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 const TargetAsmInfo *AlphaTargetMachine::createTargetAsmInfo() const {
  35   return new AlphaTargetAsmInfo(*this);
  36 }
  37
  38 unsigned AlphaTargetMachine::getModuleMatchQuality(const Module &M) {
  39   // We strongly match "alpha*".
  40   std::string TT = M.getTargetTriple();
  41   if (TT.size() >= 5 && TT[0] == 'a' && TT[1] == 'l' && TT[2] == 'p' &&
  42       TT[3] == 'h' && TT[4] == 'a')
  43     return 20;
  44   // If the target triple is something non-alpha, we don't match.
  45   if (!TT.empty()) return 0;
  46
  47   if (M.getEndianness()  == Module::LittleEndian &&
  48       M.getPointerSize() == Module::Pointer64)
  49     return 10;                                   // Weak match
  50   else if (M.getEndianness() != Module::AnyEndianness ||
  51            M.getPointerSize() != Module::AnyPointerSize)
  52     return 0;                                    // Match for some other target
  53
  54   return getJITMatchQuality()/2;
  55 }
  56
  57 unsigned AlphaTargetMachine::getJITMatchQuality() {
  58 #ifdef __alpha
  59   return 10;
  60 #else
  61   return 0;
  62 #endif
  63 }
  64
  65 AlphaTargetMachine::AlphaTargetMachine(const Module &M, const std::string &FS)
  66   : DataLayout("e-f128:128:128"),
  67     FrameInfo(TargetFrameInfo::StackGrowsDown, 16, 0),
  68     JITInfo(*this),
  69     Subtarget(M, FS),
  70     TLInfo(*this) {
  71   setRelocationModel(Reloc::PIC_);
  72 }
  73
  74
  75 //===----------------------------------------------------------------------===//
  76 // Pass Pipeline Configuration
  77 //===----------------------------------------------------------------------===//
  78
  79 bool AlphaTargetMachine::addInstSelector(PassManagerBase &PM,
  80                                          CodeGenOpt::Level OptLevel) {
  81   PM.add(createAlphaISelDag(*this));
  82   return false;
  83 }
  84 bool AlphaTargetMachine::addPreEmitPass(PassManagerBase &PM,
  85                                         CodeGenOpt::Level OptLevel) {
  86   // Must run branch selection immediately preceding the asm printer
  87   PM.add(createAlphaBranchSelectionPass());
  88   return false;
  89 }
  90 bool AlphaTargetMachine::addAssemblyEmitter(PassManagerBase &PM,
  91                                             CodeGenOpt::Level OptLevel,
  92                                             bool Verbose,
  93                                             raw_ostream &Out) {
  94   PM.add(createAlphaLLRPPass(*this));
  95   PM.add(createAlphaCodePrinterPass(Out, *this, OptLevel, Verbose));
  96   return false;
  97 }
  98 bool AlphaTargetMachine::addCodeEmitter(PassManagerBase &PM,
  99                                         CodeGenOpt::Level OptLevel,
 100                                         bool DumpAsm, MachineCodeEmitter &MCE) {
 101   PM.add(createAlphaCodeEmitterPass(*this, MCE));
 102   if (DumpAsm)
 103     PM.add(createAlphaCodePrinterPass(errs(), *this, OptLevel, true));
 104   return false;
 105 }
 106 bool AlphaTargetMachine::addSimpleCodeEmitter(PassManagerBase &PM,
 107                                               CodeGenOpt::Level OptLevel,
 108                                               bool DumpAsm,
 109                                               MachineCodeEmitter &MCE) {
 110   return addCodeEmitter(PM, OptLevel, DumpAsm, MCE);
 111 }