lib/Target/Alpha/AlphaTargetMachine.cpp

   1 //===-- AlphaTargetMachine.cpp - Define TargetMachine for Alpha -----------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file was developed by the LLVM research group and is distributed under
   6 // the University of Illinois Open Source 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
  21 using namespace llvm;
  22
  23 namespace {
  24   // Register the targets
  25   RegisterTarget<AlphaTargetMachine> X("alpha", "  Alpha (incomplete)");
  26 }
  27
  28 const TargetAsmInfo *AlphaTargetMachine::createTargetAsmInfo() const {
  29   return new AlphaTargetAsmInfo(*this);
  30 }
  31
  32 unsigned AlphaTargetMachine::getModuleMatchQuality(const Module &M) {
  33   // We strongly match "alpha*".
  34   std::string TT = M.getTargetTriple();
  35   if (TT.size() >= 5 && TT[0] == 'a' && TT[1] == 'l' && TT[2] == 'p' &&
  36       TT[3] == 'h' && TT[4] == 'a')
  37     return 20;
  38   // If the target triple is something non-alpha, we don't match.
  39   if (!TT.empty()) return 0;
  40
  41   if (M.getEndianness()  == Module::LittleEndian &&
  42       M.getPointerSize() == Module::Pointer64)
  43     return 10;                                   // Weak match
  44   else if (M.getEndianness() != Module::AnyEndianness ||
  45            M.getPointerSize() != Module::AnyPointerSize)
  46     return 0;                                    // Match for some other target
  47
  48   return getJITMatchQuality()/2;
  49 }
  50
  51 unsigned AlphaTargetMachine::getJITMatchQuality() {
  52 #ifdef __alpha
  53   return 10;
  54 #else
  55   return 0;
  56 #endif
  57 }
  58
  59 AlphaTargetMachine::AlphaTargetMachine(const Module &M, const std::string &FS)
  60   : DataLayout("e-f128:128:128"),
  61     FrameInfo(TargetFrameInfo::StackGrowsDown, 16, 0),
  62     JITInfo(*this),
  63     Subtarget(M, FS),
  64     TLInfo(*this) {
  65   setRelocationModel(Reloc::PIC_);
  66 }
  67
  68
  69 //===----------------------------------------------------------------------===//
  70 // Pass Pipeline Configuration
  71 //===----------------------------------------------------------------------===//
  72
  73 bool AlphaTargetMachine::addInstSelector(FunctionPassManager &PM, bool Fast) {
  74   PM.add(createAlphaISelDag(*this));
  75   return false;
  76 }
  77 bool AlphaTargetMachine::addPreEmitPass(FunctionPassManager &PM, bool Fast) {
  78   // Must run branch selection immediately preceding the asm printer
  79   PM.add(createAlphaBranchSelectionPass());
  80   return false;
  81 }
  82 bool AlphaTargetMachine::addAssemblyEmitter(FunctionPassManager &PM, bool Fast,
  83                                             std::ostream &Out) {
  84   PM.add(createAlphaLLRPPass(*this));
  85   PM.add(createAlphaCodePrinterPass(Out, *this));
  86   return false;
  87 }
  88 bool AlphaTargetMachine::addCodeEmitter(FunctionPassManager &PM, bool Fast,
  89                                         bool DumpAsm, MachineCodeEmitter &MCE) {
  90   PM.add(createAlphaCodeEmitterPass(*this, MCE));
  91   if (DumpAsm)
  92     PM.add(createAlphaCodePrinterPass(*cerr.stream(), *this));
  93   return false;
  94 }
  95 bool AlphaTargetMachine::addSimpleCodeEmitter(FunctionPassManager &PM,
  96                                               bool Fast, bool DumpAsm,
  97                                               MachineCodeEmitter &MCE) {
  98   return addCodeEmitter(PM, Fast, DumpAsm, MCE);
  99 }