lib/Target/Alpha/AlphaTargetMachine.cpp

   1 //===-- AlphaTargetMachine.cpp - Define TargetMachine for Alpha -----------===//
   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 "Alpha.h"
  14 #include "AlphaJITInfo.h"
  15 #include "AlphaTargetAsmInfo.h"
  16 #include "AlphaTargetMachine.h"
  17 #include "llvm/Module.h"
  18 #include "llvm/PassManager.h"
  19 #include "llvm/Target/TargetMachineRegistry.h"
  20 #include "llvm/Support/raw_ostream.h"
  21
  22 using namespace llvm;
  23
  24 /// AlphaTargetMachineModule - Note that this is used on hosts that cannot link
  25 /// in a library unless there are references into the library.  In particular,
  26 /// it seems that it is not possible to get things to work on Win32 without
  27 /// this.  Though it is unused, do not remove it.
  28 extern "C" int AlphaTargetMachineModule;
  29 int AlphaTargetMachineModule = 0;
  30
  31 // Register the targets
  32 static RegisterTarget<AlphaTargetMachine> X("alpha", "Alpha [experimental]");
  33
  34 // Force static initialization when called from llvm/InitializeAllTargets.h
  35 namespace llvm {
  36   void InitializeAlphaTarget() { }
  37 }
  38
  39 const TargetAsmInfo *AlphaTargetMachine::createTargetAsmInfo() const {
  40   return new AlphaTargetAsmInfo(*this);
  41 }
  42
  43 unsigned AlphaTargetMachine::getModuleMatchQuality(const Module &M) {
  44   // We strongly match "alpha*".
  45   std::string TT = M.getTargetTriple();
  46   if (TT.size() >= 5 && TT[0] == 'a' && TT[1] == 'l' && TT[2] == 'p' &&
  47       TT[3] == 'h' && TT[4] == 'a')
  48     return 20;
  49   // If the target triple is something non-alpha, we don't match.
  50   if (!TT.empty()) return 0;
  51
  52   if (M.getEndianness()  == Module::LittleEndian &&
  53       M.getPointerSize() == Module::Pointer64)
  54     return 10;                                   // Weak match
  55   else if (M.getEndianness() != Module::AnyEndianness ||
  56            M.getPointerSize() != Module::AnyPointerSize)
  57     return 0;                                    // Match for some other target
  58
  59   return getJITMatchQuality()/2;
  60 }
  61
  62 unsigned AlphaTargetMachine::getJITMatchQuality() {
  63 #ifdef __alpha
  64   return 10;
  65 #else
  66   return 0;
  67 #endif
  68 }
  69
  70 AlphaTargetMachine::AlphaTargetMachine(const Module &M, const std::string &FS)
  71   : DataLayout("e-f128:128:128"),
  72     FrameInfo(TargetFrameInfo::StackGrowsDown, 16, 0),
  73     JITInfo(*this),
  74     Subtarget(M, FS),
  75     TLInfo(*this) {
  76   setRelocationModel(Reloc::PIC_);
  77 }
  78
  79
  80 //===----------------------------------------------------------------------===//
  81 // Pass Pipeline Configuration
  82 //===----------------------------------------------------------------------===//
  83
  84 bool AlphaTargetMachine::addInstSelector(PassManagerBase &PM,
  85                                          CodeGenOpt::Level OptLevel) {
  86   PM.add(createAlphaISelDag(*this));
  87   return false;
  88 }
  89 bool AlphaTargetMachine::addPreEmitPass(PassManagerBase &PM,
  90                                         CodeGenOpt::Level OptLevel) {
  91   // Must run branch selection immediately preceding the asm printer
  92   PM.add(createAlphaBranchSelectionPass());
  93   return false;
  94 }
  95 bool AlphaTargetMachine::addAssemblyEmitter(PassManagerBase &PM,
  96                                             CodeGenOpt::Level OptLevel,
  97                                             bool Verbose,
  98                                             raw_ostream &Out) {
  99   PM.add(createAlphaLLRPPass(*this));
 100   PM.add(createAlphaCodePrinterPass(Out, *this, OptLevel, Verbose));
 101   return false;
 102 }
 103 bool AlphaTargetMachine::addCodeEmitter(PassManagerBase &PM,
 104                                         CodeGenOpt::Level OptLevel,
 105                                         bool DumpAsm, MachineCodeEmitter &MCE) {
 106   PM.add(createAlphaCodeEmitterPass(*this, MCE));
 107   if (DumpAsm)
 108     PM.add(createAlphaCodePrinterPass(errs(), *this, OptLevel, true));
 109   return false;
 110 }
 111 bool AlphaTargetMachine::addCodeEmitter(PassManagerBase &PM,
 112                                         CodeGenOpt::Level OptLevel,
 113                                         bool DumpAsm, JITCodeEmitter &JCE) {
 114   PM.add(createAlphaJITCodeEmitterPass(*this, JCE));
 115   if (DumpAsm)
 116     PM.add(createAlphaCodePrinterPass(errs(), *this, OptLevel, true));
 117   return false;
 118 }
 119 bool AlphaTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 120                                               CodeGenOpt::Level OptLevel,
 121                                               bool DumpAsm,
 122                                               MachineCodeEmitter &MCE) {
 123   return addCodeEmitter(PM, OptLevel, DumpAsm, MCE);
 124 }
 125 bool AlphaTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 126                                               CodeGenOpt::Level OptLevel,
 127                                               bool DumpAsm,
 128                                               JITCodeEmitter &JCE) {
 129   return addCodeEmitter(PM, OptLevel, DumpAsm, JCE);
 130 }
 131