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 "ARMTargetAsmInfo.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 TargetAsmInfo *createTargetAsmInfo(const Target &T,
  31                                                 const StringRef &TT) {
  32   Triple TheTriple(TT);
  33   switch (TheTriple.getOS()) {
  34   case Triple::Darwin:
  35     return new ARMDarwinTargetAsmInfo(TheTriple);
  36   default:
  37     return new ARMELFTargetAsmInfo();
  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, createTargetAsmInfo);
  49   RegisterAsmInfoFn B(TheThumbTarget, createTargetAsmInfo);
  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     DataLayout(Subtarget.isAPCS_ABI() ?
  79                std::string("e-p:32:32-f64:32:32-i64:32:32-"
  80                            "i16:16:32-i8:8:32-i1:8:32-a:0:32") :
  81                std::string("e-p:32:32-f64:64:64-i64:64:64-"
  82                            "i16:16:32-i8:8:32-i1:8:32-a:0:32")),
  83     TLInfo(*this) {
  84   // Create the approriate type of Thumb InstrInfo
  85   if (Subtarget.hasThumb2())
  86     InstrInfo = new Thumb2InstrInfo(Subtarget);
  87   else
  88     InstrInfo = new Thumb1InstrInfo(Subtarget);
  89 }
  90
  91
  92
  93 // Pass Pipeline Configuration
  94 bool ARMBaseTargetMachine::addInstSelector(PassManagerBase &PM,
  95                                            CodeGenOpt::Level OptLevel) {
  96   PM.add(createARMISelDag(*this));
  97   return false;
  98 }
  99
 100 bool ARMBaseTargetMachine::addPreRegAlloc(PassManagerBase &PM,
 101                                           CodeGenOpt::Level OptLevel) {
 102   if (Subtarget.hasNEON())
 103     PM.add(createNEONPreAllocPass());
 104
 105   // FIXME: temporarily disabling load / store optimization pass for Thumb mode.
 106   if (OptLevel != CodeGenOpt::None && !DisableLdStOpti && !Subtarget.isThumb())
 107     PM.add(createARMLoadStoreOptimizationPass(true));
 108   return true;
 109 }
 110
 111 bool ARMBaseTargetMachine::addPreEmitPass(PassManagerBase &PM,
 112                                           CodeGenOpt::Level OptLevel) {
 113   // FIXME: temporarily disabling load / store optimization pass for Thumb1 mode.
 114   if (OptLevel != CodeGenOpt::None && !DisableLdStOpti &&
 115       !Subtarget.isThumb1Only())
 116     PM.add(createARMLoadStoreOptimizationPass());
 117
 118   if (OptLevel != CodeGenOpt::None &&
 119       !DisableIfConversion && !Subtarget.isThumb())
 120     PM.add(createIfConverterPass());
 121
 122   if (Subtarget.isThumb2()) {
 123     PM.add(createThumb2ITBlockPass());
 124     PM.add(createThumb2SizeReductionPass());
 125   }
 126
 127   PM.add(createARMConstantIslandPass());
 128   return true;
 129 }
 130
 131 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
 132                                           CodeGenOpt::Level OptLevel,
 133                                           MachineCodeEmitter &MCE) {
 134   // FIXME: Move this to TargetJITInfo!
 135   if (DefRelocModel == Reloc::Default)
 136     setRelocationModel(Reloc::Static);
 137
 138   // Machine code emitter pass for ARM.
 139   PM.add(createARMCodeEmitterPass(*this, MCE));
 140   return false;
 141 }
 142
 143 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
 144                                           CodeGenOpt::Level OptLevel,
 145                                           JITCodeEmitter &JCE) {
 146   // FIXME: Move this to TargetJITInfo!
 147   if (DefRelocModel == Reloc::Default)
 148     setRelocationModel(Reloc::Static);
 149
 150   // Machine code emitter pass for ARM.
 151   PM.add(createARMJITCodeEmitterPass(*this, JCE));
 152   return false;
 153 }
 154
 155 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
 156                                           CodeGenOpt::Level OptLevel,
 157                                           ObjectCodeEmitter &OCE) {
 158   // FIXME: Move this to TargetJITInfo!
 159   if (DefRelocModel == Reloc::Default)
 160     setRelocationModel(Reloc::Static);
 161
 162   // Machine code emitter pass for ARM.
 163   PM.add(createARMObjectCodeEmitterPass(*this, OCE));
 164   return false;
 165 }
 166
 167 bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 168                                                 CodeGenOpt::Level OptLevel,
 169                                                 MachineCodeEmitter &MCE) {
 170   // Machine code emitter pass for ARM.
 171   PM.add(createARMCodeEmitterPass(*this, MCE));
 172   return false;
 173 }
 174
 175 bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 176                                                 CodeGenOpt::Level OptLevel,
 177                                                 JITCodeEmitter &JCE) {
 178   // Machine code emitter pass for ARM.
 179   PM.add(createARMJITCodeEmitterPass(*this, JCE));
 180   return false;
 181 }
 182
 183 bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 184                                             CodeGenOpt::Level OptLevel,
 185                                             ObjectCodeEmitter &OCE) {
 186   // Machine code emitter pass for ARM.
 187   PM.add(createARMObjectCodeEmitterPass(*this, OCE));
 188   return false;
 189 }
 190