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/FormattedStream.h"
  20 #include "llvm/Target/TargetOptions.h"
  21 #include "llvm/Target/TargetRegistry.h"
  22 using namespace llvm;
  23
  24 static const MCAsmInfo *createMCAsmInfo(const Target &T, StringRef TT) {
  25   Triple TheTriple(TT);
  26   switch (TheTriple.getOS()) {
  27   case Triple::Darwin:
  28     return new ARMMCAsmInfoDarwin();
  29   default:
  30     return new ARMELFMCAsmInfo();
  31   }
  32 }
  33
  34
  35 extern "C" void LLVMInitializeARMTarget() {
  36   // Register the target.
  37   RegisterTargetMachine<ARMTargetMachine> X(TheARMTarget);
  38   RegisterTargetMachine<ThumbTargetMachine> Y(TheThumbTarget);
  39
  40   // Register the target asm info.
  41   RegisterAsmInfoFn A(TheARMTarget, createMCAsmInfo);
  42   RegisterAsmInfoFn B(TheThumbTarget, createMCAsmInfo);
  43 }
  44
  45 /// TargetMachine ctor - Create an ARM architecture model.
  46 ///
  47 ARMBaseTargetMachine::ARMBaseTargetMachine(const Target &T,
  48                                            const std::string &TT,
  49                                            const std::string &FS,
  50                                            bool isThumb)
  51   : LLVMTargetMachine(T, TT),
  52     Subtarget(TT, FS, isThumb),
  53     FrameInfo(Subtarget),
  54     JITInfo(),
  55     InstrItins(Subtarget.getInstrItineraryData()) {
  56   DefRelocModel = getRelocationModel();
  57 }
  58
  59 ARMTargetMachine::ARMTargetMachine(const Target &T, const std::string &TT,
  60                                    const std::string &FS)
  61   : ARMBaseTargetMachine(T, TT, FS, false), InstrInfo(Subtarget),
  62     DataLayout(Subtarget.isAPCS_ABI() ?
  63                std::string("e-p:32:32-f64:32:32-i64:32:32-n32") :
  64                std::string("e-p:32:32-f64:64:64-i64:64:64-n32")),
  65     TLInfo(*this) {
  66 }
  67
  68 ThumbTargetMachine::ThumbTargetMachine(const Target &T, const std::string &TT,
  69                                        const std::string &FS)
  70   : ARMBaseTargetMachine(T, TT, FS, true),
  71     InstrInfo(Subtarget.hasThumb2()
  72               ? ((ARMBaseInstrInfo*)new Thumb2InstrInfo(Subtarget))
  73               : ((ARMBaseInstrInfo*)new Thumb1InstrInfo(Subtarget))),
  74     DataLayout(Subtarget.isAPCS_ABI() ?
  75                std::string("e-p:32:32-f64:32:32-i64:32:32-"
  76                            "i16:16:32-i8:8:32-i1:8:32-a:0:32-n32") :
  77                std::string("e-p:32:32-f64:64:64-i64:64:64-"
  78                            "i16:16:32-i8:8:32-i1:8:32-a:0:32-n32")),
  79     TLInfo(*this) {
  80 }
  81
  82
  83
  84 // Pass Pipeline Configuration
  85 bool ARMBaseTargetMachine::addInstSelector(PassManagerBase &PM,
  86                                            CodeGenOpt::Level OptLevel) {
  87   PM.add(createARMISelDag(*this, OptLevel));
  88   return false;
  89 }
  90
  91 bool ARMBaseTargetMachine::addPreRegAlloc(PassManagerBase &PM,
  92                                           CodeGenOpt::Level OptLevel) {
  93   if (Subtarget.hasNEON())
  94     PM.add(createNEONPreAllocPass());
  95
  96   // Calculate and set max stack object alignment early, so we can decide
  97   // whether we will need stack realignment (and thus FP).
  98   PM.add(createMaxStackAlignmentCalculatorPass());
  99
 100   // FIXME: temporarily disabling load / store optimization pass for Thumb1.
 101   if (OptLevel != CodeGenOpt::None && !Subtarget.isThumb1Only())
 102     PM.add(createARMLoadStoreOptimizationPass(true));
 103   return true;
 104 }
 105
 106 bool ARMBaseTargetMachine::addPreSched2(PassManagerBase &PM,
 107                                         CodeGenOpt::Level OptLevel) {
 108   // FIXME: temporarily disabling load / store optimization pass for Thumb1.
 109   if (OptLevel != CodeGenOpt::None && !Subtarget.isThumb1Only())
 110     PM.add(createARMLoadStoreOptimizationPass());
 111
 112   // Expand some pseudo instructions into multiple instructions to allow
 113   // proper scheduling.
 114   PM.add(createARMExpandPseudoPass());
 115
 116   return true;
 117 }
 118
 119 bool ARMBaseTargetMachine::addPreEmitPass(PassManagerBase &PM,
 120                                           CodeGenOpt::Level OptLevel) {
 121   // FIXME: temporarily disabling load / store optimization pass for Thumb1.
 122   if (OptLevel != CodeGenOpt::None) {
 123     if (!Subtarget.isThumb1Only())
 124       PM.add(createIfConverterPass());
 125     if (Subtarget.hasNEON())
 126       PM.add(createNEONMoveFixPass());
 127   }
 128
 129   if (Subtarget.isThumb2()) {
 130     PM.add(createThumb2ITBlockPass());
 131     PM.add(createThumb2SizeReductionPass());
 132   }
 133
 134   PM.add(createARMConstantIslandPass());
 135   return true;
 136 }
 137
 138 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
 139                                           CodeGenOpt::Level OptLevel,
 140                                           MachineCodeEmitter &MCE) {
 141   // FIXME: Move this to TargetJITInfo!
 142   if (DefRelocModel == Reloc::Default)
 143     setRelocationModel(Reloc::Static);
 144
 145   // Machine code emitter pass for ARM.
 146   PM.add(createARMCodeEmitterPass(*this, MCE));
 147   return false;
 148 }
 149
 150 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
 151                                           CodeGenOpt::Level OptLevel,
 152                                           JITCodeEmitter &JCE) {
 153   // FIXME: Move this to TargetJITInfo!
 154   if (DefRelocModel == Reloc::Default)
 155     setRelocationModel(Reloc::Static);
 156
 157   // Machine code emitter pass for ARM.
 158   PM.add(createARMJITCodeEmitterPass(*this, JCE));
 159   return false;
 160 }
 161
 162 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
 163                                           CodeGenOpt::Level OptLevel,
 164                                           ObjectCodeEmitter &OCE) {
 165   // FIXME: Move this to TargetJITInfo!
 166   if (DefRelocModel == Reloc::Default)
 167     setRelocationModel(Reloc::Static);
 168
 169   // Machine code emitter pass for ARM.
 170   PM.add(createARMObjectCodeEmitterPass(*this, OCE));
 171   return false;
 172 }
 173
 174 bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 175                                                 CodeGenOpt::Level OptLevel,
 176                                                 MachineCodeEmitter &MCE) {
 177   // Machine code emitter pass for ARM.
 178   PM.add(createARMCodeEmitterPass(*this, MCE));
 179   return false;
 180 }
 181
 182 bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 183                                                 CodeGenOpt::Level OptLevel,
 184                                                 JITCodeEmitter &JCE) {
 185   // Machine code emitter pass for ARM.
 186   PM.add(createARMJITCodeEmitterPass(*this, JCE));
 187   return false;
 188 }
 189
 190 bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 191                                             CodeGenOpt::Level OptLevel,
 192                                             ObjectCodeEmitter &OCE) {
 193   // Machine code emitter pass for ARM.
 194   PM.add(createARMObjectCodeEmitterPass(*this, OCE));
 195   return false;
 196 }
 197