text: //===-- IA64TargetMachine.cpp - Define TargetMachine for IA64 -------------===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is distributed under the University of Illinois Open Source
  // License. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  //
  // This file implements the IA64 specific subclass of TargetMachine.
  //
  //===----------------------------------------------------------------------===//
  
  #include "IA64TargetAsmInfo.h"
  #include "IA64TargetMachine.h"
  #include "IA64.h"
  #include "llvm/Module.h"
  #include "llvm/PassManager.h"
  #include "llvm/Target/TargetMachineRegistry.h"
  using namespace llvm;
  
  /// IA64TargetMachineModule - Note that this is used on hosts that cannot link
  /// in a library unless there are references into the library.  In particular,
  /// it seems that it is not possible to get things to work on Win32 without
  /// this.  Though it is unused, do not remove it.
  extern "C" int IA64TargetMachineModule;
  int IA64TargetMachineModule = 0;
  
  namespace {
    RegisterTarget<IA64TargetMachine> X("ia64", "  IA-64 (Itanium)");
  }
  
  const TargetAsmInfo *IA64TargetMachine::createTargetAsmInfo() const {
    return new IA64TargetAsmInfo(*this);
  }
  
  unsigned IA64TargetMachine::getModuleMatchQuality(const Module &M) {
    // we match [iI][aA]*64
    bool seenIA64=false;
    std::string TT = M.getTargetTriple();
  
    if (TT.size() >= 4) {
      if( (TT[0]=='i' || TT[0]=='I') &&
          (TT[1]=='a' || TT[1]=='A') ) {
        for(unsigned int i=2; i<(TT.size()-1); i++)
          if(TT[i]=='6' && TT[i+1]=='4')
            seenIA64=true;
      }
  
      if (seenIA64)
        return 20; // strong match
    }
    // If the target triple is something non-ia64, we don't match.
    if (!TT.empty()) return 0;
  
  #if defined(__ia64__) || defined(__IA64__)
    return 5;
  #else
    return 0;
  #endif
  }
  
  /// IA64TargetMachine ctor - Create an LP64 architecture model
  ///
  IA64TargetMachine::IA64TargetMachine(const Module &M, const std::string &FS)
    : DataLayout("e-f80:128:128"),
      FrameInfo(TargetFrameInfo::StackGrowsDown, 16, 0),
      TLInfo(*this) { // FIXME? check this stuff
  }
  
  
  //===----------------------------------------------------------------------===//
  // Pass Pipeline Configuration
  //===----------------------------------------------------------------------===//
  
  bool IA64TargetMachine::addInstSelector(PassManagerBase &PM, bool Fast) {
    PM.add(createIA64DAGToDAGInstructionSelector(*this));
    return false;
  }
  
  bool IA64TargetMachine::addPreEmitPass(PassManagerBase &PM, bool Fast) {
    // Make sure everything is bundled happily
    PM.add(createIA64BundlingPass(*this));
    return true;
  }
  bool IA64TargetMachine::addAssemblyEmitter(PassManagerBase &PM, bool Fast, 
                                             std::ostream &Out) {
    PM.add(createIA64CodePrinterPass(Out, *this));
    return false;
  }
  
  