d61879266Chris Lattner } 1130bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 1131bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Next, if the function has live ins that need to be copied into vregs, 1132bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // emit the copies now, into the top of the block. 1133bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner MachineFunction &MF = SDL.DAG.getMachineFunction(); 1134bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (MF.livein_begin() != MF.livein_end()) { 1135bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner SSARegMap *RegMap = MF.getSSARegMap(); 1136bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner const MRegisterInfo &MRI = *MF.getTarget().getRegisterInfo(); 1137bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner for (MachineFunction::livein_iterator LI = MF.livein_begin(), 1138bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner E = MF.livein_end(); LI != E; ++LI) 1139bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (LI->second) 1140bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner MRI.copyRegToReg(*MF.begin(), MF.begin()->end(), LI->second, 1141bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner LI->first, RegMap->getRegClass(LI->second)); 11421c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1143bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner 1144bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Finally, if the target has anything special to do, allow it to do so. 1145bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner EmitFunctionEntryCode(F, SDL.DAG.getMachineFunction()); 1146068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner} 1147068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 1148068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 1149068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattnervoid SelectionDAGISel::BuildSelectionDAG(SelectionDAG &DAG, BasicBlock *LLVMBB, 1150068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<std::pair<MachineInstr*, unsigned> > &PHINodesToUpdate, 1151068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner FunctionLoweringInfo &FuncInfo) { 1152068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner SelectionDAGLowering SDL(DAG, TLI, FuncInfo); 1153068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner 1154068a81e9fca511b9a3b3a0f28a8988a57f994652Chris Lattner std::vector<SDOperand> UnorderedChains; 1155edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1156bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner // Lower any arguments needed in this block if this is the entry block. 1157bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner if (LLVMBB == &LLVMBB->getParent()->front()) 1158bf209489ad3f7a38ce6b2159b22d8727500e60c2Chris Lattner LowerArguments(LLVMBB, SDL, UnorderedChains); 11591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 11601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BB = FuncInfo.MBBMap[LLVMBB]; 11611c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.setCurrentBasicBlock(BB); 11621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 11631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Lower all of the non-terminator instructions. 11641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = LLVMBB->begin(), E = --LLVMBB->end(); 11651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner I != E; ++I) 11661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.visit(*I); 11671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 11681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Ensure that all instructions which are used outside of their defining 11691c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // blocks are available as virtual registers. 11701c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = LLVMBB->begin(), E = LLVMBB->end(); I != E;++I) 1171f1fdacae8c1bd9e5ff4619546b3a28e93fb75ab5Chris Lattner if (!I->use_empty() && !isa<PHINode>(I)) { 1172ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner std::map<const Value*, unsigned>::iterator VMI =FuncInfo.ValueMap.find(I); 11731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner if (VMI != FuncInfo.ValueMap.end()) 1174ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 1175ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, I, VMI->second)); 11761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 11771c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 11781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Handle PHI nodes in successor blocks. Emit code into the SelectionDAG to 11791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // ensure constants are generated when needed. Remember the virtual registers 11801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // that need to be added to the Machine PHI nodes as input. We cannot just 11811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // directly add them, because expansion might result in multiple MBB's for one 11821c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // BB. As such, the start of the BB might correspond to a different MBB than 11831c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the end. 1184edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman // 11851c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 11861c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Emit constants only once even if used by multiple PHI nodes. 11871c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::map<Constant*, unsigned> ConstantsOut; 11881c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 11891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Check successor nodes PHI nodes that expect a constant to be available from 11901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // this block. 11911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner TerminatorInst *TI = LLVMBB->getTerminator(); 11921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned succ = 0, e = TI->getNumSuccessors(); succ != e; ++succ) { 11931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BasicBlock *SuccBB = TI->getSuccessor(succ); 11941c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineBasicBlock::iterator MBBI = FuncInfo.MBBMap[SuccBB]->begin(); 11951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHINode *PN; 11961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 11971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // At this point we know that there is a 1-1 correspondence between LLVM PHI 11981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // nodes and Machine PHI nodes, but the incoming operands have not been 11991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // emitted yet. 12001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (BasicBlock::iterator I = SuccBB->begin(); 1201f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner (PN = dyn_cast<PHINode>(I)); ++I) 1202f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (!PN->use_empty()) { 1203f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned Reg; 1204f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Value *PHIOp = PN->getIncomingValueForBlock(LLVMBB); 1205f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (Constant *C = dyn_cast<Constant>(PHIOp)) { 1206f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned &RegOut = ConstantsOut[C]; 1207f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner if (RegOut == 0) { 1208f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner RegOut = FuncInfo.CreateRegForValue(C); 1209ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 1210ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, C, RegOut)); 1211f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } 1212f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Reg = RegOut; 1213f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner } else { 1214f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner Reg = FuncInfo.ValueMap[PHIOp]; 1215ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner if (Reg == 0) { 1216edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman assert(isa<AllocaInst>(PHIOp) && 1217ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner FuncInfo.StaticAllocaMap.count(cast<AllocaInst>(PHIOp)) && 1218ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner "Didn't codegen value into a register!??"); 1219ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner Reg = FuncInfo.CreateRegForValue(PHIOp); 1220ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner UnorderedChains.push_back( 1221ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner CopyValueToVirtualRegister(SDL, PHIOp, Reg)); 1222ee749d7488bd42df0f67e2d80048c63415943785Chris Lattner } 12231c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1224edf128a7fa90f2b0b7ee24741a04a7ae1ecd6f7eMisha Brukman 1225f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner // Remember that this register needs to added to the machine PHI node as 1226f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner // the input for this MBB. 1227f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner unsigned NumElements = 1228f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner TLI.getNumElements(TLI.getValueType(PN->getType())); 1229f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner for (unsigned i = 0, e = NumElements; i != e; ++i) 1230f44fd88e9cdd7b47acb71ac78e3dccb91319c72dChris Lattner PHINodesToUpdate.push_back(std::make_pair(MBBI++, Reg+i)); 12311c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 12321c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 12331c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner ConstantsOut.clear(); 12341c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1235ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner // Turn all of the unordered chains into one factored node. 12365a6c6d98d561df671350a56c8031a3611f1c46faChris Lattner if (!UnorderedChains.empty()) { 12377436b57de32333cc337b8c7cea208c8863eee793Chris Lattner SDOperand Root = SDL.getRoot(); 12387436b57de32333cc337b8c7cea208c8863eee793Chris Lattner if (Root.getOpcode() != ISD::EntryToken) { 12397436b57de32333cc337b8c7cea208c8863eee793Chris Lattner unsigned i = 0, e = UnorderedChains.size(); 12407436b57de32333cc337b8c7cea208c8863eee793Chris Lattner for (; i != e; ++i) { 12417436b57de32333cc337b8c7cea208c8863eee793Chris Lattner assert(UnorderedChains[i].Val->getNumOperands() > 1); 12427436b57de32333cc337b8c7cea208c8863eee793Chris Lattner if (UnorderedChains[i].Val->getOperand(0) == Root) 12437436b57de32333cc337b8c7cea208c8863eee793Chris Lattner break; // Don't add the root if we already indirectly depend on it. 12447436b57de32333cc337b8c7cea208c8863eee793Chris Lattner } 12457436b57de32333cc337b8c7cea208c8863eee793Chris Lattner 12467436b57de32333cc337b8c7cea208c8863eee793Chris Lattner if (i == e) 12477436b57de32333cc337b8c7cea208c8863eee793Chris Lattner UnorderedChains.push_back(Root); 12487436b57de32333cc337b8c7cea208c8863eee793Chris Lattner } 1249ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner DAG.setRoot(DAG.getNode(ISD::TokenFactor, MVT::Other, UnorderedChains)); 1250ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner } 1251ddb870b065984007a0df645ad97c6ad6a6f12de0Chris Lattner 12521c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Lower the terminator after the copies are emitted. 12531c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner SDL.visit(*LLVMBB->getTerminator()); 1254a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner 1255a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner // Make sure the root of the DAG is up-to-date. 1256a651cf67b77cd477dd7da4baa8688af2ccd4f7f6Chris Lattner DAG.setRoot(SDL.getRoot()); 12571c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 12581c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12591c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattnervoid SelectionDAGISel::SelectBasicBlock(BasicBlock *LLVMBB, MachineFunction &MF, 12601c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner FunctionLoweringInfo &FuncInfo) { 1261ac9dc08c7f0ae60c125624d72c3022025d79ee9eChris Lattner SelectionDAG DAG(TLI, MF); 12621c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner CurDAG = &DAG; 12631c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner std::vector<std::pair<MachineInstr*, unsigned> > PHINodesToUpdate; 12641c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12651c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // First step, lower LLVM code to some DAG. This DAG may use operations and 12661c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // types that are not supported by the target. 12671c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner BuildSelectionDAG(DAG, LLVMBB, PHINodesToUpdate, FuncInfo); 12681c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1269af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner // Run the DAG combiner in pre-legalize mode. 1270af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner DAG.Combine(false); 12712300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman 12721c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Lowered selection DAG:\n"); 12731c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(DAG.dump()); 12741c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12751c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // Second step, hack on the DAG until it only uses operations and types that 12761c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // the target supports. 1277ac9dc08c7f0ae60c125624d72c3022025d79ee9eChris Lattner DAG.Legalize(); 12781c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12791c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Legalized selection DAG:\n"); 12801c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(DAG.dump()); 12811c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1282af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner // Run the DAG combiner in post-legalize mode. 1283af21d55aee8d6852fedfd630395a3c7c95df8f12Chris Lattner DAG.Combine(true); 12842300f5504643eaddc307d3db8a3ccd224c4fa251Nate Begeman 1285d48050aa1509130871b8bb2453270c92b969c2e7Chris Lattner if (ViewDAGs) DAG.viewGraph(); 1286d48050aa1509130871b8bb2453270c92b969c2e7Chris Lattner 1287a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Third, instruction select all of the operations to machine code, adding the 1288a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // code to the MachineBasicBlock. 12891c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner InstructionSelectBasicBlock(DAG); 12901c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 12911c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(std::cerr << "Selected machine code:\n"); 12921c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner DEBUG(BB->dump()); 12931c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner 1294a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Next, now that we know what the last MBB the LLVM BB expanded is, update 12951c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner // PHI nodes in successors. 12961c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner for (unsigned i = 0, e = PHINodesToUpdate.size(); i != e; ++i) { 12971c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner MachineInstr *PHI = PHINodesToUpdate[i].first; 12981c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner assert(PHI->getOpcode() == TargetInstrInfo::PHI && 12991c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner "This is not a machine PHI node that we are updating!"); 13001c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHI->addRegOperand(PHINodesToUpdate[i].second); 13011c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner PHI->addMachineBasicBlockOperand(BB); 13021c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner } 1303a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner 1304a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // Finally, add the CFG edges from the last selected MBB to the successor 1305a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner // MBBs. 1306a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner TerminatorInst *TI = LLVMBB->getTerminator(); 1307a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner for (unsigned i = 0, e = TI->getNumSuccessors(); i != e; ++i) { 1308a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner MachineBasicBlock *Succ0MBB = FuncInfo.MBBMap[TI->getSuccessor(i)]; 1309a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner BB->addSuccessor(Succ0MBB); 1310a33ef4816d2c192e36e7c025d18c66e89ef9d311Chris Lattner } 13111c08c714bb3d07c3b39f06bfcbb4559fefca73f9Chris Lattner} 1312