ARMTargetMachine.cpp revision 42bf74be1402df7409efbea089310d4c276fde37
1//===-- ARMTargetMachine.cpp - Define TargetMachine for ARM ---------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// 11//===----------------------------------------------------------------------===// 12 13#include "ARMTargetMachine.h" 14#include "ARMTargetAsmInfo.h" 15#include "ARMFrameInfo.h" 16#include "ARM.h" 17#include "llvm/Module.h" 18#include "llvm/PassManager.h" 19#include "llvm/CodeGen/Passes.h" 20#include "llvm/Support/CommandLine.h" 21#include "llvm/Support/raw_ostream.h" 22#include "llvm/Target/TargetMachineRegistry.h" 23#include "llvm/Target/TargetOptions.h" 24using namespace llvm; 25 26static cl::opt<bool> DisableLdStOpti("disable-arm-loadstore-opti", cl::Hidden, 27 cl::desc("Disable load store optimization pass")); 28static cl::opt<bool> DisableIfConversion("disable-arm-if-conversion",cl::Hidden, 29 cl::desc("Disable if-conversion pass")); 30 31/// ARMTargetMachineModule - Note that this is used on hosts that cannot link 32/// in a library unless there are references into the library. In particular, 33/// it seems that it is not possible to get things to work on Win32 without 34/// this. Though it is unused, do not remove it. 35extern "C" int ARMTargetMachineModule; 36int ARMTargetMachineModule = 0; 37 38// Register the target. 39static RegisterTarget<ARMTargetMachine> X("arm", "ARM"); 40static RegisterTarget<ThumbTargetMachine> Y("thumb", "Thumb"); 41 42// No assembler printer by default 43ARMTargetMachine::AsmPrinterCtorFn ARMTargetMachine::AsmPrinterCtor = 0; 44 45/// ThumbTargetMachine - Create an Thumb architecture model. 46/// 47unsigned ThumbTargetMachine::getJITMatchQuality() { 48#if defined(__thumb__) 49 return 10; 50#endif 51 return 0; 52} 53 54unsigned ThumbTargetMachine::getModuleMatchQuality(const Module &M) { 55 std::string TT = M.getTargetTriple(); 56 // Match thumb-foo-bar, as well as things like thumbv5blah-* 57 if (TT.size() >= 6 && 58 (TT.substr(0, 6) == "thumb-" || TT.substr(0, 6) == "thumbv")) 59 return 20; 60 61 // If the target triple is something non-thumb, we don't match. 62 if (!TT.empty()) return 0; 63 64 if (M.getEndianness() == Module::LittleEndian && 65 M.getPointerSize() == Module::Pointer32) 66 return 10; // Weak match 67 else if (M.getEndianness() != Module::AnyEndianness || 68 M.getPointerSize() != Module::AnyPointerSize) 69 return 0; // Match for some other target 70 71 return getJITMatchQuality()/2; 72} 73 74ThumbTargetMachine::ThumbTargetMachine(const Module &M, const std::string &FS) 75 : ARMTargetMachine(M, FS, true) { 76} 77 78/// TargetMachine ctor - Create an ARM architecture model. 79/// 80ARMTargetMachine::ARMTargetMachine(const Module &M, const std::string &FS, 81 bool isThumb) 82 : Subtarget(M, FS, isThumb), 83 DataLayout(Subtarget.isAPCS_ABI() ? 84 // APCS ABI 85 (isThumb ? 86 std::string("e-p:32:32-f64:32:32-i64:32:32-" 87 "i16:16:32-i8:8:32-i1:8:32-a:0:32") : 88 std::string("e-p:32:32-f64:32:32-i64:32:32")) : 89 // AAPCS ABI 90 (isThumb ? 91 std::string("e-p:32:32-f64:64:64-i64:64:64-" 92 "i16:16:32-i8:8:32-i1:8:32-a:0:32") : 93 std::string("e-p:32:32-f64:64:64-i64:64:64"))), 94 InstrInfo(Subtarget), 95 FrameInfo(Subtarget), 96 JITInfo(), 97 TLInfo(*this) { 98 DefRelocModel = getRelocationModel(); 99} 100 101unsigned ARMTargetMachine::getJITMatchQuality() { 102#if defined(__arm__) 103 return 10; 104#endif 105 return 0; 106} 107 108unsigned ARMTargetMachine::getModuleMatchQuality(const Module &M) { 109 std::string TT = M.getTargetTriple(); 110 // Match arm-foo-bar, as well as things like armv5blah-* 111 if (TT.size() >= 4 && 112 (TT.substr(0, 4) == "arm-" || TT.substr(0, 4) == "armv")) 113 return 20; 114 // If the target triple is something non-arm, we don't match. 115 if (!TT.empty()) return 0; 116 117 if (M.getEndianness() == Module::LittleEndian && 118 M.getPointerSize() == Module::Pointer32) 119 return 10; // Weak match 120 else if (M.getEndianness() != Module::AnyEndianness || 121 M.getPointerSize() != Module::AnyPointerSize) 122 return 0; // Match for some other target 123 124 return getJITMatchQuality()/2; 125} 126 127 128const TargetAsmInfo *ARMTargetMachine::createTargetAsmInfo() const { 129 switch (Subtarget.TargetType) { 130 case ARMSubtarget::isDarwin: 131 return new ARMDarwinTargetAsmInfo(*this); 132 case ARMSubtarget::isELF: 133 return new ARMELFTargetAsmInfo(*this); 134 default: 135 return new ARMGenericTargetAsmInfo(*this); 136 } 137} 138 139 140// Pass Pipeline Configuration 141bool ARMTargetMachine::addInstSelector(PassManagerBase &PM, bool Fast) { 142 PM.add(createARMISelDag(*this)); 143 return false; 144} 145 146bool ARMTargetMachine::addPreEmitPass(PassManagerBase &PM, bool Fast) { 147 // FIXME: temporarily disabling load / store optimization pass for Thumb mode. 148 if (!Fast && !DisableLdStOpti && !Subtarget.isThumb()) 149 PM.add(createARMLoadStoreOptimizationPass()); 150 151 if (!Fast && !DisableIfConversion && !Subtarget.isThumb()) 152 PM.add(createIfConverterPass()); 153 154 PM.add(createARMConstantIslandPass()); 155 return true; 156} 157 158bool ARMTargetMachine::addAssemblyEmitter(PassManagerBase &PM, bool Fast, 159 bool Verbose, raw_ostream &Out) { 160 // Output assembly language. 161 assert(AsmPrinterCtor && "AsmPrinter was not linked in"); 162 if (AsmPrinterCtor) 163 PM.add(AsmPrinterCtor(Out, *this, Fast, Verbose)); 164 165 return false; 166} 167 168 169bool ARMTargetMachine::addCodeEmitter(PassManagerBase &PM, bool Fast, 170 bool DumpAsm, MachineCodeEmitter &MCE) { 171 // FIXME: Move this to TargetJITInfo! 172 if (DefRelocModel == Reloc::Default) 173 setRelocationModel(Reloc::Static); 174 175 // Machine code emitter pass for ARM. 176 PM.add(createARMCodeEmitterPass(*this, MCE)); 177 if (DumpAsm) { 178 assert(AsmPrinterCtor && "AsmPrinter was not linked in"); 179 if (AsmPrinterCtor) 180 PM.add(AsmPrinterCtor(errs(), *this, Fast, true)); 181 } 182 183 return false; 184} 185 186bool ARMTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM, bool Fast, 187 bool DumpAsm, MachineCodeEmitter &MCE) { 188 // Machine code emitter pass for ARM. 189 PM.add(createARMCodeEmitterPass(*this, MCE)); 190 if (DumpAsm) { 191 assert(AsmPrinterCtor && "AsmPrinter was not linked in"); 192 if (AsmPrinterCtor) 193 PM.add(AsmPrinterCtor(errs(), *this, Fast, true)); 194 } 195 196 return false; 197} 198