LLVMTargetMachine.cpp [plain text]
#include "llvm/Target/TargetMachine.h"
#include "llvm/Analysis/Passes.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/BasicTTIImpl.h"
#include "llvm/CodeGen/MachineFunctionAnalysis.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/IR/IRPrintingPasses.h"
#include "llvm/IR/Verifier.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/PassManager.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetSubtargetInfo.h"
#include "llvm/Transforms/Scalar.h"
using namespace llvm;
static cl::opt<cl::boolOrDefault>
EnableFastISelOption("fast-isel", cl::Hidden,
cl::desc("Enable the \"fast\" instruction selector"));
void LLVMTargetMachine::initAsmInfo() {
MRI = TheTarget.createMCRegInfo(getTargetTriple());
MII = TheTarget.createMCInstrInfo();
STI = TheTarget.createMCSubtargetInfo(getTargetTriple(), getTargetCPU(),
getTargetFeatureString());
MCAsmInfo *TmpAsmInfo = TheTarget.createMCAsmInfo(*MRI, getTargetTriple());
assert(TmpAsmInfo && "MCAsmInfo not initialized. "
"Make sure you include the correct TargetSelect.h"
"and that InitializeAllTargetMCs() is being invoked!");
if (Options.DisableIntegratedAS)
TmpAsmInfo->setUseIntegratedAssembler(false);
if (Options.CompressDebugSections)
TmpAsmInfo->setCompressDebugSections(true);
AsmInfo = TmpAsmInfo;
}
LLVMTargetMachine::LLVMTargetMachine(const Target &T,
StringRef DataLayoutString,
StringRef Triple, StringRef CPU,
StringRef FS, TargetOptions Options,
Reloc::Model RM, CodeModel::Model CM,
CodeGenOpt::Level OL)
: TargetMachine(T, DataLayoutString, Triple, CPU, FS, Options) {
CodeGenInfo = T.createMCCodeGenInfo(Triple, RM, CM, OL);
}
TargetIRAnalysis LLVMTargetMachine::getTargetIRAnalysis() {
return TargetIRAnalysis([this](Function &F) {
return TargetTransformInfo(BasicTTIImpl(this, F));
});
}
static MCContext *addPassesToGenerateCode(LLVMTargetMachine *TM,
PassManagerBase &PM,
bool DisableVerify,
AnalysisID StartAfter,
AnalysisID StopAfter) {
PM.add(createTargetTransformInfoWrapperPass(TM->getTargetIRAnalysis()));
TargetPassConfig *PassConfig = TM->createPassConfig(PM);
PassConfig->setStartStopPasses(StartAfter, StopAfter);
PassConfig->setDisableVerify(DisableVerify);
PM.add(PassConfig);
PassConfig->addIRPasses();
PassConfig->addCodeGenPrepare();
PassConfig->addPassesToHandleExceptions();
PassConfig->addISelPrepare();
MachineModuleInfo *MMI = new MachineModuleInfo(
*TM->getMCAsmInfo(), *TM->getMCRegisterInfo(), TM->getObjFileLowering());
PM.add(MMI);
PM.add(new MachineFunctionAnalysis(*TM));
if (EnableFastISelOption == cl::BOU_TRUE ||
(TM->getOptLevel() == CodeGenOpt::None &&
EnableFastISelOption != cl::BOU_FALSE))
TM->setFastISel(true);
if (PassConfig->addInstSelector())
return nullptr;
PassConfig->addMachinePasses();
PassConfig->setInitialized();
return &MMI->getContext();
}
bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
formatted_raw_ostream &Out,
CodeGenFileType FileType,
bool DisableVerify,
AnalysisID StartAfter,
AnalysisID StopAfter) {
MCContext *Context = addPassesToGenerateCode(this, PM, DisableVerify,
StartAfter, StopAfter);
if (!Context)
return true;
if (StopAfter) {
PM.add(createPrintModulePass(Out));
return false;
}
if (Options.MCOptions.MCSaveTempLabels)
Context->setAllowTemporaryLabels(false);
const MCSubtargetInfo &STI = *getMCSubtargetInfo();
const MCAsmInfo &MAI = *getMCAsmInfo();
const MCRegisterInfo &MRI = *getMCRegisterInfo();
const MCInstrInfo &MII = *getMCInstrInfo();
std::unique_ptr<MCStreamer> AsmStreamer;
switch (FileType) {
case CGFT_AssemblyFile: {
MCInstPrinter *InstPrinter = getTarget().createMCInstPrinter(
Triple(getTargetTriple()), MAI.getAssemblerDialect(), MAI, MII, MRI);
MCCodeEmitter *MCE = nullptr;
if (Options.MCOptions.ShowMCEncoding)
MCE = getTarget().createMCCodeEmitter(MII, MRI, *Context);
MCAsmBackend *MAB = getTarget().createMCAsmBackend(MRI, getTargetTriple(),
TargetCPU);
MCStreamer *S = getTarget().createAsmStreamer(
*Context, Out, Options.MCOptions.AsmVerbose,
Options.MCOptions.MCUseDwarfDirectory, InstPrinter, MCE, MAB,
Options.MCOptions.ShowMCInst);
AsmStreamer.reset(S);
break;
}
case CGFT_ObjectFile: {
MCCodeEmitter *MCE = getTarget().createMCCodeEmitter(MII, MRI, *Context);
MCAsmBackend *MAB = getTarget().createMCAsmBackend(MRI, getTargetTriple(),
TargetCPU);
if (!MCE || !MAB)
return true;
AsmStreamer.reset(
getTarget()
.createMCObjectStreamer(getTargetTriple(), *Context, *MAB, Out, MCE,
STI, Options.MCOptions.MCRelaxAll));
break;
}
case CGFT_Null:
AsmStreamer.reset(getTarget().createNullStreamer(*Context));
break;
}
FunctionPass *Printer =
getTarget().createAsmPrinter(*this, std::move(AsmStreamer));
if (!Printer)
return true;
PM.add(Printer);
return false;
}
bool LLVMTargetMachine::addPassesToEmitMC(PassManagerBase &PM,
MCContext *&Ctx,
raw_ostream &Out,
bool DisableVerify) {
Ctx = addPassesToGenerateCode(this, PM, DisableVerify, nullptr, nullptr);
if (!Ctx)
return true;
if (Options.MCOptions.MCSaveTempLabels)
Ctx->setAllowTemporaryLabels(false);
const MCRegisterInfo &MRI = *getMCRegisterInfo();
MCCodeEmitter *MCE =
getTarget().createMCCodeEmitter(*getMCInstrInfo(), MRI, *Ctx);
MCAsmBackend *MAB = getTarget().createMCAsmBackend(MRI, getTargetTriple(),
TargetCPU);
if (!MCE || !MAB)
return true;
const MCSubtargetInfo &STI = *getMCSubtargetInfo();
std::unique_ptr<MCStreamer> AsmStreamer(getTarget().createMCObjectStreamer(
getTargetTriple(), *Ctx, *MAB, Out, MCE, STI,
Options.MCOptions.MCRelaxAll));
FunctionPass *Printer =
getTarget().createAsmPrinter(*this, std::move(AsmStreamer));
if (!Printer)
return true;
PM.add(Printer);
return false; }