lib/Target/ARM/ARMTargetMachine.cpp

   1 //===-- ARMTargetMachine.cpp - Define TargetMachine for ARM ---------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by the "Instituto Nokia de Tecnologia" and
   6 // is distributed under the University of Illinois Open Source
   7 // License. See LICENSE.TXT for details.
   8 //
   9 //===----------------------------------------------------------------------===//
  10 //
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "ARMTargetMachine.h"
  15 #include "ARMTargetAsmInfo.h"
  16 #include "ARMFrameInfo.h"
  17 #include "ARM.h"
  18 #include "llvm/Module.h"
  19 #include "llvm/PassManager.h"
  20 #include "llvm/CodeGen/Passes.h"
  21 #include "llvm/Support/CommandLine.h"
  22 #include "llvm/Target/TargetMachineRegistry.h"
  23 #include "llvm/Target/TargetOptions.h"
  24 using namespace llvm;
  25
  26 static cl::opt<bool> DisableLdStOpti("disable-arm-loadstore-opti", cl::Hidden,
  27                               cl::desc("Disable load store optimization pass"));
  28 static cl::opt<bool> DisableIfConversion("disable-arm-if-conversion",cl::Hidden,
  29                               cl::desc("Disable if-conversion pass"));
  30
  31 namespace {
  32   // Register the target.
  33   RegisterTarget<ARMTargetMachine>   X("arm",   "  ARM");
  34   RegisterTarget<ThumbTargetMachine> Y("thumb", "  Thumb");
  35 }
  36
  37 /// ThumbTargetMachine - Create an Thumb architecture model.
  38 ///
  39 unsigned ThumbTargetMachine::getJITMatchQuality() {
  40 #if defined(__thumb__)
  41   return 10;
  42 #endif
  43   return 0;
  44 }
  45
  46 unsigned ThumbTargetMachine::getModuleMatchQuality(const Module &M) {
  47   std::string TT = M.getTargetTriple();
  48   if (TT.size() >= 6 && std::string(TT.begin(), TT.begin()+6) == "thumb-")
  49     return 20;
  50
  51   // If the target triple is something non-thumb, we don't match.
  52   if (!TT.empty()) return 0;
  53
  54   if (M.getEndianness()  == Module::LittleEndian &&
  55       M.getPointerSize() == Module::Pointer32)
  56     return 10;                                   // Weak match
  57   else if (M.getEndianness() != Module::AnyEndianness ||
  58            M.getPointerSize() != Module::AnyPointerSize)
  59     return 0;                                    // Match for some other target
  60
  61   return getJITMatchQuality()/2;
  62 }
  63
  64 ThumbTargetMachine::ThumbTargetMachine(const Module &M, const std::string &FS)
  65   : ARMTargetMachine(M, FS, true) {
  66 }
  67
  68 /// TargetMachine ctor - Create an ARM architecture model.
  69 ///
  70 ARMTargetMachine::ARMTargetMachine(const Module &M, const std::string &FS,
  71                                    bool isThumb)
  72   : Subtarget(M, FS, isThumb),
  73     DataLayout(Subtarget.isAPCS_ABI() ?
  74                // APCS ABI
  75           (isThumb ?
  76            std::string("e-p:32:32-f64:32:32-i64:32:32-"
  77                        "i16:16:32-i8:8:32-i1:8:32-a:0:32") :
  78            std::string("e-p:32:32-f64:32:32-i64:32:32")) :
  79                // AAPCS ABI
  80           (isThumb ?
  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            std::string("e-p:32:32-f64:64:64-i64:64:64"))),
  84     InstrInfo(Subtarget),
  85     FrameInfo(Subtarget),
  86     JITInfo(*this),
  87     TLInfo(*this) {}
  88
  89 unsigned ARMTargetMachine::getJITMatchQuality() {
  90 #if defined(__arm__)
  91   return 10;
  92 #endif
  93   return 0;
  94 }
  95
  96 unsigned ARMTargetMachine::getModuleMatchQuality(const Module &M) {
  97   std::string TT = M.getTargetTriple();
  98   if (TT.size() >= 4 && std::string(TT.begin(), TT.begin()+4) == "arm-")
  99     return 20;
 100   // If the target triple is something non-arm, we don't match.
 101   if (!TT.empty()) return 0;
 102
 103   if (M.getEndianness()  == Module::LittleEndian &&
 104       M.getPointerSize() == Module::Pointer32)
 105     return 10;                                   // Weak match
 106   else if (M.getEndianness() != Module::AnyEndianness ||
 107            M.getPointerSize() != Module::AnyPointerSize)
 108     return 0;                                    // Match for some other target
 109
 110   return getJITMatchQuality()/2;
 111 }
 112
 113
 114 const TargetAsmInfo *ARMTargetMachine::createTargetAsmInfo() const {
 115   return new ARMTargetAsmInfo(*this);
 116 }
 117
 118
 119 // Pass Pipeline Configuration
 120 bool ARMTargetMachine::addInstSelector(FunctionPassManager &PM, bool Fast) {
 121   PM.add(createARMISelDag(*this));
 122   return false;
 123 }
 124
 125 bool ARMTargetMachine::addPreEmitPass(FunctionPassManager &PM, bool Fast) {
 126   // FIXME: temporarily disabling load / store optimization pass for Thumb mode.
 127   if (!Fast && !DisableLdStOpti && !Subtarget.isThumb())
 128     PM.add(createARMLoadStoreOptimizationPass());
 129
 130   if (!Fast && !DisableIfConversion && !Subtarget.isThumb())
 131     PM.add(createIfConverterPass());
 132
 133   PM.add(createARMConstantIslandPass());
 134   return true;
 135 }
 136
 137 bool ARMTargetMachine::addAssemblyEmitter(FunctionPassManager &PM, bool Fast,
 138                                           std::ostream &Out) {
 139   // Output assembly language.
 140   PM.add(createARMCodePrinterPass(Out, *this));
 141   return false;
 142 }
 143
 144
 145 bool ARMTargetMachine::addCodeEmitter(FunctionPassManager &PM, bool Fast,
 146                                       bool DumpAsm, MachineCodeEmitter &MCE) {
 147   // FIXME: Move this to TargetJITInfo!
 148   setRelocationModel(Reloc::Static);
 149
 150   // Machine code emitter pass for ARM.
 151   PM.add(createARMCodeEmitterPass(*this, MCE));
 152   if (DumpAsm)
 153     PM.add(createARMCodePrinterPass(*cerr.stream(), *this));
 154   return false;
 155 }
 156
 157 bool ARMTargetMachine::addSimpleCodeEmitter(FunctionPassManager &PM, bool Fast,
 158                                         bool DumpAsm, MachineCodeEmitter &MCE) {
 159   // Machine code emitter pass for ARM.
 160   PM.add(createARMCodeEmitterPass(*this, MCE));
 161   if (DumpAsm)
 162     PM.add(createARMCodePrinterPass(*cerr.stream(), *this));
 163   return false;
 164 }