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SampleTargetMachine.cpp
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SampleTargetMachine.cpp
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//===-- SampleTargetMachine.cpp - Define TargetMachine for Sample -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Implements the info about Sample target spec.
//
//===----------------------------------------------------------------------===//
#include "SampleTargetMachine.h"
#include "SampleTargetObjectFile.h"
#include "Sample.h"
#include "llvm/IR/PassManager.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/TargetPassConfig.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
extern "C" void LLVMInitializeSampleTarget() {
// Register the target.
RegisterTargetMachine<SampleTargetMachine> X(getTheSampleTarget());
}
static std::string computeDataLayout() {
return "e-p:32:32:32-i8:8:32-i16:16:32-i64:64:64-n32";
}
static Reloc::Model getEffectiveRelocModel(Optional<Reloc::Model> RM) {
if (!RM.hasValue())
return Reloc::Static;
return *RM;
}
SampleTargetMachine::
SampleTargetMachine(const Target &T, const Triple &TT,
StringRef CPU, StringRef FS, const TargetOptions &Options,
Optional<Reloc::Model> RM, Optional<CodeModel::Model> CM,
CodeGenOpt::Level OL, bool JIT)
: LLVMTargetMachine(T, computeDataLayout(), TT, CPU, FS, Options,
getEffectiveRelocModel(RM),
getEffectiveCodeModel(CM, CodeModel::Small), OL),
TLOF(std::make_unique<SampleTargetObjectFile>()),
Subtarget(TT, CPU, FS, *this) {
initAsmInfo();
}
namespace {
/// Sample Code Generator Pass Configuration Options.
class SamplePassConfig : public TargetPassConfig {
public:
SamplePassConfig(SampleTargetMachine &TM, PassManagerBase &PM)
: TargetPassConfig(TM, PM) {}
SampleTargetMachine &getSampleTargetMachine() const {
return getTM<SampleTargetMachine>();
}
bool addInstSelector() override;
};
} // namespace
TargetPassConfig *SampleTargetMachine::createPassConfig(PassManagerBase &PM) {
return new SamplePassConfig(*this, PM);
}
bool SamplePassConfig::addInstSelector() {
// Install an instruction selector.
addPass(createSampleISelDag(getSampleTargetMachine()));
return false;
}