[llvm] [WIP][llc] Add a reusable LLVMLlcDriver library (PR #221896)
Anutosh Bhat via llvm-commits
llvm-commits at lists.llvm.org
Tue Sep 8 22:57:17 PDT 2026
https://github.com/anutosh491 updated https://github.com/llvm/llvm-project/pull/221896
>From bfb3a1afaff556eae9de0da8e551ac890837cc0b Mon Sep 17 00:00:00 2001
From: anutosh491 <andersonbhat491 at gmail.com>
Date: Sat, 5 Sep 2026 10:43:18 +0530
Subject: [PATCH] [llc] Add a reusable LLVMLlcDriver library
---
llvm/tools/llc/CMakeLists.txt | 15 +-
llvm/tools/llc/llc.cpp | 907 +----------------
llvm/tools/llc/llcdriver.cpp | 912 ++++++++++++++++++
.../llvm-project-overlay/llvm/BUILD.bazel | 23 +-
4 files changed, 948 insertions(+), 909 deletions(-)
create mode 100644 llvm/tools/llc/llcdriver.cpp
diff --git a/llvm/tools/llc/CMakeLists.txt b/llvm/tools/llc/CMakeLists.txt
index 5038a69bf4206..e6f3cf0e1e2fa 100644
--- a/llvm/tools/llc/CMakeLists.txt
+++ b/llvm/tools/llc/CMakeLists.txt
@@ -25,13 +25,26 @@ set(LLVM_LINK_COMPONENTS
Vectorize
)
+# Keep the command-line implementation in a separate library so other LLVM
+# tools can reuse the llc driver without compiling or rewriting llc.cpp.
+add_llvm_library(LLVMLlcDriver
+ STATIC
+ llcdriver.cpp
+ NewPMDriver.cpp
+
+ PARTIAL_SOURCES_INTENDED
+ DEPENDS
+ intrinsics_gen
+ )
+
add_llvm_tool(llc
+ PARTIAL_SOURCES_INTENDED
llc.cpp
- NewPMDriver.cpp
DEPENDS
intrinsics_gen
SUPPORT_PLUGINS
)
+target_link_libraries(llc PRIVATE LLVMLlcDriver)
export_executable_symbols_for_plugins(llc)
diff --git a/llvm/tools/llc/llc.cpp b/llvm/tools/llc/llc.cpp
index 28cf80ee096e9..3b4a6ca4ab775 100644
--- a/llvm/tools/llc/llc.cpp
+++ b/llvm/tools/llc/llc.cpp
@@ -1,915 +1,16 @@
-//===-- llc.cpp - Implement the LLVM Native Code Generator ----------------===//
+//===-- llc.cpp - LLVM Native Code Generator entry point -----------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
-//
-// This is the llc code generator driver. It provides a convenient
-// command-line interface for generating an assembly file or a relocatable file,
-// given LLVM bitcode.
-//
-//===----------------------------------------------------------------------===//
-#include "NewPMDriver.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/ScopeExit.h"
-#include "llvm/ADT/Statistic.h"
-#include "llvm/Analysis/RuntimeLibcallInfo.h"
-#include "llvm/Analysis/TargetLibraryInfo.h"
-#include "llvm/CodeGen/CommandFlags.h"
-#include "llvm/CodeGen/LinkAllAsmWriterComponents.h"
-#include "llvm/CodeGen/LinkAllCodegenComponents.h"
-#include "llvm/CodeGen/MIRParser/MIRParser.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/CodeGen/TargetPassConfig.h"
-#include "llvm/CodeGen/TargetSubtargetInfo.h"
-#include "llvm/IR/AutoUpgrade.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/DiagnosticInfo.h"
-#include "llvm/IR/DiagnosticPrinter.h"
-#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/LLVMRemarkStreamer.h"
-#include "llvm/IR/LegacyPassManager.h"
-#include "llvm/IR/Module.h"
-#include "llvm/IR/Verifier.h"
-#include "llvm/IRReader/IRReader.h"
-#include "llvm/InitializePasses.h"
-#include "llvm/MC/MCTargetOptionsCommandFlags.h"
-#include "llvm/MC/TargetRegistry.h"
-#include "llvm/Pass.h"
-#include "llvm/Plugins/PassPlugin.h"
-#include "llvm/Remarks/HotnessThresholdParser.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/FormattedStream.h"
#include "llvm/Support/InitLLVM.h"
-#include "llvm/Support/PGOOptions.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/SourceMgr.h"
-#include "llvm/Support/TargetSelect.h"
-#include "llvm/Support/TimeProfiler.h"
-#include "llvm/Support/ToolOutputFile.h"
-#include "llvm/Support/WithColor.h"
-#include "llvm/Target/TargetLoweringObjectFile.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/TargetParser/Host.h"
-#include "llvm/TargetParser/SubtargetFeature.h"
-#include "llvm/TargetParser/Triple.h"
-#include "llvm/Transforms/Utils/Cloning.h"
-#include <cassert>
-#include <memory>
-#include <optional>
-using namespace llvm;
-
-static codegen::RegisterCodeGenFlags CGF;
-static codegen::RegisterMTuneFlag MTF;
-static codegen::RegisterSaveStatsFlag SSF;
-
-// General options for llc. Other pass-specific options are specified
-// within the corresponding llc passes, and target-specific options
-// and back-end code generation options are specified with the target machine.
-//
-static cl::opt<std::string>
- InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
-
-static cl::list<std::string>
- InstPrinterOptions("M", cl::desc("InstPrinter options"));
-
-static cl::opt<std::string>
- InputLanguage("x", cl::desc("Input language ('ir' or 'mir')"));
-
-static cl::opt<std::string> OutputFilename("o", cl::desc("Output filename"),
- cl::value_desc("filename"));
-
-static cl::opt<std::string>
- SplitDwarfOutputFile("split-dwarf-output", cl::desc(".dwo output filename"),
- cl::value_desc("filename"));
-
-static cl::opt<unsigned>
- TimeCompilations("time-compilations", cl::Hidden, cl::init(1u),
- cl::value_desc("N"),
- cl::desc("Repeat compilation N times for timing"));
-
-static cl::opt<bool> TimeTrace("time-trace", cl::desc("Record time trace"));
-
-static cl::opt<unsigned> TimeTraceGranularity(
- "time-trace-granularity",
- cl::desc(
- "Minimum time granularity (in microseconds) traced by time profiler"),
- cl::init(500), cl::Hidden);
-
-static cl::opt<std::string>
- TimeTraceFile("time-trace-file",
- cl::desc("Specify time trace file destination"),
- cl::value_desc("filename"));
-
-static cl::opt<std::string>
- BinutilsVersion("binutils-version", cl::Hidden,
- cl::desc("Produced object files can use all ELF features "
- "supported by this binutils version and newer."
- "If -no-integrated-as is specified, the generated "
- "assembly will consider GNU as support."
- "'none' means that all ELF features can be used, "
- "regardless of binutils support"));
-
-static cl::opt<bool>
- PreserveComments("preserve-as-comments", cl::Hidden,
- cl::desc("Preserve Comments in outputted assembly"),
- cl::init(true));
-
-// Determine optimization level.
-static cl::opt<char>
- OptLevel("O",
- cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
- "(default = '-O2')"),
- cl::Prefix, cl::init('2'));
-
-static cl::opt<std::string>
- TargetTriple("mtriple", cl::desc("Override target triple for module"));
-
-static cl::opt<std::string> SplitDwarfFile(
- "split-dwarf-file",
- cl::desc(
- "Specify the name of the .dwo file to encode in the DWARF output"));
-
-static cl::opt<bool> NoVerify("disable-verify", cl::Hidden,
- cl::desc("Do not verify input module"));
-
-static cl::opt<bool> VerifyEach("verify-each",
- cl::desc("Verify after each transform"));
-
-static cl::opt<bool>
- DisableSimplifyLibCalls("disable-simplify-libcalls",
- cl::desc("Disable simplify-libcalls"));
-
-static cl::opt<bool> ShowMCEncoding("show-mc-encoding", cl::Hidden,
- cl::desc("Show encoding in .s output"));
-
-static cl::opt<unsigned>
- OutputAsmVariant("output-asm-variant",
- cl::desc("Syntax variant to use for output printing"));
-
-static cl::opt<bool>
- DwarfDirectory("dwarf-directory", cl::Hidden,
- cl::desc("Use .file directives with an explicit directory"),
- cl::init(true));
-
-static cl::opt<bool> AsmVerbose("asm-verbose",
- cl::desc("Add comments to directives."),
- cl::init(true));
-
-static cl::opt<bool>
- CompileTwice("compile-twice", cl::Hidden,
- cl::desc("Run everything twice, re-using the same pass "
- "manager and verify the result is the same."),
- cl::init(false));
-
-static cl::opt<bool> DiscardValueNames(
- "discard-value-names",
- cl::desc("Discard names from Value (other than GlobalValue)."),
- cl::init(false), cl::Hidden);
-
-static cl::opt<bool>
- PrintMIR2VecVocab("print-mir2vec-vocab", cl::Hidden,
- cl::desc("Print MIR2Vec vocabulary contents"),
- cl::init(false));
-
-static cl::opt<bool>
- PrintMIR2Vec("print-mir2vec", cl::Hidden,
- cl::desc("Print MIR2Vec embeddings for functions"),
- cl::init(false));
-
-static cl::list<std::string> IncludeDirs("I", cl::desc("include search path"));
-
-static cl::opt<bool> RemarksWithHotness(
- "pass-remarks-with-hotness",
- cl::desc("With PGO, include profile count in optimization remarks"),
- cl::Hidden);
-
-static cl::opt<std::optional<uint64_t>, false, remarks::HotnessThresholdParser>
- RemarksHotnessThreshold(
- "pass-remarks-hotness-threshold",
- cl::desc("Minimum profile count required for "
- "an optimization remark to be output. "
- "Use 'auto' to apply the threshold from profile summary."),
- cl::value_desc("N or 'auto'"), cl::init(0), cl::Hidden);
-
-static cl::opt<std::string>
- RemarksFilename("pass-remarks-output",
- cl::desc("Output filename for pass remarks"),
- cl::value_desc("filename"));
-
-static cl::opt<std::string>
- RemarksPasses("pass-remarks-filter",
- cl::desc("Only record optimization remarks from passes whose "
- "names match the given regular expression"),
- cl::value_desc("regex"));
-static cl::opt<std::string> RemarksFormat(
- "pass-remarks-format",
- cl::desc("The format used for serializing remarks (default: YAML)"),
- cl::value_desc("format"), cl::init("yaml"));
+extern "C" int llcMain(int argc, char **argv);
-static cl::list<std::string> PassPlugins("load-pass-plugin",
- cl::desc("Load plugin library"));
-
-static cl::opt<bool> EnableNewPassManager(
- "enable-new-pm", cl::desc("Enable the new pass manager"), cl::init(false));
-
-// This flag specifies a textual description of the optimization pass pipeline
-// to run over the module. This flag switches opt to use the new pass manager
-// infrastructure, completely disabling all of the flags specific to the old
-// pass management.
-static cl::opt<std::string> PassPipeline(
- "passes",
- cl::desc(
- "A textual description of the pass pipeline. To have analysis passes "
- "available before a certain pass, add 'require<foo-analysis>'."));
-static cl::alias PassPipeline2("p", cl::aliasopt(PassPipeline),
- cl::desc("Alias for -passes"));
-
-static std::vector<std::string> &getRunPassNames() {
- static std::vector<std::string> RunPassNames;
- return RunPassNames;
-}
-
-namespace {
-struct RunPassOption {
- void operator=(const std::string &Val) const {
- if (Val.empty())
- return;
- SmallVector<StringRef, 8> PassNames;
- StringRef(Val).split(PassNames, ',', -1, false);
- for (auto PassName : PassNames)
- getRunPassNames().push_back(std::string(PassName));
- }
-};
-} // namespace
-
-static RunPassOption RunPassOpt;
-
-static cl::opt<RunPassOption, true, cl::parser<std::string>> RunPass(
- "run-pass",
- cl::desc("Run compiler only for specified passes (comma separated list)"),
- cl::value_desc("pass-name"), cl::location(RunPassOpt));
-
-// PGO command line options
-enum PGOKind {
- NoPGO,
- SampleUse,
-};
-
-static cl::opt<PGOKind>
- PGOKindFlag("pgo-kind", cl::init(NoPGO), cl::Hidden,
- cl::desc("The kind of profile guided optimization"),
- cl::values(clEnumValN(NoPGO, "nopgo", "Do not use PGO."),
- clEnumValN(SampleUse, "pgo-sample-use-pipeline",
- "Use sampled profile to guide PGO.")));
-
-// Function to set PGO options on TargetMachine based on command line flags.
-static void setPGOOptions(TargetMachine &TM) {
- std::optional<PGOOptions> PGOOpt;
-
- switch (PGOKindFlag) {
- case SampleUse:
- // Use default values for other PGOOptions parameters. This parameter
- // is used to test that PGO data is preserved at -O0.
- PGOOpt = PGOOptions("", "", "", "", PGOOptions::SampleUse,
- PGOOptions::NoCSAction);
- break;
- case NoPGO:
- PGOOpt = std::nullopt;
- break;
- }
-
- if (PGOOpt)
- TM.setPGOOption(PGOOpt);
-}
-
-static int compileModule(char **argv, SmallVectorImpl<PassPlugin> &,
- LLVMContext &Context, std::string &OutputFilename);
-
-[[noreturn]] static void reportError(Twine Msg, StringRef Filename = "") {
- SmallString<256> Prefix;
- if (!Filename.empty()) {
- if (Filename == "-")
- Filename = "<stdin>";
- ("'" + Twine(Filename) + "': ").toStringRef(Prefix);
- }
- WithColor::error(errs(), "llc") << Prefix << Msg << "\n";
- exit(1);
-}
-
-[[noreturn]] static void reportError(Error Err, StringRef Filename) {
- assert(Err);
- handleAllErrors(createFileError(Filename, std::move(Err)),
- [&](const ErrorInfoBase &EI) { reportError(EI.message()); });
- llvm_unreachable("reportError() should not return");
-}
-
-static std::unique_ptr<ToolOutputFile> GetOutputStream(Triple::OSType OS) {
- // If we don't yet have an output filename, make one.
- if (OutputFilename.empty()) {
- if (InputFilename == "-")
- OutputFilename = "-";
- else {
- // If InputFilename ends in .bc or .ll, remove it.
- StringRef IFN = InputFilename;
- if (IFN.ends_with(".bc") || IFN.ends_with(".ll"))
- OutputFilename = std::string(IFN.drop_back(3));
- else if (IFN.ends_with(".mir"))
- OutputFilename = std::string(IFN.drop_back(4));
- else
- OutputFilename = std::string(IFN);
-
- switch (codegen::getFileType()) {
- case CodeGenFileType::AssemblyFile:
- OutputFilename += ".s";
- break;
- case CodeGenFileType::ObjectFile:
- if (OS == Triple::Win32)
- OutputFilename += ".obj";
- else
- OutputFilename += ".o";
- break;
- case CodeGenFileType::Null:
- OutputFilename = "-";
- break;
- }
- }
- }
-
- // Decide if we need "binary" output.
- bool Binary = false;
- switch (codegen::getFileType()) {
- case CodeGenFileType::AssemblyFile:
- break;
- case CodeGenFileType::ObjectFile:
- case CodeGenFileType::Null:
- Binary = true;
- break;
- }
-
- // Open the file.
- std::error_code EC;
- sys::fs::OpenFlags OpenFlags = sys::fs::OF_None;
- if (!Binary)
- OpenFlags |= sys::fs::OF_TextWithCRLF;
- auto FDOut = std::make_unique<ToolOutputFile>(OutputFilename, EC, OpenFlags);
- if (EC)
- reportError(EC.message());
- return FDOut;
-}
-
-// main - Entry point for the llc compiler.
-//
int main(int argc, char **argv) {
- InitLLVM X(argc, argv);
-
- // Enable debug stream buffering.
- EnableDebugBuffering = true;
-
- // Initialize targets first, so that --version shows registered targets.
- InitializeAllTargets();
- InitializeAllTargetMCs();
- InitializeAllAsmPrinters();
- InitializeAllAsmParsers();
-
- // Initialize codegen and IR passes used by llc so that the -print-after,
- // -print-before, and -stop-after options work.
- PassRegistry *Registry = PassRegistry::getPassRegistry();
- initializeCore(*Registry);
- initializeCodeGen(*Registry);
- initializeLoopStrengthReducePass(*Registry);
- initializePostInlineEntryExitInstrumenterPass(*Registry);
- initializeUnreachableBlockElimLegacyPassPass(*Registry);
- initializeConstantHoistingLegacyPassPass(*Registry);
- initializeScalarOpts(*Registry);
- initializeIPO(*Registry);
- initializeVectorization(*Registry);
- initializeScalarizeMaskedMemIntrinLegacyPassPass(*Registry);
- initializeTransformUtils(*Registry);
-
- // Initialize debugging passes.
- initializeScavengerTestPass(*Registry);
-
- SmallVector<PassPlugin, 1> PluginList;
- PassPlugins.setCallback([&](const std::string &PluginPath) {
- auto Plugin = PassPlugin::Load(PluginPath);
- if (!Plugin)
- reportFatalUsageError(Plugin.takeError());
- PluginList.emplace_back(Plugin.get());
- });
-
- // Register the Target and CPU printer for --version.
- cl::AddExtraVersionPrinter(sys::printDefaultTargetAndDetectedCPU);
- // Register the target printer for --version.
- cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
-
- cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
-
- if (!PassPipeline.empty() && !getRunPassNames().empty()) {
- errs() << "The `llc -run-pass=...` syntax for the new pass manager is "
- "not supported, please use `llc -passes=<pipeline>` (or the `-p` "
- "alias for a more concise version).\n";
- return 1;
- }
-
- if (TimeTrace)
- timeTraceProfilerInitialize(TimeTraceGranularity, argv[0]);
- llvm::scope_exit TimeTraceScopeExit([]() {
- if (TimeTrace) {
- if (auto E = timeTraceProfilerWrite(TimeTraceFile, OutputFilename)) {
- handleAllErrors(std::move(E), [&](const StringError &SE) {
- errs() << SE.getMessage() << "\n";
- });
- return;
- }
- timeTraceProfilerCleanup();
- }
- });
-
- LLVMContext Context;
- Context.setDiscardValueNames(DiscardValueNames);
-
- // Set a diagnostic handler that doesn't exit on the first error
- Context.setDiagnosticHandler(std::make_unique<LLCDiagnosticHandler>());
-
- Expected<LLVMRemarkFileHandle> RemarksFileOrErr =
- setupLLVMOptimizationRemarks(Context, RemarksFilename, RemarksPasses,
- RemarksFormat, RemarksWithHotness,
- RemarksHotnessThreshold);
- if (Error E = RemarksFileOrErr.takeError())
- reportError(std::move(E), RemarksFilename);
- LLVMRemarkFileHandle RemarksFile = std::move(*RemarksFileOrErr);
-
- codegen::MaybeEnableStatistics();
- std::string OutputFilename;
-
- if (InputLanguage != "" && InputLanguage != "ir" && InputLanguage != "mir")
- reportError("input language must be '', 'IR' or 'MIR'");
-
- // Compile the module TimeCompilations times to give better compile time
- // metrics.
- for (unsigned I = TimeCompilations; I; --I)
- if (int RetVal = compileModule(argv, PluginList, Context, OutputFilename))
- return RetVal;
-
- if (RemarksFile)
- RemarksFile->keep();
-
- return codegen::MaybeSaveStatistics(OutputFilename, "llc");
-}
-
-static bool addPass(PassManagerBase &PM, const char *argv0, StringRef PassName,
- TargetPassConfig &TPC) {
- if (PassName == "none")
- return false;
-
- const PassRegistry *PR = PassRegistry::getPassRegistry();
- const PassInfo *PI = PR->getPassInfo(PassName);
- if (!PI) {
- WithColor::error(errs(), argv0)
- << "run-pass " << PassName << " is not registered.\n";
- return true;
- }
-
- Pass *P;
- if (PI->getNormalCtor())
- P = PI->getNormalCtor()();
- else {
- WithColor::error(errs(), argv0)
- << "cannot create pass: " << PI->getPassName() << "\n";
- return true;
- }
- std::string Banner = std::string("After ") + std::string(P->getPassName());
- TPC.addMachinePrePasses();
- PM.add(P);
- TPC.addMachinePostPasses(Banner);
-
- return false;
-}
-
-static int compileModule(char **argv, SmallVectorImpl<PassPlugin> &PluginList,
- LLVMContext &Context, std::string &OutputFilename) {
- // Load the module to be compiled...
- SMDiagnostic Err;
- std::unique_ptr<Module> M;
- std::unique_ptr<MIRParser> MIR;
- Triple TheTriple;
- std::string CPUStr = codegen::getCPUStr();
- std::string TuneCPUStr = codegen::getTuneCPUStr();
- std::string FeaturesStr = codegen::getFeaturesStr();
-
- // Set attributes on functions as loaded from MIR from command line arguments.
- auto setMIRFunctionAttributes = [&CPUStr, &TuneCPUStr,
- &FeaturesStr](Function &F) {
- codegen::setFunctionAttributes(F, CPUStr, FeaturesStr, TuneCPUStr);
- };
-
- CodeGenOptLevel OLvl;
- if (auto Level = CodeGenOpt::parseLevel(OptLevel)) {
- OLvl = *Level;
- } else {
- WithColor::error(errs(), argv[0]) << "invalid optimization level.\n";
- return 1;
- }
-
- // Parse 'none' or '$major.$minor'. Disallow -binutils-version=0 because we
- // use that to indicate the MC default.
- if (!BinutilsVersion.empty() && BinutilsVersion != "none") {
- StringRef V = BinutilsVersion.getValue();
- unsigned Num;
- if (V.consumeInteger(10, Num) || Num == 0 ||
- !(V.empty() ||
- (V.consume_front(".") && !V.consumeInteger(10, Num) && V.empty()))) {
- WithColor::error(errs(), argv[0])
- << "invalid -binutils-version, accepting 'none' or major.minor\n";
- return 1;
- }
- }
- TargetOptions Options;
- auto InitializeOptions = [&](const Triple &TheTriple) {
- Options = codegen::InitTargetOptionsFromCodeGenFlags(TheTriple);
-
- if (Options.XCOFFReadOnlyPointers) {
- if (!TheTriple.isOSAIX())
- reportError("-mxcoff-roptr option is only supported on AIX",
- InputFilename);
-
- // Since the storage mapping class is specified per csect,
- // without using data sections, it is less effective to use read-only
- // pointers. Using read-only pointers may cause other RO variables in the
- // same csect to become RW when the linker acts upon `-bforceimprw`;
- // therefore, we require that separate data sections are used in the
- // presence of ReadOnlyPointers. We respect the setting of data-sections
- // since we have not found reasons to do otherwise that overcome the user
- // surprise of not respecting the setting.
- if (!Options.DataSections)
- reportError("-mxcoff-roptr option must be used with -data-sections",
- InputFilename);
- }
-
- if (TheTriple.isX86() &&
- codegen::getFuseFPOps() != FPOpFusion::FPOpFusionMode::Standard)
- WithColor::warning(errs(), argv[0])
- << "X86 backend ignores --fp-contract setting; use IR fast-math "
- "flags instead.";
-
- Options.MCOptions.BinutilsVersion =
- MCTargetOptions::parseBinutilsVersion(BinutilsVersion);
- Options.MCOptions.ShowMCEncoding = ShowMCEncoding;
- Options.MCOptions.AsmVerbose = AsmVerbose;
- Options.MCOptions.PreserveAsmComments = PreserveComments;
- if (OutputAsmVariant.getNumOccurrences())
- Options.MCOptions.OutputAsmVariant = OutputAsmVariant;
- Options.MCOptions.IASSearchPaths = IncludeDirs;
- Options.MCOptions.InstPrinterOptions = InstPrinterOptions;
- Options.MCOptions.SplitDwarfFile = SplitDwarfFile;
- if (DwarfDirectory.getPosition()) {
- Options.MCOptions.MCUseDwarfDirectory =
- DwarfDirectory ? MCTargetOptions::EnableDwarfDirectory
- : MCTargetOptions::DisableDwarfDirectory;
- } else {
- // -dwarf-directory is not set explicitly. Some assemblers
- // (e.g. GNU as or ptxas) do not support `.file directory'
- // syntax prior to DWARFv5. Let the target decide the default
- // value.
- Options.MCOptions.MCUseDwarfDirectory =
- MCTargetOptions::DefaultDwarfDirectory;
- }
- };
-
- std::optional<Reloc::Model> RM = codegen::getExplicitRelocModel();
- std::optional<CodeModel::Model> CM = codegen::getExplicitCodeModel();
-
- const Target *TheTarget = nullptr;
- std::unique_ptr<TargetMachine> Target;
-
- // If user just wants to list available options, skip module loading
- auto MAttrs = codegen::getMAttrs();
- bool SkipModule =
- CPUStr == "help" || TuneCPUStr == "help" || is_contained(MAttrs, "help");
- if (SkipModule) {
- if (!TargetTriple.empty())
- TheTriple = Triple(Triple::normalize(TargetTriple));
- else
- TheTriple = Triple(sys::getDefaultTargetTriple());
-
- // Get the target specific parser.
- std::string Error;
- TheTarget =
- TargetRegistry::lookupTarget(codegen::getMArch(), TheTriple, Error);
- if (!TheTarget) {
- WithColor::error(errs(), argv[0]) << Error << "\n";
- return 1;
- }
-
- InitializeOptions(TheTriple);
- // Pass "help" as CPU for -mtune=help
- std::string SkipModuleCPU = (TuneCPUStr == "help" ? "help" : CPUStr);
- // Create the target machine just to print the help info. Use unique_ptr
- // to avoid a memory leak.
- Target = std::unique_ptr<TargetMachine>(TheTarget->createTargetMachine(
- TheTriple, SkipModuleCPU, FeaturesStr, Options, RM, CM, OLvl));
- if (!Target) {
- WithColor::error(errs(), argv[0])
- << "could not allocate target machine\n";
- return 1;
- }
-
- // If we don't have a module then just exit now. We do this down
- // here since the CPU/Feature help is underneath the target machine
- // creation.
- return 0;
- }
-
- auto SetDataLayout = [&](StringRef DataLayoutTargetTriple,
- StringRef OldDLStr) -> std::optional<std::string> {
- // If we are supposed to override the target triple, do so now.
- std::string IRTargetTriple = DataLayoutTargetTriple.str();
- if (!TargetTriple.empty())
- IRTargetTriple = Triple::normalize(TargetTriple);
- TheTriple = Triple(IRTargetTriple);
- if (TheTriple.getTriple().empty())
- TheTriple.setTriple(sys::getDefaultTargetTriple());
-
- std::string Error;
- TheTarget =
- TargetRegistry::lookupTarget(codegen::getMArch(), TheTriple, Error);
- if (!TheTarget) {
- WithColor::error(errs(), argv[0]) << Error << "\n";
- exit(1);
- }
-
- InitializeOptions(TheTriple);
- Target = std::unique_ptr<TargetMachine>(TheTarget->createTargetMachine(
- TheTriple, CPUStr, FeaturesStr, Options, RM, CM, OLvl));
- if (!Target) {
- WithColor::error(errs(), argv[0])
- << "could not allocate target machine\n";
- exit(1);
- }
-
- // Set PGO options based on command line flags
- setPGOOptions(*Target);
-
- return Target->createDataLayout().getStringRepresentation();
- };
- if (InputLanguage == "mir" ||
- (InputLanguage == "" && StringRef(InputFilename).ends_with(".mir"))) {
- MIR = createMIRParserFromFile(InputFilename, Err, Context,
- setMIRFunctionAttributes);
- if (MIR)
- M = MIR->parseIRModule(SetDataLayout);
- } else {
- M = parseIRFile(InputFilename, Err, Context,
- ParserCallbacks(SetDataLayout));
- }
- if (!M) {
- Err.print(argv[0], WithColor::error(errs(), argv[0]));
- return 1;
- }
-
- M->setTargetTriple(TheTriple);
-
- std::optional<CodeModel::Model> CM_IR = M->getCodeModel();
- if (!CM && CM_IR)
- Target->setCodeModel(*CM_IR);
- if (std::optional<uint64_t> LDT = codegen::getExplicitLargeDataThreshold())
- Target->setLargeDataThreshold(*LDT);
-
- // Figure out where we are going to send the output.
- std::unique_ptr<ToolOutputFile> Out = GetOutputStream(TheTriple.getOS());
- if (!Out)
- return 1;
-
- // Ensure the filename is passed down to CodeViewDebug.
- Target->Options.ObjectFilenameForDebug = Out->outputFilename();
-
- // Return a copy of the output filename via the output param
- OutputFilename = Out->outputFilename();
-
- // Tell target that this tool is not necessarily used with argument ABI
- // compliance (i.e. narrow integer argument extensions).
- Target->Options.VerifyArgABICompliance = 0;
-
- std::unique_ptr<ToolOutputFile> DwoOut;
- if (!SplitDwarfOutputFile.empty()) {
- std::error_code EC;
- DwoOut = std::make_unique<ToolOutputFile>(SplitDwarfOutputFile, EC,
- sys::fs::OF_None);
- if (EC)
- reportError(EC.message(), SplitDwarfOutputFile);
- }
-
- // Add an appropriate TargetLibraryInfo pass for the module's triple.
- TargetLibraryInfoImpl TLII(M->getTargetTriple(), Target->Options.VecLib);
-
- // The -disable-simplify-libcalls flag actually disables all builtin optzns.
- if (DisableSimplifyLibCalls)
- TLII.disableAllFunctions();
-
- // Verify module immediately to catch problems before doInitialization() is
- // called on any passes.
- if (!NoVerify && verifyModule(*M, &errs()))
- reportError("input module cannot be verified", InputFilename);
-
- // Override function attributes based on CPUStr, TuneCPUStr, FeaturesStr, and
- // command line flags.
- codegen::setFunctionAttributes(*M, CPUStr, FeaturesStr, TuneCPUStr);
-
- for (auto &Plugin : PluginList) {
- CodeGenFileType CGFT = codegen::getFileType();
- if (Plugin.invokePreCodeGenCallback(*M, *Target, CGFT, Out->os())) {
- // TODO: Deduplicate code with below and the NewPMDriver.
- if (Context.getDiagHandlerPtr()->HasErrors)
- exit(1);
- Out->keep();
- return 0;
- }
- }
-
- if (mc::getExplicitRelaxAll() &&
- codegen::getFileType() != CodeGenFileType::ObjectFile)
- WithColor::warning(errs(), argv[0])
- << ": warning: ignoring -mc-relax-all because filetype != obj";
-
- VerifierKind VK = VerifierKind::InputOutput;
- if (NoVerify)
- VK = VerifierKind::None;
- else if (VerifyEach)
- VK = VerifierKind::EachPass;
-
- // Use the NewPM if the user specifies -passes (NewPM specific), specifically
- // requests the NewPM with -enable-new-pm, or the target defaults to the
- // NewPM, the user has not explicitly disabled the NewPM with
- // -enable-new-pm=false, and the user has not specified -run-pass.
- if (!PassPipeline.empty() ||
- (EnableNewPassManager.getNumOccurrences() > 0 && EnableNewPassManager) ||
- (Target->shouldDefaultToNewPM() &&
- !(EnableNewPassManager.getNumOccurrences() && !EnableNewPassManager) &&
- getRunPassNames().empty())) {
- return compileModuleWithNewPM(
- argv[0], std::move(M), std::move(MIR), std::move(Target),
- std::move(Out), std::move(DwoOut), Context, TLII, VK, PassPipeline,
- PluginList, codegen::getFileType());
- }
-
- // Build up all of the passes that we want to do to the module.
- legacy::PassManager PM;
- PM.add(new TargetLibraryInfoWrapperPass(TLII));
- PM.add(new RuntimeLibraryInfoWrapper(
- Target->Options.ExceptionModel, Target->Options.EABIVersion,
- Options.MCOptions.ABIName, Target->Options.VecLib));
-
- {
- raw_pwrite_stream *OS = &Out->os();
-
- // Manually do the buffering rather than using buffer_ostream,
- // so we can memcmp the contents in CompileTwice mode
- SmallVector<char, 0> Buffer;
- std::unique_ptr<raw_svector_ostream> BOS;
- if ((codegen::getFileType() != CodeGenFileType::AssemblyFile &&
- !Out->os().supportsSeeking()) ||
- CompileTwice) {
- BOS = std::make_unique<raw_svector_ostream>(Buffer);
- OS = BOS.get();
- }
-
- const char *argv0 = argv[0];
- MachineModuleInfoWrapperPass *MMIWP =
- new MachineModuleInfoWrapperPass(Target.get());
-
- // Set a temporary diagnostic handler. This is used before
- // MachineModuleInfoWrapperPass::doInitialization for features like -M.
- bool HasMCErrors = false;
- MCContext &MCCtx = MMIWP->getMMI().getContext();
- MCCtx.setDiagnosticHandler([&](const SMDiagnostic &SMD, bool IsInlineAsm,
- const SourceMgr &SrcMgr,
- std::vector<const MDNode *> &LocInfos) {
- WithColor::error(errs(), argv0) << SMD.getMessage() << '\n';
- HasMCErrors = true;
- });
-
- // Construct a custom pass pipeline that starts after instruction
- // selection.
- if (!getRunPassNames().empty()) {
- if (!MIR) {
- WithColor::error(errs(), argv[0])
- << "run-pass is for .mir file only.\n";
- delete MMIWP;
- return 1;
- }
- TargetPassConfig *PTPC = Target->createPassConfig(PM);
- TargetPassConfig &TPC = *PTPC;
- if (TPC.hasLimitedCodeGenPipeline()) {
- WithColor::error(errs(), argv[0])
- << "run-pass cannot be used with "
- << TPC.getLimitedCodeGenPipelineReason() << ".\n";
- delete PTPC;
- delete MMIWP;
- return 1;
- }
-
- TPC.setDisableVerify(NoVerify);
- PM.add(&TPC);
- PM.add(MMIWP);
- TPC.printAndVerify("");
- for (const std::string &RunPassName : getRunPassNames()) {
- if (addPass(PM, argv0, RunPassName, TPC))
- return 1;
- }
- TPC.setInitialized();
- PM.add(createPrintMIRPass(*OS));
-
- // Add MIR2Vec vocabulary printer if requested
- if (PrintMIR2VecVocab) {
- PM.add(createMIR2VecVocabPrinterLegacyPass(errs()));
- }
-
- // Add MIR2Vec printer if requested
- if (PrintMIR2Vec) {
- PM.add(createMIR2VecPrinterLegacyPass(errs()));
- }
-
- PM.add(createFreeMachineFunctionPass());
- } else {
- if (Target->addPassesToEmitFile(PM, *OS, DwoOut ? &DwoOut->os() : nullptr,
- codegen::getFileType(), NoVerify,
- MMIWP)) {
- if (!HasMCErrors)
- reportError("target does not support generation of this file type");
- }
-
- // Add MIR2Vec vocabulary printer if requested
- if (PrintMIR2VecVocab) {
- PM.add(createMIR2VecVocabPrinterLegacyPass(errs()));
- }
-
- // Add MIR2Vec printer if requested
- if (PrintMIR2Vec) {
- PM.add(createMIR2VecPrinterLegacyPass(errs()));
- }
- }
-
- Target->getObjFileLowering()->Initialize(MMIWP->getMMI().getContext(),
- *Target);
- if (MIR) {
- assert(MMIWP && "Forgot to create MMIWP?");
- if (MIR->parseMachineFunctions(*M, MMIWP->getMMI()))
- return 1;
- }
-
- // Before executing passes, print the final values of the LLVM options.
- cl::PrintOptionValues();
-
- // If requested, run the pass manager over the same module again,
- // to catch any bugs due to persistent state in the passes. Note that
- // opt has the same functionality, so it may be worth abstracting this out
- // in the future.
- SmallVector<char, 0> CompileTwiceBuffer;
- if (CompileTwice) {
- std::unique_ptr<Module> M2(llvm::CloneModule(*M));
- PM.run(*M2);
- CompileTwiceBuffer = Buffer;
- Buffer.clear();
- }
-
- PM.run(*M);
-
- if (Context.getDiagHandlerPtr()->HasErrors || HasMCErrors)
- return 1;
-
- // Compare the two outputs and make sure they're the same
- if (CompileTwice) {
- if (Buffer.size() != CompileTwiceBuffer.size() ||
- (memcmp(Buffer.data(), CompileTwiceBuffer.data(), Buffer.size()) !=
- 0)) {
- errs()
- << "Running the pass manager twice changed the output.\n"
- "Writing the result of the second run to the specified output\n"
- "To generate the one-run comparison binary, just run without\n"
- "the compile-twice option\n";
- Out->os() << Buffer;
- Out->keep();
- return 1;
- }
- }
-
- if (BOS) {
- Out->os() << Buffer;
- }
- }
-
- // Declare success.
- Out->keep();
- if (DwoOut)
- DwoOut->keep();
-
- return 0;
+ llvm::InitLLVM X(argc, argv);
+ return llcMain(argc, argv);
}
diff --git a/llvm/tools/llc/llcdriver.cpp b/llvm/tools/llc/llcdriver.cpp
new file mode 100644
index 0000000000000..051e977c7549a
--- /dev/null
+++ b/llvm/tools/llc/llcdriver.cpp
@@ -0,0 +1,912 @@
+//===-- llcdriver.cpp - Implement the LLVM Native Code Generator ----------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This is the llc code generator driver. It provides a convenient
+// command-line interface for generating an assembly file or a relocatable file,
+// given LLVM bitcode.
+//
+//===----------------------------------------------------------------------===//
+
+#include "NewPMDriver.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/ScopeExit.h"
+#include "llvm/ADT/Statistic.h"
+#include "llvm/Analysis/RuntimeLibcallInfo.h"
+#include "llvm/Analysis/TargetLibraryInfo.h"
+#include "llvm/CodeGen/CommandFlags.h"
+#include "llvm/CodeGen/LinkAllAsmWriterComponents.h"
+#include "llvm/CodeGen/LinkAllCodegenComponents.h"
+#include "llvm/CodeGen/MIRParser/MIRParser.h"
+#include "llvm/CodeGen/MachineFunctionPass.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/CodeGen/TargetPassConfig.h"
+#include "llvm/CodeGen/TargetSubtargetInfo.h"
+#include "llvm/IR/AutoUpgrade.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DiagnosticInfo.h"
+#include "llvm/IR/DiagnosticPrinter.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/LLVMRemarkStreamer.h"
+#include "llvm/IR/LegacyPassManager.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/IRReader/IRReader.h"
+#include "llvm/InitializePasses.h"
+#include "llvm/MC/MCTargetOptionsCommandFlags.h"
+#include "llvm/MC/TargetRegistry.h"
+#include "llvm/Pass.h"
+#include "llvm/Plugins/PassPlugin.h"
+#include "llvm/Remarks/HotnessThresholdParser.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/FormattedStream.h"
+#include "llvm/Support/PGOOptions.h"
+#include "llvm/Support/Path.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/TimeProfiler.h"
+#include "llvm/Support/ToolOutputFile.h"
+#include "llvm/Support/WithColor.h"
+#include "llvm/Target/TargetLoweringObjectFile.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/TargetParser/Host.h"
+#include "llvm/TargetParser/SubtargetFeature.h"
+#include "llvm/TargetParser/Triple.h"
+#include "llvm/Transforms/Utils/Cloning.h"
+#include <cassert>
+#include <memory>
+#include <optional>
+using namespace llvm;
+
+static codegen::RegisterCodeGenFlags CGF;
+static codegen::RegisterMTuneFlag MTF;
+static codegen::RegisterSaveStatsFlag SSF;
+
+// General options for llc. Other pass-specific options are specified
+// within the corresponding llc passes, and target-specific options
+// and back-end code generation options are specified with the target machine.
+//
+static cl::opt<std::string>
+ InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
+
+static cl::list<std::string>
+ InstPrinterOptions("M", cl::desc("InstPrinter options"));
+
+static cl::opt<std::string>
+ InputLanguage("x", cl::desc("Input language ('ir' or 'mir')"));
+
+static cl::opt<std::string> OutputFilename("o", cl::desc("Output filename"),
+ cl::value_desc("filename"));
+
+static cl::opt<std::string>
+ SplitDwarfOutputFile("split-dwarf-output", cl::desc(".dwo output filename"),
+ cl::value_desc("filename"));
+
+static cl::opt<unsigned>
+ TimeCompilations("time-compilations", cl::Hidden, cl::init(1u),
+ cl::value_desc("N"),
+ cl::desc("Repeat compilation N times for timing"));
+
+static cl::opt<bool> TimeTrace("time-trace", cl::desc("Record time trace"));
+
+static cl::opt<unsigned> TimeTraceGranularity(
+ "time-trace-granularity",
+ cl::desc(
+ "Minimum time granularity (in microseconds) traced by time profiler"),
+ cl::init(500), cl::Hidden);
+
+static cl::opt<std::string>
+ TimeTraceFile("time-trace-file",
+ cl::desc("Specify time trace file destination"),
+ cl::value_desc("filename"));
+
+static cl::opt<std::string>
+ BinutilsVersion("binutils-version", cl::Hidden,
+ cl::desc("Produced object files can use all ELF features "
+ "supported by this binutils version and newer."
+ "If -no-integrated-as is specified, the generated "
+ "assembly will consider GNU as support."
+ "'none' means that all ELF features can be used, "
+ "regardless of binutils support"));
+
+static cl::opt<bool>
+ PreserveComments("preserve-as-comments", cl::Hidden,
+ cl::desc("Preserve Comments in outputted assembly"),
+ cl::init(true));
+
+// Determine optimization level.
+static cl::opt<char>
+ OptLevel("O",
+ cl::desc("Optimization level. [-O0, -O1, -O2, or -O3] "
+ "(default = '-O2')"),
+ cl::Prefix, cl::init('2'));
+
+static cl::opt<std::string>
+ TargetTriple("mtriple", cl::desc("Override target triple for module"));
+
+static cl::opt<std::string> SplitDwarfFile(
+ "split-dwarf-file",
+ cl::desc(
+ "Specify the name of the .dwo file to encode in the DWARF output"));
+
+static cl::opt<bool> NoVerify("disable-verify", cl::Hidden,
+ cl::desc("Do not verify input module"));
+
+static cl::opt<bool> VerifyEach("verify-each",
+ cl::desc("Verify after each transform"));
+
+static cl::opt<bool>
+ DisableSimplifyLibCalls("disable-simplify-libcalls",
+ cl::desc("Disable simplify-libcalls"));
+
+static cl::opt<bool> ShowMCEncoding("show-mc-encoding", cl::Hidden,
+ cl::desc("Show encoding in .s output"));
+
+static cl::opt<unsigned>
+ OutputAsmVariant("output-asm-variant",
+ cl::desc("Syntax variant to use for output printing"));
+
+static cl::opt<bool>
+ DwarfDirectory("dwarf-directory", cl::Hidden,
+ cl::desc("Use .file directives with an explicit directory"),
+ cl::init(true));
+
+static cl::opt<bool> AsmVerbose("asm-verbose",
+ cl::desc("Add comments to directives."),
+ cl::init(true));
+
+static cl::opt<bool>
+ CompileTwice("compile-twice", cl::Hidden,
+ cl::desc("Run everything twice, re-using the same pass "
+ "manager and verify the result is the same."),
+ cl::init(false));
+
+static cl::opt<bool> DiscardValueNames(
+ "discard-value-names",
+ cl::desc("Discard names from Value (other than GlobalValue)."),
+ cl::init(false), cl::Hidden);
+
+static cl::opt<bool>
+ PrintMIR2VecVocab("print-mir2vec-vocab", cl::Hidden,
+ cl::desc("Print MIR2Vec vocabulary contents"),
+ cl::init(false));
+
+static cl::opt<bool>
+ PrintMIR2Vec("print-mir2vec", cl::Hidden,
+ cl::desc("Print MIR2Vec embeddings for functions"),
+ cl::init(false));
+
+static cl::list<std::string> IncludeDirs("I", cl::desc("include search path"));
+
+static cl::opt<bool> RemarksWithHotness(
+ "pass-remarks-with-hotness",
+ cl::desc("With PGO, include profile count in optimization remarks"),
+ cl::Hidden);
+
+static cl::opt<std::optional<uint64_t>, false, remarks::HotnessThresholdParser>
+ RemarksHotnessThreshold(
+ "pass-remarks-hotness-threshold",
+ cl::desc("Minimum profile count required for "
+ "an optimization remark to be output. "
+ "Use 'auto' to apply the threshold from profile summary."),
+ cl::value_desc("N or 'auto'"), cl::init(0), cl::Hidden);
+
+static cl::opt<std::string>
+ RemarksFilename("pass-remarks-output",
+ cl::desc("Output filename for pass remarks"),
+ cl::value_desc("filename"));
+
+static cl::opt<std::string>
+ RemarksPasses("pass-remarks-filter",
+ cl::desc("Only record optimization remarks from passes whose "
+ "names match the given regular expression"),
+ cl::value_desc("regex"));
+
+static cl::opt<std::string> RemarksFormat(
+ "pass-remarks-format",
+ cl::desc("The format used for serializing remarks (default: YAML)"),
+ cl::value_desc("format"), cl::init("yaml"));
+
+static cl::list<std::string> PassPlugins("load-pass-plugin",
+ cl::desc("Load plugin library"));
+
+static cl::opt<bool> EnableNewPassManager(
+ "enable-new-pm", cl::desc("Enable the new pass manager"), cl::init(false));
+
+// This flag specifies a textual description of the optimization pass pipeline
+// to run over the module. This flag switches opt to use the new pass manager
+// infrastructure, completely disabling all of the flags specific to the old
+// pass management.
+static cl::opt<std::string> PassPipeline(
+ "passes",
+ cl::desc(
+ "A textual description of the pass pipeline. To have analysis passes "
+ "available before a certain pass, add 'require<foo-analysis>'."));
+static cl::alias PassPipeline2("p", cl::aliasopt(PassPipeline),
+ cl::desc("Alias for -passes"));
+
+static std::vector<std::string> &getRunPassNames() {
+ static std::vector<std::string> RunPassNames;
+ return RunPassNames;
+}
+
+namespace {
+struct RunPassOption {
+ void operator=(const std::string &Val) const {
+ if (Val.empty())
+ return;
+ SmallVector<StringRef, 8> PassNames;
+ StringRef(Val).split(PassNames, ',', -1, false);
+ for (auto PassName : PassNames)
+ getRunPassNames().push_back(std::string(PassName));
+ }
+};
+} // namespace
+
+static RunPassOption RunPassOpt;
+
+static cl::opt<RunPassOption, true, cl::parser<std::string>> RunPass(
+ "run-pass",
+ cl::desc("Run compiler only for specified passes (comma separated list)"),
+ cl::value_desc("pass-name"), cl::location(RunPassOpt));
+
+// PGO command line options
+enum PGOKind {
+ NoPGO,
+ SampleUse,
+};
+
+static cl::opt<PGOKind>
+ PGOKindFlag("pgo-kind", cl::init(NoPGO), cl::Hidden,
+ cl::desc("The kind of profile guided optimization"),
+ cl::values(clEnumValN(NoPGO, "nopgo", "Do not use PGO."),
+ clEnumValN(SampleUse, "pgo-sample-use-pipeline",
+ "Use sampled profile to guide PGO.")));
+
+// Function to set PGO options on TargetMachine based on command line flags.
+static void setPGOOptions(TargetMachine &TM) {
+ std::optional<PGOOptions> PGOOpt;
+
+ switch (PGOKindFlag) {
+ case SampleUse:
+ // Use default values for other PGOOptions parameters. This parameter
+ // is used to test that PGO data is preserved at -O0.
+ PGOOpt = PGOOptions("", "", "", "", PGOOptions::SampleUse,
+ PGOOptions::NoCSAction);
+ break;
+ case NoPGO:
+ PGOOpt = std::nullopt;
+ break;
+ }
+
+ if (PGOOpt)
+ TM.setPGOOption(PGOOpt);
+}
+
+static int compileModule(char **argv, SmallVectorImpl<PassPlugin> &,
+ LLVMContext &Context, std::string &OutputFilename);
+
+[[noreturn]] static void reportError(Twine Msg, StringRef Filename = "") {
+ SmallString<256> Prefix;
+ if (!Filename.empty()) {
+ if (Filename == "-")
+ Filename = "<stdin>";
+ ("'" + Twine(Filename) + "': ").toStringRef(Prefix);
+ }
+ WithColor::error(errs(), "llc") << Prefix << Msg << "\n";
+ exit(1);
+}
+
+[[noreturn]] static void reportError(Error Err, StringRef Filename) {
+ assert(Err);
+ handleAllErrors(createFileError(Filename, std::move(Err)),
+ [&](const ErrorInfoBase &EI) { reportError(EI.message()); });
+ llvm_unreachable("reportError() should not return");
+}
+
+static std::unique_ptr<ToolOutputFile> GetOutputStream(Triple::OSType OS) {
+ // If we don't yet have an output filename, make one.
+ if (OutputFilename.empty()) {
+ if (InputFilename == "-")
+ OutputFilename = "-";
+ else {
+ // If InputFilename ends in .bc or .ll, remove it.
+ StringRef IFN = InputFilename;
+ if (IFN.ends_with(".bc") || IFN.ends_with(".ll"))
+ OutputFilename = std::string(IFN.drop_back(3));
+ else if (IFN.ends_with(".mir"))
+ OutputFilename = std::string(IFN.drop_back(4));
+ else
+ OutputFilename = std::string(IFN);
+
+ switch (codegen::getFileType()) {
+ case CodeGenFileType::AssemblyFile:
+ OutputFilename += ".s";
+ break;
+ case CodeGenFileType::ObjectFile:
+ if (OS == Triple::Win32)
+ OutputFilename += ".obj";
+ else
+ OutputFilename += ".o";
+ break;
+ case CodeGenFileType::Null:
+ OutputFilename = "-";
+ break;
+ }
+ }
+ }
+
+ // Decide if we need "binary" output.
+ bool Binary = false;
+ switch (codegen::getFileType()) {
+ case CodeGenFileType::AssemblyFile:
+ break;
+ case CodeGenFileType::ObjectFile:
+ case CodeGenFileType::Null:
+ Binary = true;
+ break;
+ }
+
+ // Open the file.
+ std::error_code EC;
+ sys::fs::OpenFlags OpenFlags = sys::fs::OF_None;
+ if (!Binary)
+ OpenFlags |= sys::fs::OF_TextWithCRLF;
+ auto FDOut = std::make_unique<ToolOutputFile>(OutputFilename, EC, OpenFlags);
+ if (EC)
+ reportError(EC.message());
+ return FDOut;
+}
+
+// Entry point for the llc compiler.
+//
+extern "C" int llcMain(int argc, char **argv) {
+ // Enable debug stream buffering.
+ EnableDebugBuffering = true;
+
+ // Initialize targets first, so that --version shows registered targets.
+ InitializeAllTargets();
+ InitializeAllTargetMCs();
+ InitializeAllAsmPrinters();
+ InitializeAllAsmParsers();
+
+ // Initialize codegen and IR passes used by llc so that the -print-after,
+ // -print-before, and -stop-after options work.
+ PassRegistry *Registry = PassRegistry::getPassRegistry();
+ initializeCore(*Registry);
+ initializeCodeGen(*Registry);
+ initializeLoopStrengthReducePass(*Registry);
+ initializePostInlineEntryExitInstrumenterPass(*Registry);
+ initializeUnreachableBlockElimLegacyPassPass(*Registry);
+ initializeConstantHoistingLegacyPassPass(*Registry);
+ initializeScalarOpts(*Registry);
+ initializeIPO(*Registry);
+ initializeVectorization(*Registry);
+ initializeScalarizeMaskedMemIntrinLegacyPassPass(*Registry);
+ initializeTransformUtils(*Registry);
+
+ // Initialize debugging passes.
+ initializeScavengerTestPass(*Registry);
+
+ SmallVector<PassPlugin, 1> PluginList;
+ PassPlugins.setCallback([&](const std::string &PluginPath) {
+ auto Plugin = PassPlugin::Load(PluginPath);
+ if (!Plugin)
+ reportFatalUsageError(Plugin.takeError());
+ PluginList.emplace_back(Plugin.get());
+ });
+
+ // Register the Target and CPU printer for --version.
+ cl::AddExtraVersionPrinter(sys::printDefaultTargetAndDetectedCPU);
+ // Register the target printer for --version.
+ cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);
+
+ cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
+
+ if (!PassPipeline.empty() && !getRunPassNames().empty()) {
+ errs() << "The `llc -run-pass=...` syntax for the new pass manager is "
+ "not supported, please use `llc -passes=<pipeline>` (or the `-p` "
+ "alias for a more concise version).\n";
+ return 1;
+ }
+
+ if (TimeTrace)
+ timeTraceProfilerInitialize(TimeTraceGranularity, argv[0]);
+ llvm::scope_exit TimeTraceScopeExit([]() {
+ if (TimeTrace) {
+ if (auto E = timeTraceProfilerWrite(TimeTraceFile, OutputFilename)) {
+ handleAllErrors(std::move(E), [&](const StringError &SE) {
+ errs() << SE.getMessage() << "\n";
+ });
+ return;
+ }
+ timeTraceProfilerCleanup();
+ }
+ });
+
+ LLVMContext Context;
+ Context.setDiscardValueNames(DiscardValueNames);
+
+ // Set a diagnostic handler that doesn't exit on the first error
+ Context.setDiagnosticHandler(std::make_unique<LLCDiagnosticHandler>());
+
+ Expected<LLVMRemarkFileHandle> RemarksFileOrErr =
+ setupLLVMOptimizationRemarks(Context, RemarksFilename, RemarksPasses,
+ RemarksFormat, RemarksWithHotness,
+ RemarksHotnessThreshold);
+ if (Error E = RemarksFileOrErr.takeError())
+ reportError(std::move(E), RemarksFilename);
+ LLVMRemarkFileHandle RemarksFile = std::move(*RemarksFileOrErr);
+
+ codegen::MaybeEnableStatistics();
+ std::string OutputFilename;
+
+ if (InputLanguage != "" && InputLanguage != "ir" && InputLanguage != "mir")
+ reportError("input language must be '', 'IR' or 'MIR'");
+
+ // Compile the module TimeCompilations times to give better compile time
+ // metrics.
+ for (unsigned I = TimeCompilations; I; --I)
+ if (int RetVal = compileModule(argv, PluginList, Context, OutputFilename))
+ return RetVal;
+
+ if (RemarksFile)
+ RemarksFile->keep();
+
+ return codegen::MaybeSaveStatistics(OutputFilename, "llc");
+}
+
+static bool addPass(PassManagerBase &PM, const char *argv0, StringRef PassName,
+ TargetPassConfig &TPC) {
+ if (PassName == "none")
+ return false;
+
+ const PassRegistry *PR = PassRegistry::getPassRegistry();
+ const PassInfo *PI = PR->getPassInfo(PassName);
+ if (!PI) {
+ WithColor::error(errs(), argv0)
+ << "run-pass " << PassName << " is not registered.\n";
+ return true;
+ }
+
+ Pass *P;
+ if (PI->getNormalCtor())
+ P = PI->getNormalCtor()();
+ else {
+ WithColor::error(errs(), argv0)
+ << "cannot create pass: " << PI->getPassName() << "\n";
+ return true;
+ }
+ std::string Banner = std::string("After ") + std::string(P->getPassName());
+ TPC.addMachinePrePasses();
+ PM.add(P);
+ TPC.addMachinePostPasses(Banner);
+
+ return false;
+}
+
+static int compileModule(char **argv, SmallVectorImpl<PassPlugin> &PluginList,
+ LLVMContext &Context, std::string &OutputFilename) {
+ // Load the module to be compiled...
+ SMDiagnostic Err;
+ std::unique_ptr<Module> M;
+ std::unique_ptr<MIRParser> MIR;
+ Triple TheTriple;
+ std::string CPUStr = codegen::getCPUStr();
+ std::string TuneCPUStr = codegen::getTuneCPUStr();
+ std::string FeaturesStr = codegen::getFeaturesStr();
+
+ // Set attributes on functions as loaded from MIR from command line arguments.
+ auto setMIRFunctionAttributes = [&CPUStr, &TuneCPUStr,
+ &FeaturesStr](Function &F) {
+ codegen::setFunctionAttributes(F, CPUStr, FeaturesStr, TuneCPUStr);
+ };
+
+ CodeGenOptLevel OLvl;
+ if (auto Level = CodeGenOpt::parseLevel(OptLevel)) {
+ OLvl = *Level;
+ } else {
+ WithColor::error(errs(), argv[0]) << "invalid optimization level.\n";
+ return 1;
+ }
+
+ // Parse 'none' or '$major.$minor'. Disallow -binutils-version=0 because we
+ // use that to indicate the MC default.
+ if (!BinutilsVersion.empty() && BinutilsVersion != "none") {
+ StringRef V = BinutilsVersion.getValue();
+ unsigned Num;
+ if (V.consumeInteger(10, Num) || Num == 0 ||
+ !(V.empty() ||
+ (V.consume_front(".") && !V.consumeInteger(10, Num) && V.empty()))) {
+ WithColor::error(errs(), argv[0])
+ << "invalid -binutils-version, accepting 'none' or major.minor\n";
+ return 1;
+ }
+ }
+ TargetOptions Options;
+ auto InitializeOptions = [&](const Triple &TheTriple) {
+ Options = codegen::InitTargetOptionsFromCodeGenFlags(TheTriple);
+
+ if (Options.XCOFFReadOnlyPointers) {
+ if (!TheTriple.isOSAIX())
+ reportError("-mxcoff-roptr option is only supported on AIX",
+ InputFilename);
+
+ // Since the storage mapping class is specified per csect,
+ // without using data sections, it is less effective to use read-only
+ // pointers. Using read-only pointers may cause other RO variables in the
+ // same csect to become RW when the linker acts upon `-bforceimprw`;
+ // therefore, we require that separate data sections are used in the
+ // presence of ReadOnlyPointers. We respect the setting of data-sections
+ // since we have not found reasons to do otherwise that overcome the user
+ // surprise of not respecting the setting.
+ if (!Options.DataSections)
+ reportError("-mxcoff-roptr option must be used with -data-sections",
+ InputFilename);
+ }
+
+ if (TheTriple.isX86() &&
+ codegen::getFuseFPOps() != FPOpFusion::FPOpFusionMode::Standard)
+ WithColor::warning(errs(), argv[0])
+ << "X86 backend ignores --fp-contract setting; use IR fast-math "
+ "flags instead.";
+
+ Options.MCOptions.BinutilsVersion =
+ MCTargetOptions::parseBinutilsVersion(BinutilsVersion);
+ Options.MCOptions.ShowMCEncoding = ShowMCEncoding;
+ Options.MCOptions.AsmVerbose = AsmVerbose;
+ Options.MCOptions.PreserveAsmComments = PreserveComments;
+ if (OutputAsmVariant.getNumOccurrences())
+ Options.MCOptions.OutputAsmVariant = OutputAsmVariant;
+ Options.MCOptions.IASSearchPaths = IncludeDirs;
+ Options.MCOptions.InstPrinterOptions = InstPrinterOptions;
+ Options.MCOptions.SplitDwarfFile = SplitDwarfFile;
+ if (DwarfDirectory.getPosition()) {
+ Options.MCOptions.MCUseDwarfDirectory =
+ DwarfDirectory ? MCTargetOptions::EnableDwarfDirectory
+ : MCTargetOptions::DisableDwarfDirectory;
+ } else {
+ // -dwarf-directory is not set explicitly. Some assemblers
+ // (e.g. GNU as or ptxas) do not support `.file directory'
+ // syntax prior to DWARFv5. Let the target decide the default
+ // value.
+ Options.MCOptions.MCUseDwarfDirectory =
+ MCTargetOptions::DefaultDwarfDirectory;
+ }
+ };
+
+ std::optional<Reloc::Model> RM = codegen::getExplicitRelocModel();
+ std::optional<CodeModel::Model> CM = codegen::getExplicitCodeModel();
+
+ const Target *TheTarget = nullptr;
+ std::unique_ptr<TargetMachine> Target;
+
+ // If user just wants to list available options, skip module loading
+ auto MAttrs = codegen::getMAttrs();
+ bool SkipModule =
+ CPUStr == "help" || TuneCPUStr == "help" || is_contained(MAttrs, "help");
+ if (SkipModule) {
+ if (!TargetTriple.empty())
+ TheTriple = Triple(Triple::normalize(TargetTriple));
+ else
+ TheTriple = Triple(sys::getDefaultTargetTriple());
+
+ // Get the target specific parser.
+ std::string Error;
+ TheTarget =
+ TargetRegistry::lookupTarget(codegen::getMArch(), TheTriple, Error);
+ if (!TheTarget) {
+ WithColor::error(errs(), argv[0]) << Error << "\n";
+ return 1;
+ }
+
+ InitializeOptions(TheTriple);
+ // Pass "help" as CPU for -mtune=help
+ std::string SkipModuleCPU = (TuneCPUStr == "help" ? "help" : CPUStr);
+ // Create the target machine just to print the help info. Use unique_ptr
+ // to avoid a memory leak.
+ Target = std::unique_ptr<TargetMachine>(TheTarget->createTargetMachine(
+ TheTriple, SkipModuleCPU, FeaturesStr, Options, RM, CM, OLvl));
+ if (!Target) {
+ WithColor::error(errs(), argv[0])
+ << "could not allocate target machine\n";
+ return 1;
+ }
+
+ // If we don't have a module then just exit now. We do this down
+ // here since the CPU/Feature help is underneath the target machine
+ // creation.
+ return 0;
+ }
+
+ auto SetDataLayout = [&](StringRef DataLayoutTargetTriple,
+ StringRef OldDLStr) -> std::optional<std::string> {
+ // If we are supposed to override the target triple, do so now.
+ std::string IRTargetTriple = DataLayoutTargetTriple.str();
+ if (!TargetTriple.empty())
+ IRTargetTriple = Triple::normalize(TargetTriple);
+ TheTriple = Triple(IRTargetTriple);
+ if (TheTriple.getTriple().empty())
+ TheTriple.setTriple(sys::getDefaultTargetTriple());
+
+ std::string Error;
+ TheTarget =
+ TargetRegistry::lookupTarget(codegen::getMArch(), TheTriple, Error);
+ if (!TheTarget) {
+ WithColor::error(errs(), argv[0]) << Error << "\n";
+ exit(1);
+ }
+
+ InitializeOptions(TheTriple);
+ Target = std::unique_ptr<TargetMachine>(TheTarget->createTargetMachine(
+ TheTriple, CPUStr, FeaturesStr, Options, RM, CM, OLvl));
+ if (!Target) {
+ WithColor::error(errs(), argv[0])
+ << "could not allocate target machine\n";
+ exit(1);
+ }
+
+ // Set PGO options based on command line flags
+ setPGOOptions(*Target);
+
+ return Target->createDataLayout().getStringRepresentation();
+ };
+ if (InputLanguage == "mir" ||
+ (InputLanguage == "" && StringRef(InputFilename).ends_with(".mir"))) {
+ MIR = createMIRParserFromFile(InputFilename, Err, Context,
+ setMIRFunctionAttributes);
+ if (MIR)
+ M = MIR->parseIRModule(SetDataLayout);
+ } else {
+ M = parseIRFile(InputFilename, Err, Context,
+ ParserCallbacks(SetDataLayout));
+ }
+ if (!M) {
+ Err.print(argv[0], WithColor::error(errs(), argv[0]));
+ return 1;
+ }
+
+ M->setTargetTriple(TheTriple);
+
+ std::optional<CodeModel::Model> CM_IR = M->getCodeModel();
+ if (!CM && CM_IR)
+ Target->setCodeModel(*CM_IR);
+ if (std::optional<uint64_t> LDT = codegen::getExplicitLargeDataThreshold())
+ Target->setLargeDataThreshold(*LDT);
+
+ // Figure out where we are going to send the output.
+ std::unique_ptr<ToolOutputFile> Out = GetOutputStream(TheTriple.getOS());
+ if (!Out)
+ return 1;
+
+ // Ensure the filename is passed down to CodeViewDebug.
+ Target->Options.ObjectFilenameForDebug = Out->outputFilename();
+
+ // Return a copy of the output filename via the output param
+ OutputFilename = Out->outputFilename();
+
+ // Tell target that this tool is not necessarily used with argument ABI
+ // compliance (i.e. narrow integer argument extensions).
+ Target->Options.VerifyArgABICompliance = 0;
+
+ std::unique_ptr<ToolOutputFile> DwoOut;
+ if (!SplitDwarfOutputFile.empty()) {
+ std::error_code EC;
+ DwoOut = std::make_unique<ToolOutputFile>(SplitDwarfOutputFile, EC,
+ sys::fs::OF_None);
+ if (EC)
+ reportError(EC.message(), SplitDwarfOutputFile);
+ }
+
+ // Add an appropriate TargetLibraryInfo pass for the module's triple.
+ TargetLibraryInfoImpl TLII(M->getTargetTriple(), Target->Options.VecLib);
+
+ // The -disable-simplify-libcalls flag actually disables all builtin optzns.
+ if (DisableSimplifyLibCalls)
+ TLII.disableAllFunctions();
+
+ // Verify module immediately to catch problems before doInitialization() is
+ // called on any passes.
+ if (!NoVerify && verifyModule(*M, &errs()))
+ reportError("input module cannot be verified", InputFilename);
+
+ // Override function attributes based on CPUStr, TuneCPUStr, FeaturesStr, and
+ // command line flags.
+ codegen::setFunctionAttributes(*M, CPUStr, FeaturesStr, TuneCPUStr);
+
+ for (auto &Plugin : PluginList) {
+ CodeGenFileType CGFT = codegen::getFileType();
+ if (Plugin.invokePreCodeGenCallback(*M, *Target, CGFT, Out->os())) {
+ // TODO: Deduplicate code with below and the NewPMDriver.
+ if (Context.getDiagHandlerPtr()->HasErrors)
+ exit(1);
+ Out->keep();
+ return 0;
+ }
+ }
+
+ if (mc::getExplicitRelaxAll() &&
+ codegen::getFileType() != CodeGenFileType::ObjectFile)
+ WithColor::warning(errs(), argv[0])
+ << ": warning: ignoring -mc-relax-all because filetype != obj";
+
+ VerifierKind VK = VerifierKind::InputOutput;
+ if (NoVerify)
+ VK = VerifierKind::None;
+ else if (VerifyEach)
+ VK = VerifierKind::EachPass;
+
+ // Use the NewPM if the user specifies -passes (NewPM specific), specifically
+ // requests the NewPM with -enable-new-pm, or the target defaults to the
+ // NewPM, the user has not explicitly disabled the NewPM with
+ // -enable-new-pm=false, and the user has not specified -run-pass.
+ if (!PassPipeline.empty() ||
+ (EnableNewPassManager.getNumOccurrences() > 0 && EnableNewPassManager) ||
+ (Target->shouldDefaultToNewPM() &&
+ !(EnableNewPassManager.getNumOccurrences() && !EnableNewPassManager) &&
+ getRunPassNames().empty())) {
+ return compileModuleWithNewPM(
+ argv[0], std::move(M), std::move(MIR), std::move(Target),
+ std::move(Out), std::move(DwoOut), Context, TLII, VK, PassPipeline,
+ PluginList, codegen::getFileType());
+ }
+
+ // Build up all of the passes that we want to do to the module.
+ legacy::PassManager PM;
+ PM.add(new TargetLibraryInfoWrapperPass(TLII));
+ PM.add(new RuntimeLibraryInfoWrapper(
+ Target->Options.ExceptionModel, Target->Options.EABIVersion,
+ Options.MCOptions.ABIName, Target->Options.VecLib));
+
+ {
+ raw_pwrite_stream *OS = &Out->os();
+
+ // Manually do the buffering rather than using buffer_ostream,
+ // so we can memcmp the contents in CompileTwice mode
+ SmallVector<char, 0> Buffer;
+ std::unique_ptr<raw_svector_ostream> BOS;
+ if ((codegen::getFileType() != CodeGenFileType::AssemblyFile &&
+ !Out->os().supportsSeeking()) ||
+ CompileTwice) {
+ BOS = std::make_unique<raw_svector_ostream>(Buffer);
+ OS = BOS.get();
+ }
+
+ const char *argv0 = argv[0];
+ MachineModuleInfoWrapperPass *MMIWP =
+ new MachineModuleInfoWrapperPass(Target.get());
+
+ // Set a temporary diagnostic handler. This is used before
+ // MachineModuleInfoWrapperPass::doInitialization for features like -M.
+ bool HasMCErrors = false;
+ MCContext &MCCtx = MMIWP->getMMI().getContext();
+ MCCtx.setDiagnosticHandler([&](const SMDiagnostic &SMD, bool IsInlineAsm,
+ const SourceMgr &SrcMgr,
+ std::vector<const MDNode *> &LocInfos) {
+ WithColor::error(errs(), argv0) << SMD.getMessage() << '\n';
+ HasMCErrors = true;
+ });
+
+ // Construct a custom pass pipeline that starts after instruction
+ // selection.
+ if (!getRunPassNames().empty()) {
+ if (!MIR) {
+ WithColor::error(errs(), argv[0])
+ << "run-pass is for .mir file only.\n";
+ delete MMIWP;
+ return 1;
+ }
+ TargetPassConfig *PTPC = Target->createPassConfig(PM);
+ TargetPassConfig &TPC = *PTPC;
+ if (TPC.hasLimitedCodeGenPipeline()) {
+ WithColor::error(errs(), argv[0])
+ << "run-pass cannot be used with "
+ << TPC.getLimitedCodeGenPipelineReason() << ".\n";
+ delete PTPC;
+ delete MMIWP;
+ return 1;
+ }
+
+ TPC.setDisableVerify(NoVerify);
+ PM.add(&TPC);
+ PM.add(MMIWP);
+ TPC.printAndVerify("");
+ for (const std::string &RunPassName : getRunPassNames()) {
+ if (addPass(PM, argv0, RunPassName, TPC))
+ return 1;
+ }
+ TPC.setInitialized();
+ PM.add(createPrintMIRPass(*OS));
+
+ // Add MIR2Vec vocabulary printer if requested
+ if (PrintMIR2VecVocab) {
+ PM.add(createMIR2VecVocabPrinterLegacyPass(errs()));
+ }
+
+ // Add MIR2Vec printer if requested
+ if (PrintMIR2Vec) {
+ PM.add(createMIR2VecPrinterLegacyPass(errs()));
+ }
+
+ PM.add(createFreeMachineFunctionPass());
+ } else {
+ if (Target->addPassesToEmitFile(PM, *OS, DwoOut ? &DwoOut->os() : nullptr,
+ codegen::getFileType(), NoVerify,
+ MMIWP)) {
+ if (!HasMCErrors)
+ reportError("target does not support generation of this file type");
+ }
+
+ // Add MIR2Vec vocabulary printer if requested
+ if (PrintMIR2VecVocab) {
+ PM.add(createMIR2VecVocabPrinterLegacyPass(errs()));
+ }
+
+ // Add MIR2Vec printer if requested
+ if (PrintMIR2Vec) {
+ PM.add(createMIR2VecPrinterLegacyPass(errs()));
+ }
+ }
+
+ Target->getObjFileLowering()->Initialize(MMIWP->getMMI().getContext(),
+ *Target);
+ if (MIR) {
+ assert(MMIWP && "Forgot to create MMIWP?");
+ if (MIR->parseMachineFunctions(*M, MMIWP->getMMI()))
+ return 1;
+ }
+
+ // Before executing passes, print the final values of the LLVM options.
+ cl::PrintOptionValues();
+
+ // If requested, run the pass manager over the same module again,
+ // to catch any bugs due to persistent state in the passes. Note that
+ // opt has the same functionality, so it may be worth abstracting this out
+ // in the future.
+ SmallVector<char, 0> CompileTwiceBuffer;
+ if (CompileTwice) {
+ std::unique_ptr<Module> M2(llvm::CloneModule(*M));
+ PM.run(*M2);
+ CompileTwiceBuffer = Buffer;
+ Buffer.clear();
+ }
+
+ PM.run(*M);
+
+ if (Context.getDiagHandlerPtr()->HasErrors || HasMCErrors)
+ return 1;
+
+ // Compare the two outputs and make sure they're the same
+ if (CompileTwice) {
+ if (Buffer.size() != CompileTwiceBuffer.size() ||
+ (memcmp(Buffer.data(), CompileTwiceBuffer.data(), Buffer.size()) !=
+ 0)) {
+ errs()
+ << "Running the pass manager twice changed the output.\n"
+ "Writing the result of the second run to the specified output\n"
+ "To generate the one-run comparison binary, just run without\n"
+ "the compile-twice option\n";
+ Out->os() << Buffer;
+ Out->keep();
+ return 1;
+ }
+ }
+
+ if (BOS) {
+ Out->os() << Buffer;
+ }
+ }
+
+ // Declare success.
+ Out->keep();
+ if (DwoOut)
+ DwoOut->keep();
+
+ return 0;
+}
diff --git a/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel b/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel
index 30e7693a2563e..11e80ee03cbae 100644
--- a/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel
+++ b/utils/bazel/llvm-project-overlay/llvm/BUILD.bazel
@@ -4988,14 +4988,16 @@ llvm_driver_cc_binary(
deps = [":dsymutil-lib"],
)
-cc_binary(
- name = "llc",
- srcs = glob([
- "tools/llc/*.cpp",
+cc_library(
+ name = "llc-driver",
+ srcs = [
+ "tools/llc/NewPMDriver.cpp",
+ "tools/llc/llcdriver.cpp",
+ ],
+ hdrs = glob([
"tools/llc/*.h",
]),
copts = llvm_copts,
- stamp = 0,
deps = [
":AllTargetsAsmParsers",
":AllTargetsCodeGens",
@@ -5019,6 +5021,17 @@ cc_binary(
],
)
+cc_binary(
+ name = "llc",
+ srcs = ["tools/llc/llc.cpp"],
+ copts = llvm_copts,
+ stamp = 0,
+ deps = [
+ ":Support",
+ ":llc-driver",
+ ],
+)
+
cc_binary(
name = "lli",
srcs = glob([
More information about the llvm-commits
mailing list