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-rw-r--r--gnu/llvm/lib/CodeGen/LLVMTargetMachine.cpp262
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diff --git a/gnu/llvm/lib/CodeGen/LLVMTargetMachine.cpp b/gnu/llvm/lib/CodeGen/LLVMTargetMachine.cpp
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--- a/gnu/llvm/lib/CodeGen/LLVMTargetMachine.cpp
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-//===-- LLVMTargetMachine.cpp - Implement the LLVMTargetMachine class -----===//
-//
-// 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 LLVMTargetMachine class.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/Analysis/Passes.h"
-#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/BasicTTIImpl.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/CodeGen/Passes.h"
-#include "llvm/CodeGen/TargetPassConfig.h"
-#include "llvm/IR/LegacyPassManager.h"
-#include "llvm/MC/MCAsmBackend.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCCodeEmitter.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCInstrInfo.h"
-#include "llvm/MC/MCObjectWriter.h"
-#include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSubtargetInfo.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/FormattedStream.h"
-#include "llvm/Support/TargetRegistry.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
-using namespace llvm;
-
-static cl::opt<bool> EnableTrapUnreachable("trap-unreachable",
- cl::Hidden, cl::ZeroOrMore, cl::init(false),
- cl::desc("Enable generating trap for unreachable"));
-
-void LLVMTargetMachine::initAsmInfo() {
- MRI.reset(TheTarget.createMCRegInfo(getTargetTriple().str()));
- MII.reset(TheTarget.createMCInstrInfo());
- // FIXME: Having an MCSubtargetInfo on the target machine is a hack due
- // to some backends having subtarget feature dependent module level
- // code generation. This is similar to the hack in the AsmPrinter for
- // module level assembly etc.
- STI.reset(TheTarget.createMCSubtargetInfo(
- getTargetTriple().str(), getTargetCPU(), getTargetFeatureString()));
-
- MCAsmInfo *TmpAsmInfo =
- TheTarget.createMCAsmInfo(*MRI, getTargetTriple().str());
- // TargetSelect.h moved to a different directory between LLVM 2.9 and 3.0,
- // and if the old one gets included then MCAsmInfo will be NULL and
- // we'll crash later.
- // Provide the user with a useful error message about what's wrong.
- 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);
-
- TmpAsmInfo->setPreserveAsmComments(Options.MCOptions.PreserveAsmComments);
-
- TmpAsmInfo->setCompressDebugSections(Options.CompressDebugSections);
-
- TmpAsmInfo->setRelaxELFRelocations(Options.RelaxELFRelocations);
-
- if (Options.ExceptionModel != ExceptionHandling::None)
- TmpAsmInfo->setExceptionsType(Options.ExceptionModel);
-
- AsmInfo.reset(TmpAsmInfo);
-}
-
-LLVMTargetMachine::LLVMTargetMachine(const Target &T,
- StringRef DataLayoutString,
- const Triple &TT, StringRef CPU,
- StringRef FS, const TargetOptions &Options,
- Reloc::Model RM, CodeModel::Model CM,
- CodeGenOpt::Level OL)
- : TargetMachine(T, DataLayoutString, TT, CPU, FS, Options) {
- this->RM = RM;
- this->CMModel = CM;
- this->OptLevel = OL;
-
- if (EnableTrapUnreachable)
- this->Options.TrapUnreachable = true;
-}
-
-TargetTransformInfo
-LLVMTargetMachine::getTargetTransformInfo(const Function &F) {
- return TargetTransformInfo(BasicTTIImpl(this, F));
-}
-
-/// addPassesToX helper drives creation and initialization of TargetPassConfig.
-static TargetPassConfig *
-addPassesToGenerateCode(LLVMTargetMachine &TM, PassManagerBase &PM,
- bool DisableVerify, MachineModuleInfo &MMI) {
- // Targets may override createPassConfig to provide a target-specific
- // subclass.
- TargetPassConfig *PassConfig = TM.createPassConfig(PM);
- // Set PassConfig options provided by TargetMachine.
- PassConfig->setDisableVerify(DisableVerify);
- PM.add(PassConfig);
- PM.add(&MMI);
-
- if (PassConfig->addISelPasses())
- return nullptr;
- PassConfig->addMachinePasses();
- PassConfig->setInitialized();
- return PassConfig;
-}
-
-bool LLVMTargetMachine::addAsmPrinter(PassManagerBase &PM,
- raw_pwrite_stream &Out,
- raw_pwrite_stream *DwoOut,
- CodeGenFileType FileType,
- MCContext &Context) {
- 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(
- getTargetTriple(), MAI.getAssemblerDialect(), MAI, MII, MRI);
-
- // Create a code emitter if asked to show the encoding.
- std::unique_ptr<MCCodeEmitter> MCE;
- if (Options.MCOptions.ShowMCEncoding)
- MCE.reset(getTarget().createMCCodeEmitter(MII, MRI, Context));
-
- std::unique_ptr<MCAsmBackend> MAB(
- getTarget().createMCAsmBackend(STI, MRI, Options.MCOptions));
- auto FOut = llvm::make_unique<formatted_raw_ostream>(Out);
- MCStreamer *S = getTarget().createAsmStreamer(
- Context, std::move(FOut), Options.MCOptions.AsmVerbose,
- Options.MCOptions.MCUseDwarfDirectory, InstPrinter, std::move(MCE),
- std::move(MAB), Options.MCOptions.ShowMCInst);
- AsmStreamer.reset(S);
- break;
- }
- case CGFT_ObjectFile: {
- // Create the code emitter for the target if it exists. If not, .o file
- // emission fails.
- MCCodeEmitter *MCE = getTarget().createMCCodeEmitter(MII, MRI, Context);
- MCAsmBackend *MAB =
- getTarget().createMCAsmBackend(STI, MRI, Options.MCOptions);
- if (!MCE || !MAB)
- return true;
-
- // Don't waste memory on names of temp labels.
- Context.setUseNamesOnTempLabels(false);
-
- Triple T(getTargetTriple().str());
- AsmStreamer.reset(getTarget().createMCObjectStreamer(
- T, Context, std::unique_ptr<MCAsmBackend>(MAB),
- DwoOut ? MAB->createDwoObjectWriter(Out, *DwoOut)
- : MAB->createObjectWriter(Out),
- std::unique_ptr<MCCodeEmitter>(MCE), STI, Options.MCOptions.MCRelaxAll,
- Options.MCOptions.MCIncrementalLinkerCompatible,
- /*DWARFMustBeAtTheEnd*/ true));
- break;
- }
- case CGFT_Null:
- // The Null output is intended for use for performance analysis and testing,
- // not real users.
- AsmStreamer.reset(getTarget().createNullStreamer(Context));
- break;
- }
-
- // Create the AsmPrinter, which takes ownership of AsmStreamer if successful.
- FunctionPass *Printer =
- getTarget().createAsmPrinter(*this, std::move(AsmStreamer));
- if (!Printer)
- return true;
-
- PM.add(Printer);
- return false;
-}
-
-bool LLVMTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
- raw_pwrite_stream &Out,
- raw_pwrite_stream *DwoOut,
- CodeGenFileType FileType,
- bool DisableVerify,
- MachineModuleInfo *MMI) {
- // Add common CodeGen passes.
- if (!MMI)
- MMI = new MachineModuleInfo(this);
- TargetPassConfig *PassConfig =
- addPassesToGenerateCode(*this, PM, DisableVerify, *MMI);
- if (!PassConfig)
- return true;
-
- if (!TargetPassConfig::willCompleteCodeGenPipeline()) {
- PM.add(createPrintMIRPass(Out));
- } else if (addAsmPrinter(PM, Out, DwoOut, FileType, MMI->getContext()))
- return true;
-
- PM.add(createFreeMachineFunctionPass());
- return false;
-}
-
-/// addPassesToEmitMC - Add passes to the specified pass manager to get
-/// machine code emitted with the MCJIT. This method returns true if machine
-/// code is not supported. It fills the MCContext Ctx pointer which can be
-/// used to build custom MCStreamer.
-///
-bool LLVMTargetMachine::addPassesToEmitMC(PassManagerBase &PM, MCContext *&Ctx,
- raw_pwrite_stream &Out,
- bool DisableVerify) {
- // Add common CodeGen passes.
- MachineModuleInfo *MMI = new MachineModuleInfo(this);
- TargetPassConfig *PassConfig =
- addPassesToGenerateCode(*this, PM, DisableVerify, *MMI);
- if (!PassConfig)
- return true;
- assert(TargetPassConfig::willCompleteCodeGenPipeline() &&
- "Cannot emit MC with limited codegen pipeline");
-
- Ctx = &MMI->getContext();
- if (Options.MCOptions.MCSaveTempLabels)
- Ctx->setAllowTemporaryLabels(false);
-
- // Create the code emitter for the target if it exists. If not, .o file
- // emission fails.
- const MCSubtargetInfo &STI = *getMCSubtargetInfo();
- const MCRegisterInfo &MRI = *getMCRegisterInfo();
- MCCodeEmitter *MCE =
- getTarget().createMCCodeEmitter(*getMCInstrInfo(), MRI, *Ctx);
- MCAsmBackend *MAB =
- getTarget().createMCAsmBackend(STI, MRI, Options.MCOptions);
- if (!MCE || !MAB)
- return true;
-
- const Triple &T = getTargetTriple();
- std::unique_ptr<MCStreamer> AsmStreamer(getTarget().createMCObjectStreamer(
- T, *Ctx, std::unique_ptr<MCAsmBackend>(MAB), MAB->createObjectWriter(Out),
- std::unique_ptr<MCCodeEmitter>(MCE), STI, Options.MCOptions.MCRelaxAll,
- Options.MCOptions.MCIncrementalLinkerCompatible,
- /*DWARFMustBeAtTheEnd*/ true));
-
- // Create the AsmPrinter, which takes ownership of AsmStreamer if successful.
- FunctionPass *Printer =
- getTarget().createAsmPrinter(*this, std::move(AsmStreamer));
- if (!Printer)
- return true;
-
- PM.add(Printer);
- PM.add(createFreeMachineFunctionPass());
-
- return false; // success!
-}
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