BackendUtil.cpp | Explore in Territory

//===--- BackendUtil.cpp - LLVM Backend Utilities -------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "clang/CodeGen/BackendUtil.h"
#include "BackendConsumer.h"
#include "LinkInModulesPass.h"
#include "clang/Basic/CodeGenOptions.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/TargetOptions.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "clang/Frontend/Utils.h"
#include "clang/Lex/HeaderSearchOptions.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Bitcode/BitcodeReader.h"
#include "llvm/Bitcode/BitcodeWriter.h"
#include "llvm/Bitcode/BitcodeWriterPass.h"
#include "llvm/CodeGen/RegAllocRegistry.h"
#include "llvm/CodeGen/SchedulerRegistry.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/Frontend/Driver/CodeGenOptions.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DebugInfo.h"
#include "llvm/IR/LegacyPassManager.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/ModuleSummaryIndex.h"
#include "llvm/IR/PassManager.h"
#include "llvm/IR/Verifier.h"
#include "llvm/IRPrinter/IRPrintingPasses.h"
#include "llvm/LTO/LTOBackend.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Object/OffloadBinary.h"
#include "llvm/Passes/PassBuilder.h"
#include "llvm/Passes/PassPlugin.h"
#include "llvm/Passes/StandardInstrumentations.h"
#include "llvm/ProfileData/InstrProfCorrelator.h"
#include "llvm/Support/BuryPointer.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/TimeProfiler.h"
#include "llvm/Support/Timer.h"
#include "llvm/Support/ToolOutputFile.h"
#include "llvm/Support/VirtualFileSystem.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/TargetParser/SubtargetFeature.h"
#include "llvm/TargetParser/Triple.h"
#include "llvm/Transforms/HipStdPar/HipStdPar.h"
#include "llvm/Transforms/IPO/EmbedBitcodePass.h"
#include "llvm/Transforms/IPO/LowerTypeTests.h"
#include "llvm/Transforms/IPO/ThinLTOBitcodeWriter.h"
#include "llvm/Transforms/InstCombine/InstCombine.h"
#include "llvm/Transforms/Instrumentation/AddressSanitizer.h"
#include "llvm/Transforms/Instrumentation/AddressSanitizerOptions.h"
#include "llvm/Transforms/Instrumentation/BoundsChecking.h"
#include "llvm/Transforms/Instrumentation/DataFlowSanitizer.h"
#include "llvm/Transforms/Instrumentation/GCOVProfiler.h"
#include "llvm/Transforms/Instrumentation/HWAddressSanitizer.h"
#include "llvm/Transforms/Instrumentation/InstrProfiling.h"
#include "llvm/Transforms/Instrumentation/KCFI.h"
#include "llvm/Transforms/Instrumentation/LowerAllowCheckPass.h"
#include "llvm/Transforms/Instrumentation/MemProfiler.h"
#include "llvm/Transforms/Instrumentation/MemorySanitizer.h"
#include "llvm/Transforms/Instrumentation/NumericalStabilitySanitizer.h"
#include "llvm/Transforms/Instrumentation/PGOInstrumentation.h"
#include "llvm/Transforms/Instrumentation/RealtimeSanitizer.h"
#include "llvm/Transforms/Instrumentation/SanitizerBinaryMetadata.h"
#include "llvm/Transforms/Instrumentation/SanitizerCoverage.h"
#include "llvm/Transforms/Instrumentation/ThreadSanitizer.h"
#include "llvm/Transforms/ObjCARC.h"
#include "llvm/Transforms/Scalar/EarlyCSE.h"
#include "llvm/Transforms/Scalar/GVN.h"
#include "llvm/Transforms/Scalar/JumpThreading.h"
#include "llvm/Transforms/Utils/Debugify.h"
#include "llvm/Transforms/Utils/ModuleUtils.h"
#include <memory>
#include <optional>
usingnamespaceclang;
usingnamespacellvm;

#define HANDLE_EXTENSION …
#include "llvm/Support/Extension.def"

namespace llvm {
extern cl::opt<bool> PrintPipelinePasses;

// Experiment to move sanitizers earlier.
static cl::opt<bool> ClSanitizeOnOptimizerEarlyEP(
    "sanitizer-early-opt-ep", cl::Optional,
    cl::desc("Insert sanitizers on OptimizerEarlyEP."));

// Experiment to mark cold functions as optsize/minsize/optnone.
// TODO: remove once this is exposed as a proper driver flag.
static cl::opt<PGOOptions::ColdFuncOpt> ClPGOColdFuncAttr(
    "pgo-cold-func-opt", cl::init(PGOOptions::ColdFuncOpt::Default), cl::Hidden,
    cl::desc(
        "Function attribute to apply to cold functions as determined by PGO"),
    cl::values(clEnumValN(PGOOptions::ColdFuncOpt::Default, "default",
                          "Default (no attribute)"),
               clEnumValN(PGOOptions::ColdFuncOpt::OptSize, "optsize",
                          "Mark cold functions with optsize."),
               clEnumValN(PGOOptions::ColdFuncOpt::MinSize, "minsize",
                          "Mark cold functions with minsize."),
               clEnumValN(PGOOptions::ColdFuncOpt::OptNone, "optnone",
                          "Mark cold functions with optnone.")));

extern cl::opt<InstrProfCorrelator::ProfCorrelatorKind> ProfileCorrelate;
} // namespace llvm

namespace {

// Default filename used for profile generation.
std::string getDefaultProfileGenName() { … }

class EmitAssemblyHelper { … };
} // namespace

static SanitizerCoverageOptions
getSancovOptsFromCGOpts(const CodeGenOptions &CGOpts) { … }

static SanitizerBinaryMetadataOptions
getSanitizerBinaryMetadataOptions(const CodeGenOptions &CGOpts) { … }

// Check if ASan should use GC-friendly instrumentation for globals.
// First of all, there is no point if -fdata-sections is off (expect for MachO,
// where this is not a factor). Also, on ELF this feature requires an assembler
// extension that only works with -integrated-as at the moment.
static bool asanUseGlobalsGC(const Triple &T, const CodeGenOptions &CGOpts) { … }

static std::optional<llvm::CodeModel::Model>
getCodeModel(const CodeGenOptions &CodeGenOpts) { … }

static CodeGenFileType getCodeGenFileType(BackendAction Action) { … }

static bool actionRequiresCodeGen(BackendAction Action) { … }

static std::string flattenClangCommandLine(ArrayRef<std::string> Args,
                                           StringRef MainFilename) { … }

static bool initTargetOptions(DiagnosticsEngine &Diags,
                              llvm::TargetOptions &Options,
                              const CodeGenOptions &CodeGenOpts,
                              const clang::TargetOptions &TargetOpts,
                              const LangOptions &LangOpts,
                              const HeaderSearchOptions &HSOpts) { … }

static std::optional<GCOVOptions>
getGCOVOptions(const CodeGenOptions &CodeGenOpts, const LangOptions &LangOpts) { … }

static std::optional<InstrProfOptions>
getInstrProfOptions(const CodeGenOptions &CodeGenOpts,
                    const LangOptions &LangOpts) { … }

static void setCommandLineOpts(const CodeGenOptions &CodeGenOpts) { … }

void EmitAssemblyHelper::CreateTargetMachine(bool MustCreateTM) { … }

bool EmitAssemblyHelper::AddEmitPasses(legacy::PassManager &CodeGenPasses,
                                       BackendAction Action,
                                       raw_pwrite_stream &OS,
                                       raw_pwrite_stream *DwoOS) { … }

static OptimizationLevel mapToLevel(const CodeGenOptions &Opts) { … }

static void addKCFIPass(const Triple &TargetTriple, const LangOptions &LangOpts,
                        PassBuilder &PB) { … }

static void addSanitizers(const Triple &TargetTriple,
                          const CodeGenOptions &CodeGenOpts,
                          const LangOptions &LangOpts, PassBuilder &PB) { … }

void EmitAssemblyHelper::RunOptimizationPipeline(
    BackendAction Action, std::unique_ptr<raw_pwrite_stream> &OS,
    std::unique_ptr<llvm::ToolOutputFile> &ThinLinkOS, BackendConsumer *BC) { … }

void EmitAssemblyHelper::RunCodegenPipeline(
    BackendAction Action, std::unique_ptr<raw_pwrite_stream> &OS,
    std::unique_ptr<llvm::ToolOutputFile> &DwoOS) { … }

void EmitAssemblyHelper::EmitAssembly(BackendAction Action,
                                      std::unique_ptr<raw_pwrite_stream> OS,
                                      BackendConsumer *BC) { … }

static void runThinLTOBackend(
    DiagnosticsEngine &Diags, ModuleSummaryIndex *CombinedIndex,
    llvm::Module *M, const HeaderSearchOptions &HeaderOpts,
    const CodeGenOptions &CGOpts, const clang::TargetOptions &TOpts,
    const LangOptions &LOpts, std::unique_ptr<raw_pwrite_stream> OS,
    std::string SampleProfile, std::string ProfileRemapping,
    BackendAction Action) { … }

void clang::EmitBackendOutput(
    DiagnosticsEngine &Diags, const HeaderSearchOptions &HeaderOpts,
    const CodeGenOptions &CGOpts, const clang::TargetOptions &TOpts,
    const LangOptions &LOpts, StringRef TDesc, llvm::Module *M,
    BackendAction Action, IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS,
    std::unique_ptr<raw_pwrite_stream> OS, BackendConsumer *BC) { … }

// With -fembed-bitcode, save a copy of the llvm IR as data in the
// __LLVM,__bitcode section.
void clang::EmbedBitcode(llvm::Module *M, const CodeGenOptions &CGOpts,
                         llvm::MemoryBufferRef Buf) { … }

void clang::EmbedObject(llvm::Module *M, const CodeGenOptions &CGOpts,
                        DiagnosticsEngine &Diags) { … }
llvm/clang/lib/CodeGen/BackendUtil.cpp
