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+//===- opt.cpp - The LLVM Modular Optimizer -------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+//
+// Optimizations may be specified an arbitrary number of times on the command
+// line, They are run in the order specified.
+//
+//===----------------------------------------------------------------------===//
+
+#include "BreakpointPrinter.h"
+#include "Debugify.h"
+#include "NewPMDriver.h"
+#include "PassPrinters.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Analysis/CallGraph.h"
+#include "llvm/Analysis/CallGraphSCCPass.h"
+#include "llvm/Analysis/LoopPass.h"
+#include "llvm/Analysis/RegionPass.h"
+#include "llvm/Analysis/TargetLibraryInfo.h"
+#include "llvm/Analysis/TargetTransformInfo.h"
+#include "llvm/Bitcode/BitcodeWriterPass.h"
+#include "llvm/CodeGen/CommandFlags.inc"
+#include "llvm/CodeGen/TargetPassConfig.h"
+#include "llvm/Config/llvm-config.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DebugInfo.h"
+#include "llvm/IR/IRPrintingPasses.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/LegacyPassManager.h"
+#include "llvm/IR/LegacyPassNameParser.h"
+#include "llvm/IR/Module.h"
+#include "llvm/IR/RemarkStreamer.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/IRReader/IRReader.h"
+#include "llvm/InitializePasses.h"
+#include "llvm/LinkAllIR.h"
+#include "llvm/LinkAllPasses.h"
+#include "llvm/MC/SubtargetFeature.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Host.h"
+#include "llvm/Support/InitLLVM.h"
+#include "llvm/Support/PluginLoader.h"
+#include "llvm/Support/SourceMgr.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/Support/TargetRegistry.h"
+#include "llvm/Support/TargetSelect.h"
+#include "llvm/Support/ToolOutputFile.h"
+#include "llvm/Support/YAMLTraits.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/Transforms/Coroutines.h"
+#include "llvm/Transforms/IPO/AlwaysInliner.h"
+#include "llvm/Transforms/IPO/PassManagerBuilder.h"
+#include "llvm/Transforms/Utils/Cloning.h"
+#include <algorithm>
+#include <memory>
+using namespace llvm;
+using namespace opt_tool;
+
+// The OptimizationList is automatically populated with registered Passes by the
+// PassNameParser.
+//
+static cl::list<const PassInfo*, bool, PassNameParser>
+PassList(cl::desc("Optimizations available:"));
+
+// 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 for optimizing"),
+ cl::Hidden);
+
+// Other command line options...
+//
+static cl::opt<std::string>
+InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
+ cl::init("-"), cl::value_desc("filename"));
+
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Override output filename"),
+ cl::value_desc("filename"));
+
+static cl::opt<bool>
+Force("f", cl::desc("Enable binary output on terminals"));
+
+static cl::opt<bool>
+PrintEachXForm("p", cl::desc("Print module after each transformation"));
+
+static cl::opt<bool>
+NoOutput("disable-output",
+ cl::desc("Do not write result bitcode file"), cl::Hidden);
+
+static cl::opt<bool>
+OutputAssembly("S", cl::desc("Write output as LLVM assembly"));
+
+static cl::opt<bool>
+ OutputThinLTOBC("thinlto-bc",
+ cl::desc("Write output as ThinLTO-ready bitcode"));
+
+static cl::opt<bool>
+ SplitLTOUnit("thinlto-split-lto-unit",
+ cl::desc("Enable splitting of a ThinLTO LTOUnit"));
+
+static cl::opt<std::string> ThinLinkBitcodeFile(
+ "thin-link-bitcode-file", cl::value_desc("filename"),
+ cl::desc(
+ "A file in which to write minimized bitcode for the thin link only"));
+
+static cl::opt<bool>
+NoVerify("disable-verify", cl::desc("Do not run the verifier"), cl::Hidden);
+
+static cl::opt<bool>
+VerifyEach("verify-each", cl::desc("Verify after each transform"));
+
+static cl::opt<bool>
+ DisableDITypeMap("disable-debug-info-type-map",
+ cl::desc("Don't use a uniquing type map for debug info"));
+
+static cl::opt<bool>
+StripDebug("strip-debug",
+ cl::desc("Strip debugger symbol info from translation unit"));
+
+static cl::opt<bool>
+ StripNamedMetadata("strip-named-metadata",
+ cl::desc("Strip module-level named metadata"));
+
+static cl::opt<bool> DisableInline("disable-inlining",
+ cl::desc("Do not run the inliner pass"));
+
+static cl::opt<bool>
+DisableOptimizations("disable-opt",
+ cl::desc("Do not run any optimization passes"));
+
+static cl::opt<bool>
+StandardLinkOpts("std-link-opts",
+ cl::desc("Include the standard link time optimizations"));
+
+static cl::opt<bool>
+OptLevelO0("O0",
+ cl::desc("Optimization level 0. Similar to clang -O0"));
+
+static cl::opt<bool>
+OptLevelO1("O1",
+ cl::desc("Optimization level 1. Similar to clang -O1"));
+
+static cl::opt<bool>
+OptLevelO2("O2",
+ cl::desc("Optimization level 2. Similar to clang -O2"));
+
+static cl::opt<bool>
+OptLevelOs("Os",
+ cl::desc("Like -O2 with extra optimizations for size. Similar to clang -Os"));
+
+static cl::opt<bool>
+OptLevelOz("Oz",
+ cl::desc("Like -Os but reduces code size further. Similar to clang -Oz"));
+
+static cl::opt<bool>
+OptLevelO3("O3",
+ cl::desc("Optimization level 3. Similar to clang -O3"));
+
+static cl::opt<unsigned>
+CodeGenOptLevel("codegen-opt-level",
+ cl::desc("Override optimization level for codegen hooks"));
+
+static cl::opt<std::string>
+TargetTriple("mtriple", cl::desc("Override target triple for module"));
+
+static cl::opt<bool>
+DisableLoopUnrolling("disable-loop-unrolling",
+ cl::desc("Disable loop unrolling in all relevant passes"),
+ cl::init(false));
+
+static cl::opt<bool>
+DisableSLPVectorization("disable-slp-vectorization",
+ cl::desc("Disable the slp vectorization pass"),
+ cl::init(false));
+
+static cl::opt<bool> EmitSummaryIndex("module-summary",
+ cl::desc("Emit module summary index"),
+ cl::init(false));
+
+static cl::opt<bool> EmitModuleHash("module-hash", cl::desc("Emit module hash"),
+ cl::init(false));
+
+static cl::opt<bool>
+DisableSimplifyLibCalls("disable-simplify-libcalls",
+ cl::desc("Disable simplify-libcalls"));
+
+static cl::opt<bool>
+Quiet("q", cl::desc("Obsolete option"), cl::Hidden);
+
+static cl::alias
+QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
+
+static cl::opt<bool>
+AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
+
+static cl::opt<bool> EnableDebugify(
+ "enable-debugify",
+ cl::desc(
+ "Start the pipeline with debugify and end it with check-debugify"));
+
+static cl::opt<bool> DebugifyEach(
+ "debugify-each",
+ cl::desc(
+ "Start each pass with debugify and end it with check-debugify"));
+
+static cl::opt<std::string>
+ DebugifyExport("debugify-export",
+ cl::desc("Export per-pass debugify statistics to this file"),
+ cl::value_desc("filename"), cl::init(""));
+
+static cl::opt<bool>
+PrintBreakpoints("print-breakpoints-for-testing",
+ cl::desc("Print select breakpoints location for testing"));
+
+static cl::opt<std::string> ClDataLayout("data-layout",
+ cl::desc("data layout string to use"),
+ cl::value_desc("layout-string"),
+ cl::init(""));
+
+static cl::opt<bool> PreserveBitcodeUseListOrder(
+ "preserve-bc-uselistorder",
+ cl::desc("Preserve use-list order when writing LLVM bitcode."),
+ cl::init(true), cl::Hidden);
+
+static cl::opt<bool> PreserveAssemblyUseListOrder(
+ "preserve-ll-uselistorder",
+ cl::desc("Preserve use-list order when writing LLVM assembly."),
+ cl::init(false), cl::Hidden);
+
+static cl::opt<bool>
+ RunTwice("run-twice",
+ cl::desc("Run all passes twice, re-using the same pass manager."),
+ cl::init(false), cl::Hidden);
+
+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> Coroutines(
+ "enable-coroutines",
+ cl::desc("Enable coroutine passes."),
+ cl::init(false), cl::Hidden);
+
+static cl::opt<bool> RemarksWithHotness(
+ "pass-remarks-with-hotness",
+ cl::desc("With PGO, include profile count in optimization remarks"),
+ cl::Hidden);
+
+static cl::opt<unsigned>
+ RemarksHotnessThreshold("pass-remarks-hotness-threshold",
+ cl::desc("Minimum profile count required for "
+ "an optimization remark to be output"),
+ 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"));
+
+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(InstrGen, "pgo-instr-gen-pipeline",
+ "Instrument the IR to generate profile."),
+ clEnumValN(InstrUse, "pgo-instr-use-pipeline",
+ "Use instrumented profile to guide PGO."),
+ clEnumValN(SampleUse, "pgo-sample-use-pipeline",
+ "Use sampled profile to guide PGO.")));
+cl::opt<std::string> ProfileFile("profile-file",
+ cl::desc("Path to the profile."), cl::Hidden);
+
+cl::opt<CSPGOKind> CSPGOKindFlag(
+ "cspgo-kind", cl::init(NoCSPGO), cl::Hidden,
+ cl::desc("The kind of context sensitive profile guided optimization"),
+ cl::values(
+ clEnumValN(NoCSPGO, "nocspgo", "Do not use CSPGO."),
+ clEnumValN(
+ CSInstrGen, "cspgo-instr-gen-pipeline",
+ "Instrument (context sensitive) the IR to generate profile."),
+ clEnumValN(
+ CSInstrUse, "cspgo-instr-use-pipeline",
+ "Use instrumented (context sensitive) profile to guide PGO.")));
+cl::opt<std::string> CSProfileGenFile(
+ "cs-profilegen-file",
+ cl::desc("Path to the instrumented context sensitive profile."),
+ cl::Hidden);
+
+class OptCustomPassManager : public legacy::PassManager {
+ DebugifyStatsMap DIStatsMap;
+
+public:
+ using super = legacy::PassManager;
+
+ void add(Pass *P) override {
+ // Wrap each pass with (-check)-debugify passes if requested, making
+ // exceptions for passes which shouldn't see -debugify instrumentation.
+ bool WrapWithDebugify = DebugifyEach && !P->getAsImmutablePass() &&
+ !isIRPrintingPass(P) && !isBitcodeWriterPass(P);
+ if (!WrapWithDebugify) {
+ super::add(P);
+ return;
+ }
+
+ // Apply -debugify/-check-debugify before/after each pass and collect
+ // debug info loss statistics.
+ PassKind Kind = P->getPassKind();
+ StringRef Name = P->getPassName();
+
+ // TODO: Implement Debugify for BasicBlockPass, LoopPass.
+ switch (Kind) {
+ case PT_Function:
+ super::add(createDebugifyFunctionPass());
+ super::add(P);
+ super::add(createCheckDebugifyFunctionPass(true, Name, &DIStatsMap));
+ break;
+ case PT_Module:
+ super::add(createDebugifyModulePass());
+ super::add(P);
+ super::add(createCheckDebugifyModulePass(true, Name, &DIStatsMap));
+ break;
+ default:
+ super::add(P);
+ break;
+ }
+ }
+
+ const DebugifyStatsMap &getDebugifyStatsMap() const { return DIStatsMap; }
+};
+
+static inline void addPass(legacy::PassManagerBase &PM, Pass *P) {
+ // Add the pass to the pass manager...
+ PM.add(P);
+
+ // If we are verifying all of the intermediate steps, add the verifier...
+ if (VerifyEach)
+ PM.add(createVerifierPass());
+}
+
+/// This routine adds optimization passes based on selected optimization level,
+/// OptLevel.
+///
+/// OptLevel - Optimization Level
+static void AddOptimizationPasses(legacy::PassManagerBase &MPM,
+ legacy::FunctionPassManager &FPM,
+ TargetMachine *TM, unsigned OptLevel,
+ unsigned SizeLevel) {
+ if (!NoVerify || VerifyEach)
+ FPM.add(createVerifierPass()); // Verify that input is correct
+
+ PassManagerBuilder Builder;
+ Builder.OptLevel = OptLevel;
+ Builder.SizeLevel = SizeLevel;
+
+ if (DisableInline) {
+ // No inlining pass
+ } else if (OptLevel > 1) {
+ Builder.Inliner = createFunctionInliningPass(OptLevel, SizeLevel, false);
+ } else {
+ Builder.Inliner = createAlwaysInlinerLegacyPass();
+ }
+ Builder.DisableUnrollLoops = (DisableLoopUnrolling.getNumOccurrences() > 0) ?
+ DisableLoopUnrolling : OptLevel == 0;
+
+ // Check if vectorization is explicitly disabled via -vectorize-loops=false.
+ // The flag enables vectorization in the LoopVectorize pass, it is on by
+ // default, and if it was disabled, leave it disabled here.
+ // Another flag that exists: -loop-vectorize, controls adding the pass to the
+ // pass manager. If set, the pass is added, and there is no additional check
+ // here for it.
+ if (Builder.LoopVectorize)
+ Builder.LoopVectorize = OptLevel > 1 && SizeLevel < 2;
+
+ // When #pragma vectorize is on for SLP, do the same as above
+ Builder.SLPVectorize =
+ DisableSLPVectorization ? false : OptLevel > 1 && SizeLevel < 2;
+
+ if (TM)
+ TM->adjustPassManager(Builder);
+
+ if (Coroutines)
+ addCoroutinePassesToExtensionPoints(Builder);
+
+ switch (PGOKindFlag) {
+ case InstrGen:
+ Builder.EnablePGOInstrGen = true;
+ Builder.PGOInstrGen = ProfileFile;
+ break;
+ case InstrUse:
+ Builder.PGOInstrUse = ProfileFile;
+ break;
+ case SampleUse:
+ Builder.PGOSampleUse = ProfileFile;
+ break;
+ default:
+ break;
+ }
+
+ switch (CSPGOKindFlag) {
+ case CSInstrGen:
+ Builder.EnablePGOCSInstrGen = true;
+ break;
+ case CSInstrUse:
+ Builder.EnablePGOCSInstrUse = true;
+ break;
+ default:
+ break;
+ }
+
+ Builder.populateFunctionPassManager(FPM);
+ Builder.populateModulePassManager(MPM);
+}
+
+static void AddStandardLinkPasses(legacy::PassManagerBase &PM) {
+ PassManagerBuilder Builder;
+ Builder.VerifyInput = true;
+ if (DisableOptimizations)
+ Builder.OptLevel = 0;
+
+ if (!DisableInline)
+ Builder.Inliner = createFunctionInliningPass();
+ Builder.populateLTOPassManager(PM);
+}
+
+//===----------------------------------------------------------------------===//
+// CodeGen-related helper functions.
+//
+
+static CodeGenOpt::Level GetCodeGenOptLevel() {
+ if (CodeGenOptLevel.getNumOccurrences())
+ return static_cast<CodeGenOpt::Level>(unsigned(CodeGenOptLevel));
+ if (OptLevelO1)
+ return CodeGenOpt::Less;
+ if (OptLevelO2)
+ return CodeGenOpt::Default;
+ if (OptLevelO3)
+ return CodeGenOpt::Aggressive;
+ return CodeGenOpt::None;
+}
+
+// Returns the TargetMachine instance or zero if no triple is provided.
+static TargetMachine* GetTargetMachine(Triple TheTriple, StringRef CPUStr,
+ StringRef FeaturesStr,
+ const TargetOptions &Options) {
+ std::string Error;
+ const Target *TheTarget = TargetRegistry::lookupTarget(MArch, TheTriple,
+ Error);
+ // Some modules don't specify a triple, and this is okay.
+ if (!TheTarget) {
+ return nullptr;
+ }
+
+ return TheTarget->createTargetMachine(TheTriple.getTriple(), CPUStr,
+ FeaturesStr, Options, getRelocModel(),
+ getCodeModel(), GetCodeGenOptLevel());
+}
+
+#ifdef LINK_POLLY_INTO_TOOLS
+namespace polly {
+void initializePollyPasses(llvm::PassRegistry &Registry);
+}
+#endif
+
+//===----------------------------------------------------------------------===//
+// main for opt
+//
+int main(int argc, char **argv) {
+ InitLLVM X(argc, argv);
+
+ // Enable debug stream buffering.
+ EnableDebugBuffering = true;
+
+ LLVMContext Context;
+
+ InitializeAllTargets();
+ InitializeAllTargetMCs();
+ InitializeAllAsmPrinters();
+ InitializeAllAsmParsers();
+
+ // Initialize passes
+ PassRegistry &Registry = *PassRegistry::getPassRegistry();
+ initializeCore(Registry);
+ initializeCoroutines(Registry);
+ initializeScalarOpts(Registry);
+ initializeObjCARCOpts(Registry);
+ initializeVectorization(Registry);
+ initializeIPO(Registry);
+ initializeAnalysis(Registry);
+ initializeTransformUtils(Registry);
+ initializeInstCombine(Registry);
+ initializeAggressiveInstCombine(Registry);
+ initializeInstrumentation(Registry);
+ initializeTarget(Registry);
+ // For codegen passes, only passes that do IR to IR transformation are
+ // supported.
+ initializeExpandMemCmpPassPass(Registry);
+ initializeScalarizeMaskedMemIntrinPass(Registry);
+ initializeCodeGenPreparePass(Registry);
+ initializeAtomicExpandPass(Registry);
+ initializeRewriteSymbolsLegacyPassPass(Registry);
+ initializeWinEHPreparePass(Registry);
+ initializeDwarfEHPreparePass(Registry);
+ initializeSafeStackLegacyPassPass(Registry);
+ initializeSjLjEHPreparePass(Registry);
+ initializePreISelIntrinsicLoweringLegacyPassPass(Registry);
+ initializeGlobalMergePass(Registry);
+ initializeIndirectBrExpandPassPass(Registry);
+ initializeInterleavedLoadCombinePass(Registry);
+ initializeInterleavedAccessPass(Registry);
+ initializeEntryExitInstrumenterPass(Registry);
+ initializePostInlineEntryExitInstrumenterPass(Registry);
+ initializeUnreachableBlockElimLegacyPassPass(Registry);
+ initializeExpandReductionsPass(Registry);
+ initializeWasmEHPreparePass(Registry);
+ initializeWriteBitcodePassPass(Registry);
+ initializeHardwareLoopsPass(Registry);
+
+#ifdef LINK_POLLY_INTO_TOOLS
+ polly::initializePollyPasses(Registry);
+#endif
+
+ cl::ParseCommandLineOptions(argc, argv,
+ "llvm .bc -> .bc modular optimizer and analysis printer\n");
+
+ if (AnalyzeOnly && NoOutput) {
+ errs() << argv[0] << ": analyze mode conflicts with no-output mode.\n";
+ return 1;
+ }
+
+ SMDiagnostic Err;
+
+ Context.setDiscardValueNames(DiscardValueNames);
+ if (!DisableDITypeMap)
+ Context.enableDebugTypeODRUniquing();
+
+ Expected<std::unique_ptr<ToolOutputFile>> RemarksFileOrErr =
+ setupOptimizationRemarks(Context, RemarksFilename, RemarksPasses,
+ RemarksFormat, RemarksWithHotness,
+ RemarksHotnessThreshold);
+ if (Error E = RemarksFileOrErr.takeError()) {
+ errs() << toString(std::move(E)) << '\n';
+ return 1;
+ }
+ std::unique_ptr<ToolOutputFile> RemarksFile = std::move(*RemarksFileOrErr);
+
+ // Load the input module...
+ std::unique_ptr<Module> M =
+ parseIRFile(InputFilename, Err, Context, !NoVerify, ClDataLayout);
+
+ if (!M) {
+ Err.print(argv[0], errs());
+ return 1;
+ }
+
+ // Strip debug info before running the verifier.
+ if (StripDebug)
+ StripDebugInfo(*M);
+
+ // Erase module-level named metadata, if requested.
+ if (StripNamedMetadata) {
+ while (!M->named_metadata_empty()) {
+ NamedMDNode *NMD = &*M->named_metadata_begin();
+ M->eraseNamedMetadata(NMD);
+ }
+ }
+
+ // If we are supposed to override the target triple or data layout, do so now.
+ if (!TargetTriple.empty())
+ M->setTargetTriple(Triple::normalize(TargetTriple));
+
+ // Immediately run the verifier to catch any problems before starting up the
+ // pass pipelines. Otherwise we can crash on broken code during
+ // doInitialization().
+ if (!NoVerify && verifyModule(*M, &errs())) {
+ errs() << argv[0] << ": " << InputFilename
+ << ": error: input module is broken!\n";
+ return 1;
+ }
+
+ // Figure out what stream we are supposed to write to...
+ std::unique_ptr<ToolOutputFile> Out;
+ std::unique_ptr<ToolOutputFile> ThinLinkOut;
+ if (NoOutput) {
+ if (!OutputFilename.empty())
+ errs() << "WARNING: The -o (output filename) option is ignored when\n"
+ "the --disable-output option is used.\n";
+ } else {
+ // Default to standard output.
+ if (OutputFilename.empty())
+ OutputFilename = "-";
+
+ std::error_code EC;
+ sys::fs::OpenFlags Flags = OutputAssembly ? sys::fs::OF_Text
+ : sys::fs::OF_None;
+ Out.reset(new ToolOutputFile(OutputFilename, EC, Flags));
+ if (EC) {
+ errs() << EC.message() << '\n';
+ return 1;
+ }
+
+ if (!ThinLinkBitcodeFile.empty()) {
+ ThinLinkOut.reset(
+ new ToolOutputFile(ThinLinkBitcodeFile, EC, sys::fs::OF_None));
+ if (EC) {
+ errs() << EC.message() << '\n';
+ return 1;
+ }
+ }
+ }
+
+ Triple ModuleTriple(M->getTargetTriple());
+ std::string CPUStr, FeaturesStr;
+ TargetMachine *Machine = nullptr;
+ const TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
+
+ if (ModuleTriple.getArch()) {
+ CPUStr = getCPUStr();
+ FeaturesStr = getFeaturesStr();
+ Machine = GetTargetMachine(ModuleTriple, CPUStr, FeaturesStr, Options);
+ } else if (ModuleTriple.getArchName() != "unknown" &&
+ ModuleTriple.getArchName() != "") {
+ errs() << argv[0] << ": unrecognized architecture '"
+ << ModuleTriple.getArchName() << "' provided.\n";
+ return 1;
+ }
+
+ std::unique_ptr<TargetMachine> TM(Machine);
+
+ // Override function attributes based on CPUStr, FeaturesStr, and command line
+ // flags.
+ setFunctionAttributes(CPUStr, FeaturesStr, *M);
+
+ // If the output is set to be emitted to standard out, and standard out is a
+ // console, print out a warning message and refuse to do it. We don't
+ // impress anyone by spewing tons of binary goo to a terminal.
+ if (!Force && !NoOutput && !AnalyzeOnly && !OutputAssembly)
+ if (CheckBitcodeOutputToConsole(Out->os(), !Quiet))
+ NoOutput = true;
+
+ if (OutputThinLTOBC)
+ M->addModuleFlag(Module::Error, "EnableSplitLTOUnit", SplitLTOUnit);
+
+ if (PassPipeline.getNumOccurrences() > 0) {
+ OutputKind OK = OK_NoOutput;
+ if (!NoOutput)
+ OK = OutputAssembly
+ ? OK_OutputAssembly
+ : (OutputThinLTOBC ? OK_OutputThinLTOBitcode : OK_OutputBitcode);
+
+ VerifierKind VK = VK_VerifyInAndOut;
+ if (NoVerify)
+ VK = VK_NoVerifier;
+ else if (VerifyEach)
+ VK = VK_VerifyEachPass;
+
+ // The user has asked to use the new pass manager and provided a pipeline
+ // string. Hand off the rest of the functionality to the new code for that
+ // layer.
+ return runPassPipeline(argv[0], *M, TM.get(), Out.get(), ThinLinkOut.get(),
+ RemarksFile.get(), PassPipeline, OK, VK,
+ PreserveAssemblyUseListOrder,
+ PreserveBitcodeUseListOrder, EmitSummaryIndex,
+ EmitModuleHash, EnableDebugify)
+ ? 0
+ : 1;
+ }
+
+ // Create a PassManager to hold and optimize the collection of passes we are
+ // about to build.
+ OptCustomPassManager Passes;
+ bool AddOneTimeDebugifyPasses = EnableDebugify && !DebugifyEach;
+
+ // Add an appropriate TargetLibraryInfo pass for the module's triple.
+ TargetLibraryInfoImpl TLII(ModuleTriple);
+
+ // The -disable-simplify-libcalls flag actually disables all builtin optzns.
+ if (DisableSimplifyLibCalls)
+ TLII.disableAllFunctions();
+ Passes.add(new TargetLibraryInfoWrapperPass(TLII));
+
+ // Add internal analysis passes from the target machine.
+ Passes.add(createTargetTransformInfoWrapperPass(TM ? TM->getTargetIRAnalysis()
+ : TargetIRAnalysis()));
+
+ if (AddOneTimeDebugifyPasses)
+ Passes.add(createDebugifyModulePass());
+
+ std::unique_ptr<legacy::FunctionPassManager> FPasses;
+ if (OptLevelO0 || OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz ||
+ OptLevelO3) {
+ FPasses.reset(new legacy::FunctionPassManager(M.get()));
+ FPasses->add(createTargetTransformInfoWrapperPass(
+ TM ? TM->getTargetIRAnalysis() : TargetIRAnalysis()));
+ }
+
+ if (PrintBreakpoints) {
+ // Default to standard output.
+ if (!Out) {
+ if (OutputFilename.empty())
+ OutputFilename = "-";
+
+ std::error_code EC;
+ Out = std::make_unique<ToolOutputFile>(OutputFilename, EC,
+ sys::fs::OF_None);
+ if (EC) {
+ errs() << EC.message() << '\n';
+ return 1;
+ }
+ }
+ Passes.add(createBreakpointPrinter(Out->os()));
+ NoOutput = true;
+ }
+
+ if (TM) {
+ // FIXME: We should dyn_cast this when supported.
+ auto &LTM = static_cast<LLVMTargetMachine &>(*TM);
+ Pass *TPC = LTM.createPassConfig(Passes);
+ Passes.add(TPC);
+ }
+
+ // Create a new optimization pass for each one specified on the command line
+ for (unsigned i = 0; i < PassList.size(); ++i) {
+ if (StandardLinkOpts &&
+ StandardLinkOpts.getPosition() < PassList.getPosition(i)) {
+ AddStandardLinkPasses(Passes);
+ StandardLinkOpts = false;
+ }
+
+ if (OptLevelO0 && OptLevelO0.getPosition() < PassList.getPosition(i)) {
+ AddOptimizationPasses(Passes, *FPasses, TM.get(), 0, 0);
+ OptLevelO0 = false;
+ }
+
+ if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) {
+ AddOptimizationPasses(Passes, *FPasses, TM.get(), 1, 0);
+ OptLevelO1 = false;
+ }
+
+ if (OptLevelO2 && OptLevelO2.getPosition() < PassList.getPosition(i)) {
+ AddOptimizationPasses(Passes, *FPasses, TM.get(), 2, 0);
+ OptLevelO2 = false;
+ }
+
+ if (OptLevelOs && OptLevelOs.getPosition() < PassList.getPosition(i)) {
+ AddOptimizationPasses(Passes, *FPasses, TM.get(), 2, 1);
+ OptLevelOs = false;
+ }
+
+ if (OptLevelOz && OptLevelOz.getPosition() < PassList.getPosition(i)) {
+ AddOptimizationPasses(Passes, *FPasses, TM.get(), 2, 2);
+ OptLevelOz = false;
+ }
+
+ if (OptLevelO3 && OptLevelO3.getPosition() < PassList.getPosition(i)) {
+ AddOptimizationPasses(Passes, *FPasses, TM.get(), 3, 0);
+ OptLevelO3 = false;
+ }
+
+ const PassInfo *PassInf = PassList[i];
+ Pass *P = nullptr;
+ if (PassInf->getNormalCtor())
+ P = PassInf->getNormalCtor()();
+ else
+ errs() << argv[0] << ": cannot create pass: "
+ << PassInf->getPassName() << "\n";
+ if (P) {
+ PassKind Kind = P->getPassKind();
+ addPass(Passes, P);
+
+ if (AnalyzeOnly) {
+ switch (Kind) {
+ case PT_BasicBlock:
+ Passes.add(createBasicBlockPassPrinter(PassInf, Out->os(), Quiet));
+ break;
+ case PT_Region:
+ Passes.add(createRegionPassPrinter(PassInf, Out->os(), Quiet));
+ break;
+ case PT_Loop:
+ Passes.add(createLoopPassPrinter(PassInf, Out->os(), Quiet));
+ break;
+ case PT_Function:
+ Passes.add(createFunctionPassPrinter(PassInf, Out->os(), Quiet));
+ break;
+ case PT_CallGraphSCC:
+ Passes.add(createCallGraphPassPrinter(PassInf, Out->os(), Quiet));
+ break;
+ default:
+ Passes.add(createModulePassPrinter(PassInf, Out->os(), Quiet));
+ break;
+ }
+ }
+ }
+
+ if (PrintEachXForm)
+ Passes.add(
+ createPrintModulePass(errs(), "", PreserveAssemblyUseListOrder));
+ }
+
+ if (StandardLinkOpts) {
+ AddStandardLinkPasses(Passes);
+ StandardLinkOpts = false;
+ }
+
+ if (OptLevelO0)
+ AddOptimizationPasses(Passes, *FPasses, TM.get(), 0, 0);
+
+ if (OptLevelO1)
+ AddOptimizationPasses(Passes, *FPasses, TM.get(), 1, 0);
+
+ if (OptLevelO2)
+ AddOptimizationPasses(Passes, *FPasses, TM.get(), 2, 0);
+
+ if (OptLevelOs)
+ AddOptimizationPasses(Passes, *FPasses, TM.get(), 2, 1);
+
+ if (OptLevelOz)
+ AddOptimizationPasses(Passes, *FPasses, TM.get(), 2, 2);
+
+ if (OptLevelO3)
+ AddOptimizationPasses(Passes, *FPasses, TM.get(), 3, 0);
+
+ if (FPasses) {
+ FPasses->doInitialization();
+ for (Function &F : *M)
+ FPasses->run(F);
+ FPasses->doFinalization();
+ }
+
+ // Check that the module is well formed on completion of optimization
+ if (!NoVerify && !VerifyEach)
+ Passes.add(createVerifierPass());
+
+ if (AddOneTimeDebugifyPasses)
+ Passes.add(createCheckDebugifyModulePass(false));
+
+ // In run twice mode, we want to make sure the output is bit-by-bit
+ // equivalent if we run the pass manager again, so setup two buffers and
+ // a stream to write to them. Note that llc does something similar and it
+ // may be worth to abstract this out in the future.
+ SmallVector<char, 0> Buffer;
+ SmallVector<char, 0> FirstRunBuffer;
+ std::unique_ptr<raw_svector_ostream> BOS;
+ raw_ostream *OS = nullptr;
+
+ // Write bitcode or assembly to the output as the last step...
+ if (!NoOutput && !AnalyzeOnly) {
+ assert(Out);
+ OS = &Out->os();
+ if (RunTwice) {
+ BOS = std::make_unique<raw_svector_ostream>(Buffer);
+ OS = BOS.get();
+ }
+ if (OutputAssembly) {
+ if (EmitSummaryIndex)
+ report_fatal_error("Text output is incompatible with -module-summary");
+ if (EmitModuleHash)
+ report_fatal_error("Text output is incompatible with -module-hash");
+ Passes.add(createPrintModulePass(*OS, "", PreserveAssemblyUseListOrder));
+ } else if (OutputThinLTOBC)
+ Passes.add(createWriteThinLTOBitcodePass(
+ *OS, ThinLinkOut ? &ThinLinkOut->os() : nullptr));
+ else
+ Passes.add(createBitcodeWriterPass(*OS, PreserveBitcodeUseListOrder,
+ EmitSummaryIndex, EmitModuleHash));
+ }
+
+ // Before executing passes, print the final values of the LLVM options.
+ cl::PrintOptionValues();
+
+ if (!RunTwice) {
+ // Now that we have all of the passes ready, run them.
+ Passes.run(*M);
+ } else {
+ // If requested, run all passes twice with the same pass manager to catch
+ // bugs caused by persistent state in the passes.
+ std::unique_ptr<Module> M2(CloneModule(*M));
+ // Run all passes on the original module first, so the second run processes
+ // the clone to catch CloneModule bugs.
+ Passes.run(*M);
+ FirstRunBuffer = Buffer;
+ Buffer.clear();
+
+ Passes.run(*M2);
+
+ // Compare the two outputs and make sure they're the same
+ assert(Out);
+ if (Buffer.size() != FirstRunBuffer.size() ||
+ (memcmp(Buffer.data(), FirstRunBuffer.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() << BOS->str();
+ Out->keep();
+ if (RemarksFile)
+ RemarksFile->keep();
+ return 1;
+ }
+ Out->os() << BOS->str();
+ }
+
+ if (DebugifyEach && !DebugifyExport.empty())
+ exportDebugifyStats(DebugifyExport, Passes.getDebugifyStatsMap());
+
+ // Declare success.
+ if (!NoOutput || PrintBreakpoints)
+ Out->keep();
+
+ if (RemarksFile)
+ RemarksFile->keep();
+
+ if (ThinLinkOut)
+ ThinLinkOut->keep();
+
+ return 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-11 00:28:02 +0000