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 extern "C" void LLVMInitializeARMTarget() {
  31   // Register the target.
  32   RegisterTargetMachine<ARMTargetMachine> X(TheARMTarget);
  33   RegisterTargetMachine<ThumbTargetMachine> Y(TheThumbTarget);
  34 }
  35
  36 /// TargetMachine ctor - Create an ARM architecture model.
  37 ///
  38 ARMBaseTargetMachine::ARMBaseTargetMachine(const Target &T,
  39                                            const std::string &TT,
  40                                            const std::string &FS,
  41                                            bool isThumb)
  42   : LLVMTargetMachine(T),
  43     Subtarget(TT, FS, isThumb),
  44     FrameInfo(Subtarget),
  45     JITInfo(),
  46     InstrItins(Subtarget.getInstrItineraryData()) {
  47   DefRelocModel = getRelocationModel();
  48 }
  49
  50 ARMTargetMachine::ARMTargetMachine(const Target &T, const std::string &TT,
  51                                    const std::string &FS)
  52   : ARMBaseTargetMachine(T, TT, FS, false), InstrInfo(Subtarget),
  53     DataLayout(Subtarget.isAPCS_ABI() ?
  54                std::string("e-p:32:32-f64:32:32-i64:32:32") :
  55                std::string("e-p:32:32-f64:64:64-i64:64:64")),
  56     TLInfo(*this) {
  57 }
  58
  59 ThumbTargetMachine::ThumbTargetMachine(const Target &T, const std::string &TT,
  60                                        const std::string &FS)
  61   : ARMBaseTargetMachine(T, TT, FS, true),
  62     DataLayout(Subtarget.isAPCS_ABI() ?
  63                std::string("e-p:32:32-f64:32:32-i64:32:32-"
  64                            "i16:16:32-i8:8:32-i1:8:32-a:0:32") :
  65                std::string("e-p:32:32-f64:64:64-i64:64:64-"
  66                            "i16:16:32-i8:8:32-i1:8:32-a:0:32")),
  67     TLInfo(*this) {
  68   // Create the approriate type of Thumb InstrInfo
  69   if (Subtarget.hasThumb2())
  70     InstrInfo = new Thumb2InstrInfo(Subtarget);
  71   else
  72     InstrInfo = new Thumb1InstrInfo(Subtarget);
  73 }
  74
  75
  76 const TargetAsmInfo *ARMBaseTargetMachine::createTargetAsmInfo() const {
  77   switch (Subtarget.TargetType) {
  78   default: llvm_unreachable("Unknown ARM subtarget kind");
  79   case ARMSubtarget::isDarwin:
  80     return new ARMDarwinTargetAsmInfo();
  81   case ARMSubtarget::isELF:
  82     return new ARMELFTargetAsmInfo();
  83   }
  84 }
  85
  86
  87 // Pass Pipeline Configuration
  88 bool ARMBaseTargetMachine::addInstSelector(PassManagerBase &PM,
  89                                            CodeGenOpt::Level OptLevel) {
  90   PM.add(createARMISelDag(*this));
  91   return false;
  92 }
  93
  94 bool ARMBaseTargetMachine::addPreRegAlloc(PassManagerBase &PM,
  95                                           CodeGenOpt::Level OptLevel) {
  96   // FIXME: temporarily disabling load / store optimization pass for Thumb mode.
  97   if (OptLevel != CodeGenOpt::None && !DisableLdStOpti && !Subtarget.isThumb())
  98     PM.add(createARMLoadStoreOptimizationPass(true));
  99   return true;
 100 }
 101
 102 bool ARMBaseTargetMachine::addPreEmitPass(PassManagerBase &PM,
 103                                           CodeGenOpt::Level OptLevel) {
 104   // FIXME: temporarily disabling load / store optimization pass for Thumb1 mode.
 105   if (OptLevel != CodeGenOpt::None && !DisableLdStOpti &&
 106       !Subtarget.isThumb1Only())
 107     PM.add(createARMLoadStoreOptimizationPass());
 108
 109   if (OptLevel != CodeGenOpt::None &&
 110       !DisableIfConversion && !Subtarget.isThumb())
 111     PM.add(createIfConverterPass());
 112
 113   if (Subtarget.isThumb2())
 114     PM.add(createThumb2ITBlockPass());
 115
 116   PM.add(createARMConstantIslandPass());
 117   return true;
 118 }
 119
 120 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
 121                                           CodeGenOpt::Level OptLevel,
 122                                           MachineCodeEmitter &MCE) {
 123   // FIXME: Move this to TargetJITInfo!
 124   if (DefRelocModel == Reloc::Default)
 125     setRelocationModel(Reloc::Static);
 126
 127   // Machine code emitter pass for ARM.
 128   PM.add(createARMCodeEmitterPass(*this, MCE));
 129   return false;
 130 }
 131
 132 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
 133                                           CodeGenOpt::Level OptLevel,
 134                                           JITCodeEmitter &JCE) {
 135   // FIXME: Move this to TargetJITInfo!
 136   if (DefRelocModel == Reloc::Default)
 137     setRelocationModel(Reloc::Static);
 138
 139   // Machine code emitter pass for ARM.
 140   PM.add(createARMJITCodeEmitterPass(*this, JCE));
 141   return false;
 142 }
 143
 144 bool ARMBaseTargetMachine::addCodeEmitter(PassManagerBase &PM,
 145                                           CodeGenOpt::Level OptLevel,
 146                                           ObjectCodeEmitter &OCE) {
 147   // FIXME: Move this to TargetJITInfo!
 148   if (DefRelocModel == Reloc::Default)
 149     setRelocationModel(Reloc::Static);
 150
 151   // Machine code emitter pass for ARM.
 152   PM.add(createARMObjectCodeEmitterPass(*this, OCE));
 153   return false;
 154 }
 155
 156 bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 157                                                 CodeGenOpt::Level OptLevel,
 158                                                 MachineCodeEmitter &MCE) {
 159   // Machine code emitter pass for ARM.
 160   PM.add(createARMCodeEmitterPass(*this, MCE));
 161   return false;
 162 }
 163
 164 bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 165                                                 CodeGenOpt::Level OptLevel,
 166                                                 JITCodeEmitter &JCE) {
 167   // Machine code emitter pass for ARM.
 168   PM.add(createARMJITCodeEmitterPass(*this, JCE));
 169   return false;
 170 }
 171
 172 bool ARMBaseTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 173                                             CodeGenOpt::Level OptLevel,
 174                                             ObjectCodeEmitter &OCE) {
 175   // Machine code emitter pass for ARM.
 176   PM.add(createARMObjectCodeEmitterPass(*this, OCE));
 177   return false;
 178 }
 179