lib/Target/ARM/ARMTargetMachine.cpp

   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 "ARMMCAsmInfo.h"
  15 #include "ARMFrameInfo.h"
  16 #include "ARM.h"
  17 #include "llvm/PassManager.h"
  18 #include "llvm/CodeGen/Passes.h"
  19 #include "llvm/Support/CommandLine.h"
  20 #include "llvm/Support/FormattedStream.h"
  21 #include "llvm/Target/TargetOptions.h"
  22 #include "llvm/Target/TargetRegistry.h"
  23 using namespace llvm;
  24
  25 static cl::opt<bool> DisableLdStOpti("disable-arm-loadstore-opti", cl::Hidden,
  26                               cl::desc("Disable load store optimization pass"));
  27 static cl::opt<bool> DisableIfConversion("disable-arm-if-conversion",cl::Hidden,
  28                               cl::desc("Disable if-conversion pass"));
  29
  30 static const MCAsmInfo *createMCAsmInfo(const Target &T,
  31                                         const StringRef &TT) {
  32   Triple TheTriple(TT);
  33   switch (TheTriple.getOS()) {
  34   case Triple::Darwin:
  35     return new ARMMCAsmInfoDarwin();
  36   default:
  37     return new ARMELFMCAsmInfo();
  38   }
  39 }
  40
  41
  42 extern "C" void LLVMInitializeARMTarget() {
  43   // Register the target.
  44   RegisterTargetMachine<ARMTargetMachine> X(TheARMTarget);
  45   RegisterTargetMachine<ThumbTargetMachine> Y(TheThumbTarget);
  46
  47   // Register the target asm info.
  48   RegisterAsmInfoFn A(TheARMTarget, createMCAsmInfo);
  49   RegisterAsmInfoFn B(TheThumbTarget, createMCAsmInfo);
  50 }
  51
  52 /// TargetMachine ctor - Create an ARM architecture model.
  53 ///
  54 ARMBaseTargetMachine::ARMBaseTargetMachine(const Target &T,
  55                                            const std::string &TT,
  56                                            const std::string &FS,
  57                                            bool isThumb)
  58   : LLVMTargetMachine(T, TT),
  59     Subtarget(TT, FS, isThumb),
  60     FrameInfo(Subtarget),
  61     JITInfo(),
  62     InstrItins(Subtarget.getInstrItineraryData()) {
  63   DefRelocModel = getRelocationModel();
  64 }
  65
  66 ARMTargetMachine::ARMTargetMachine(const Target &T, const std::string &TT,
  67                                    const std::string &FS)
  68   : ARMBaseTargetMachine(T, TT, FS, false), InstrInfo(Subtarget),
  69     DataLayout(Subtarget.isAPCS_ABI() ?
  70                std::string("e-p:32:32-f64:32:32-i64:32:32") :
  71                std::string("e-p:32:32-f64:64:64-i64:64:64")),
  72     TLInfo(*this) {
  73 }
  74
  75 ThumbTargetMachine::ThumbTargetMachine(const Target &T, const std::string &TT,
  76                                        const std::string &FS)
  77   : ARMBaseTargetMachine(T, TT, FS, true),
  78     InstrInfo(Subtarget.hasThumb2()
  79               ? ((ARMBaseInstrInfo*)new Thumb2InstrInfo(Subtarget))
  80               : ((ARMBaseInstrInfo*)new Thumb1InstrInfo(Subtarget))),
  81     DataLayout(Subtarget.isAPCS_ABI() ?
  82                std::string("e-p:32:32-f64:32:32-i64:32:32-"
  83                            "i16:16:32-i8:8:32-i1:8:32-a:0:32") :
  84                std::string("e-p:32:32-f64:64:64-i64:64:64-"
  85                            "i16:16:32-i8:8:32-i1:8:32-a:0:32")),
  86     TLInfo(*this) {
  87 }
  88
  89
  90
  91 // Pass Pipeline Configuration
  92 bool ARMBaseTargetMachine::addInstSelector(PassManagerBase &PM,
  93                                            CodeGenOpt::Level OptLevel) {
  94   PM.add(createARMISelDag(*this));
  95   return false;
  96 }
  97
  98 bool ARMBaseTargetMachine::addPreRegAlloc(PassManagerBase &PM,
  99                                           CodeGenOpt::Level OptLevel) {
 100   if (Subtarget.hasNEON())
 101     PM.add(createNEONPreAllocPass());
 102
 103   // FIXME: temporarily disabling load / store optimization pass for Thumb mode.
 104   if (OptLevel != CodeGenOpt::None && !DisableLdStOpti && !Subtarget.isThumb())
 105     PM.add(createARMLoadStoreOptimizationPass(true));
 106   return true;
 107 }
 108
 109 bool ARMBaseTargetMachine::addPreEmitPass(PassManagerBase &PM,
 110                                           CodeGenOpt::Level OptLevel) {
 111   // FIXME: temporarily disabling load / store optimization pass for Thumb1 mode.
 112   if (OptLevel != CodeGenOpt::None && !DisableLdStOpti &&
 113       !Subtarget.isThumb1Only())
 114     PM.add(createARMLoadStoreOptimizationPass());
 115
 116   if (OptLevel != CodeGenOpt::None &&
 117       !DisableIfConversion && !Subtarget.isThumb1Only())
 118     PM.add(createIfConverterPass());
 119
 120   if (Subtarget.isThumb2()) {
 121     PM.add(createThumb2ITBlockPass());
 122     PM.add(createThumb2SizeReductionPass());
 123   }
 124
 125   PM.add(createARMConstantIslandPass());
 126   return true;
 127 }
 128
 129 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
 130                                           CodeGenOpt::Level OptLevel,
 131                                           MachineCodeEmitter &MCE) {
 132   // FIXME: Move this to TargetJITInfo!
 133   if (DefRelocModel == Reloc::Default)
 134     setRelocationModel(Reloc::Static);
 135
 136   // Machine code emitter pass for ARM.
 137   PM.add(createARMCodeEmitterPass(*this, MCE));
 138   return false;
 139 }
 140
 141 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
 142                                           CodeGenOpt::Level OptLevel,
 143                                           JITCodeEmitter &JCE) {
 144   // FIXME: Move this to TargetJITInfo!
 145   if (DefRelocModel == Reloc::Default)
 146     setRelocationModel(Reloc::Static);
 147
 148   // Machine code emitter pass for ARM.
 149   PM.add(createARMJITCodeEmitterPass(*this, JCE));
 150   return false;
 151 }
 152
 153 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
 154                                           CodeGenOpt::Level OptLevel,
 155                                           ObjectCodeEmitter &OCE) {
 156   // FIXME: Move this to TargetJITInfo!
 157   if (DefRelocModel == Reloc::Default)
 158     setRelocationModel(Reloc::Static);
 159
 160   // Machine code emitter pass for ARM.
 161   PM.add(createARMObjectCodeEmitterPass(*this, OCE));
 162   return false;
 163 }
 164
 165 bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 166                                                 CodeGenOpt::Level OptLevel,
 167                                                 MachineCodeEmitter &MCE) {
 168   // Machine code emitter pass for ARM.
 169   PM.add(createARMCodeEmitterPass(*this, MCE));
 170   return false;
 171 }
 172
 173 bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 174                                                 CodeGenOpt::Level OptLevel,
 175                                                 JITCodeEmitter &JCE) {
 176   // Machine code emitter pass for ARM.
 177   PM.add(createARMJITCodeEmitterPass(*this, JCE));
 178   return false;
 179 }
 180
 181 bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 182                                             CodeGenOpt::Level OptLevel,
 183                                             ObjectCodeEmitter &OCE) {
 184   // Machine code emitter pass for ARM.
 185   PM.add(createARMObjectCodeEmitterPass(*this, OCE));
 186   return false;
 187 }
 188