forked from OSchip/llvm-project
771 lines
25 KiB
C++
771 lines
25 KiB
C++
//===- opt.cpp - The LLVM Modular Optimizer -------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// Optimizations may be specified an arbitrary number of times on the command
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// line, They are run in the order specified.
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//
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//===----------------------------------------------------------------------===//
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#include "BreakpointPrinter.h"
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#include "NewPMDriver.h"
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#include "PassPrinters.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Analysis/CallGraph.h"
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#include "llvm/Analysis/CallGraphSCCPass.h"
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#include "llvm/Analysis/LoopPass.h"
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#include "llvm/Analysis/RegionPass.h"
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#include "llvm/Analysis/TargetLibraryInfo.h"
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#include "llvm/Analysis/TargetTransformInfo.h"
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#include "llvm/Bitcode/BitcodeWriterPass.h"
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#include "llvm/CodeGen/CommandFlags.h"
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#include "llvm/IR/DataLayout.h"
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#include "llvm/IR/DebugInfo.h"
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#include "llvm/IR/IRPrintingPasses.h"
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#include "llvm/IR/LLVMContext.h"
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#include "llvm/IR/LegacyPassManager.h"
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#include "llvm/IR/LegacyPassNameParser.h"
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#include "llvm/IR/Module.h"
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#include "llvm/IR/Verifier.h"
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#include "llvm/IRReader/IRReader.h"
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#include "llvm/InitializePasses.h"
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#include "llvm/LinkAllIR.h"
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#include "llvm/LinkAllPasses.h"
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#include "llvm/MC/SubtargetFeature.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Host.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/PluginLoader.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/SystemUtils.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Support/TargetSelect.h"
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#include "llvm/Support/ToolOutputFile.h"
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#include "llvm/Support/YAMLTraits.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Transforms/Coroutines.h"
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#include "llvm/Transforms/IPO/AlwaysInliner.h"
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#include "llvm/Transforms/IPO/PassManagerBuilder.h"
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#include "llvm/Transforms/Utils/Cloning.h"
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#include <algorithm>
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#include <memory>
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using namespace llvm;
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using namespace opt_tool;
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// The OptimizationList is automatically populated with registered Passes by the
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// PassNameParser.
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//
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static cl::list<const PassInfo*, bool, PassNameParser>
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PassList(cl::desc("Optimizations available:"));
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// This flag specifies a textual description of the optimization pass pipeline
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// to run over the module. This flag switches opt to use the new pass manager
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// infrastructure, completely disabling all of the flags specific to the old
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// pass management.
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static cl::opt<std::string> PassPipeline(
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"passes",
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cl::desc("A textual description of the pass pipeline for optimizing"),
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cl::Hidden);
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// Other command line options...
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//
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static cl::opt<std::string>
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InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
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cl::init("-"), cl::value_desc("filename"));
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static cl::opt<std::string>
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OutputFilename("o", cl::desc("Override output filename"),
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cl::value_desc("filename"));
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static cl::opt<bool>
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Force("f", cl::desc("Enable binary output on terminals"));
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static cl::opt<bool>
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PrintEachXForm("p", cl::desc("Print module after each transformation"));
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static cl::opt<bool>
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NoOutput("disable-output",
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cl::desc("Do not write result bitcode file"), cl::Hidden);
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static cl::opt<bool>
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OutputAssembly("S", cl::desc("Write output as LLVM assembly"));
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static cl::opt<bool>
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OutputThinLTOBC("thinlto-bc",
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cl::desc("Write output as ThinLTO-ready bitcode"));
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static cl::opt<std::string> ThinLinkBitcodeFile(
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"thin-link-bitcode-file", cl::value_desc("filename"),
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cl::desc(
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"A file in which to write minimized bitcode for the thin link only"));
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static cl::opt<bool>
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NoVerify("disable-verify", cl::desc("Do not run the verifier"), cl::Hidden);
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static cl::opt<bool>
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VerifyEach("verify-each", cl::desc("Verify after each transform"));
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static cl::opt<bool>
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DisableDITypeMap("disable-debug-info-type-map",
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cl::desc("Don't use a uniquing type map for debug info"));
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static cl::opt<bool>
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StripDebug("strip-debug",
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cl::desc("Strip debugger symbol info from translation unit"));
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static cl::opt<bool>
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DisableInline("disable-inlining", cl::desc("Do not run the inliner pass"));
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static cl::opt<bool>
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DisableOptimizations("disable-opt",
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cl::desc("Do not run any optimization passes"));
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static cl::opt<bool>
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StandardLinkOpts("std-link-opts",
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cl::desc("Include the standard link time optimizations"));
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static cl::opt<bool>
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OptLevelO0("O0",
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cl::desc("Optimization level 0. Similar to clang -O0"));
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static cl::opt<bool>
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OptLevelO1("O1",
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cl::desc("Optimization level 1. Similar to clang -O1"));
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static cl::opt<bool>
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OptLevelO2("O2",
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cl::desc("Optimization level 2. Similar to clang -O2"));
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static cl::opt<bool>
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OptLevelOs("Os",
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cl::desc("Like -O2 with extra optimizations for size. Similar to clang -Os"));
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static cl::opt<bool>
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OptLevelOz("Oz",
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cl::desc("Like -Os but reduces code size further. Similar to clang -Oz"));
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static cl::opt<bool>
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OptLevelO3("O3",
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cl::desc("Optimization level 3. Similar to clang -O3"));
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static cl::opt<unsigned>
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CodeGenOptLevel("codegen-opt-level",
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cl::desc("Override optimization level for codegen hooks"));
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static cl::opt<std::string>
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TargetTriple("mtriple", cl::desc("Override target triple for module"));
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static cl::opt<bool>
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UnitAtATime("funit-at-a-time",
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cl::desc("Enable IPO. This corresponds to gcc's -funit-at-a-time"),
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cl::init(true));
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static cl::opt<bool>
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DisableLoopUnrolling("disable-loop-unrolling",
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cl::desc("Disable loop unrolling in all relevant passes"),
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cl::init(false));
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static cl::opt<bool>
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DisableLoopVectorization("disable-loop-vectorization",
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cl::desc("Disable the loop vectorization pass"),
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cl::init(false));
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static cl::opt<bool>
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DisableSLPVectorization("disable-slp-vectorization",
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cl::desc("Disable the slp vectorization pass"),
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cl::init(false));
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static cl::opt<bool> EmitSummaryIndex("module-summary",
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cl::desc("Emit module summary index"),
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cl::init(false));
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static cl::opt<bool> EmitModuleHash("module-hash", cl::desc("Emit module hash"),
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cl::init(false));
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static cl::opt<bool>
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DisableSimplifyLibCalls("disable-simplify-libcalls",
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cl::desc("Disable simplify-libcalls"));
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static cl::opt<bool>
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Quiet("q", cl::desc("Obsolete option"), cl::Hidden);
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static cl::alias
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QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
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static cl::opt<bool>
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AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
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static cl::opt<bool>
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PrintBreakpoints("print-breakpoints-for-testing",
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cl::desc("Print select breakpoints location for testing"));
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static cl::opt<std::string> ClDataLayout("data-layout",
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cl::desc("data layout string to use"),
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cl::value_desc("layout-string"),
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cl::init(""));
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static cl::opt<bool> PreserveBitcodeUseListOrder(
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"preserve-bc-uselistorder",
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cl::desc("Preserve use-list order when writing LLVM bitcode."),
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cl::init(true), cl::Hidden);
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static cl::opt<bool> PreserveAssemblyUseListOrder(
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"preserve-ll-uselistorder",
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cl::desc("Preserve use-list order when writing LLVM assembly."),
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cl::init(false), cl::Hidden);
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static cl::opt<bool>
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RunTwice("run-twice",
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cl::desc("Run all passes twice, re-using the same pass manager."),
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cl::init(false), cl::Hidden);
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static cl::opt<bool> DiscardValueNames(
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"discard-value-names",
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cl::desc("Discard names from Value (other than GlobalValue)."),
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cl::init(false), cl::Hidden);
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static cl::opt<bool> Coroutines(
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"enable-coroutines",
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cl::desc("Enable coroutine passes."),
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cl::init(false), cl::Hidden);
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static cl::opt<bool> PassRemarksWithHotness(
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"pass-remarks-with-hotness",
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cl::desc("With PGO, include profile count in optimization remarks"),
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cl::Hidden);
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static cl::opt<std::string>
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RemarksFilename("pass-remarks-output",
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cl::desc("YAML output filename for pass remarks"),
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cl::value_desc("filename"));
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static inline void addPass(legacy::PassManagerBase &PM, Pass *P) {
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// Add the pass to the pass manager...
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PM.add(P);
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// If we are verifying all of the intermediate steps, add the verifier...
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if (VerifyEach)
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PM.add(createVerifierPass());
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}
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/// This routine adds optimization passes based on selected optimization level,
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/// OptLevel.
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///
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/// OptLevel - Optimization Level
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static void AddOptimizationPasses(legacy::PassManagerBase &MPM,
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legacy::FunctionPassManager &FPM,
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TargetMachine *TM, unsigned OptLevel,
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unsigned SizeLevel) {
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if (!NoVerify || VerifyEach)
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FPM.add(createVerifierPass()); // Verify that input is correct
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PassManagerBuilder Builder;
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Builder.OptLevel = OptLevel;
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Builder.SizeLevel = SizeLevel;
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if (DisableInline) {
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// No inlining pass
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} else if (OptLevel > 1) {
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Builder.Inliner = createFunctionInliningPass(OptLevel, SizeLevel, false);
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} else {
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Builder.Inliner = createAlwaysInlinerLegacyPass();
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}
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Builder.DisableUnitAtATime = !UnitAtATime;
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Builder.DisableUnrollLoops = (DisableLoopUnrolling.getNumOccurrences() > 0) ?
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DisableLoopUnrolling : OptLevel == 0;
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// This is final, unless there is a #pragma vectorize enable
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if (DisableLoopVectorization)
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Builder.LoopVectorize = false;
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// If option wasn't forced via cmd line (-vectorize-loops, -loop-vectorize)
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else if (!Builder.LoopVectorize)
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Builder.LoopVectorize = OptLevel > 1 && SizeLevel < 2;
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// When #pragma vectorize is on for SLP, do the same as above
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Builder.SLPVectorize =
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DisableSLPVectorization ? false : OptLevel > 1 && SizeLevel < 2;
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if (TM)
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TM->adjustPassManager(Builder);
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if (Coroutines)
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addCoroutinePassesToExtensionPoints(Builder);
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Builder.populateFunctionPassManager(FPM);
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Builder.populateModulePassManager(MPM);
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}
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static void AddStandardLinkPasses(legacy::PassManagerBase &PM) {
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PassManagerBuilder Builder;
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Builder.VerifyInput = true;
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if (DisableOptimizations)
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Builder.OptLevel = 0;
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if (!DisableInline)
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Builder.Inliner = createFunctionInliningPass();
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Builder.populateLTOPassManager(PM);
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}
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//===----------------------------------------------------------------------===//
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// CodeGen-related helper functions.
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//
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static CodeGenOpt::Level GetCodeGenOptLevel() {
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if (CodeGenOptLevel.getNumOccurrences())
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return static_cast<CodeGenOpt::Level>(unsigned(CodeGenOptLevel));
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if (OptLevelO1)
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return CodeGenOpt::Less;
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if (OptLevelO2)
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return CodeGenOpt::Default;
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if (OptLevelO3)
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return CodeGenOpt::Aggressive;
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return CodeGenOpt::None;
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}
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// Returns the TargetMachine instance or zero if no triple is provided.
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static TargetMachine* GetTargetMachine(Triple TheTriple, StringRef CPUStr,
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StringRef FeaturesStr,
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const TargetOptions &Options) {
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std::string Error;
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const Target *TheTarget = TargetRegistry::lookupTarget(MArch, TheTriple,
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Error);
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// Some modules don't specify a triple, and this is okay.
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if (!TheTarget) {
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return nullptr;
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}
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return TheTarget->createTargetMachine(TheTriple.getTriple(), CPUStr,
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FeaturesStr, Options, getRelocModel(),
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CMModel, GetCodeGenOptLevel());
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}
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#ifdef LINK_POLLY_INTO_TOOLS
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namespace polly {
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void initializePollyPasses(llvm::PassRegistry &Registry);
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}
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#endif
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//===----------------------------------------------------------------------===//
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// main for opt
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//
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int main(int argc, char **argv) {
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sys::PrintStackTraceOnErrorSignal(argv[0]);
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llvm::PrettyStackTraceProgram X(argc, argv);
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// Enable debug stream buffering.
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EnableDebugBuffering = true;
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llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
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LLVMContext Context;
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InitializeAllTargets();
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InitializeAllTargetMCs();
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InitializeAllAsmPrinters();
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InitializeAllAsmParsers();
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// Initialize passes
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PassRegistry &Registry = *PassRegistry::getPassRegistry();
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initializeCore(Registry);
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initializeCoroutines(Registry);
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initializeScalarOpts(Registry);
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initializeObjCARCOpts(Registry);
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initializeVectorization(Registry);
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initializeIPO(Registry);
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initializeAnalysis(Registry);
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initializeTransformUtils(Registry);
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initializeInstCombine(Registry);
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initializeInstrumentation(Registry);
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initializeTarget(Registry);
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// For codegen passes, only passes that do IR to IR transformation are
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// supported.
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initializeCodeGenPreparePass(Registry);
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initializeAtomicExpandPass(Registry);
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initializeRewriteSymbolsLegacyPassPass(Registry);
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initializeWinEHPreparePass(Registry);
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initializeDwarfEHPreparePass(Registry);
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initializeSafeStackLegacyPassPass(Registry);
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initializeSjLjEHPreparePass(Registry);
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initializePreISelIntrinsicLoweringLegacyPassPass(Registry);
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initializeGlobalMergePass(Registry);
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initializeInterleavedAccessPass(Registry);
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initializeCountingFunctionInserterPass(Registry);
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initializeUnreachableBlockElimLegacyPassPass(Registry);
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#ifdef LINK_POLLY_INTO_TOOLS
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polly::initializePollyPasses(Registry);
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#endif
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cl::ParseCommandLineOptions(argc, argv,
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"llvm .bc -> .bc modular optimizer and analysis printer\n");
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if (AnalyzeOnly && NoOutput) {
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errs() << argv[0] << ": analyze mode conflicts with no-output mode.\n";
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return 1;
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}
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SMDiagnostic Err;
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Context.setDiscardValueNames(DiscardValueNames);
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if (!DisableDITypeMap)
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Context.enableDebugTypeODRUniquing();
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if (PassRemarksWithHotness)
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Context.setDiagnosticHotnessRequested(true);
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std::unique_ptr<tool_output_file> YamlFile;
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if (RemarksFilename != "") {
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std::error_code EC;
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YamlFile = llvm::make_unique<tool_output_file>(RemarksFilename, EC,
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sys::fs::F_None);
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if (EC) {
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errs() << EC.message() << '\n';
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return 1;
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}
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Context.setDiagnosticsOutputFile(
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llvm::make_unique<yaml::Output>(YamlFile->os()));
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}
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// Load the input module...
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std::unique_ptr<Module> M = parseIRFile(InputFilename, Err, Context);
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if (!M) {
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Err.print(argv[0], errs());
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return 1;
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}
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// Strip debug info before running the verifier.
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if (StripDebug)
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StripDebugInfo(*M);
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// Immediately run the verifier to catch any problems before starting up the
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// pass pipelines. Otherwise we can crash on broken code during
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// doInitialization().
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if (!NoVerify && verifyModule(*M, &errs())) {
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errs() << argv[0] << ": " << InputFilename
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<< ": error: input module is broken!\n";
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return 1;
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}
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// If we are supposed to override the target triple or data layout, do so now.
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if (!TargetTriple.empty())
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M->setTargetTriple(Triple::normalize(TargetTriple));
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if (!ClDataLayout.empty())
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M->setDataLayout(ClDataLayout);
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// Figure out what stream we are supposed to write to...
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std::unique_ptr<tool_output_file> Out;
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std::unique_ptr<tool_output_file> ThinLinkOut;
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if (NoOutput) {
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if (!OutputFilename.empty())
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errs() << "WARNING: The -o (output filename) option is ignored when\n"
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"the --disable-output option is used.\n";
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} else {
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// Default to standard output.
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if (OutputFilename.empty())
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OutputFilename = "-";
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std::error_code EC;
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Out.reset(new tool_output_file(OutputFilename, EC, sys::fs::F_None));
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if (EC) {
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errs() << EC.message() << '\n';
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return 1;
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}
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if (!ThinLinkBitcodeFile.empty()) {
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ThinLinkOut.reset(
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new tool_output_file(ThinLinkBitcodeFile, EC, sys::fs::F_None));
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if (EC) {
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errs() << EC.message() << '\n';
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return 1;
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}
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}
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}
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Triple ModuleTriple(M->getTargetTriple());
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std::string CPUStr, FeaturesStr;
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TargetMachine *Machine = nullptr;
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const TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
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if (ModuleTriple.getArch()) {
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CPUStr = getCPUStr();
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FeaturesStr = getFeaturesStr();
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Machine = GetTargetMachine(ModuleTriple, CPUStr, FeaturesStr, Options);
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}
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std::unique_ptr<TargetMachine> TM(Machine);
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// Override function attributes based on CPUStr, FeaturesStr, and command line
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// flags.
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setFunctionAttributes(CPUStr, FeaturesStr, *M);
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// If the output is set to be emitted to standard out, and standard out is a
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// console, print out a warning message and refuse to do it. We don't
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// impress anyone by spewing tons of binary goo to a terminal.
|
|
if (!Force && !NoOutput && !AnalyzeOnly && !OutputAssembly)
|
|
if (CheckBitcodeOutputToConsole(Out->os(), !Quiet))
|
|
NoOutput = true;
|
|
|
|
if (PassPipeline.getNumOccurrences() > 0) {
|
|
OutputKind OK = OK_NoOutput;
|
|
if (!NoOutput)
|
|
OK = OutputAssembly ? OK_OutputAssembly : 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(),
|
|
PassPipeline, OK, VK, PreserveAssemblyUseListOrder,
|
|
PreserveBitcodeUseListOrder, EmitSummaryIndex,
|
|
EmitModuleHash)
|
|
? 0
|
|
: 1;
|
|
}
|
|
|
|
// Create a PassManager to hold and optimize the collection of passes we are
|
|
// about to build.
|
|
//
|
|
legacy::PassManager Passes;
|
|
|
|
// 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()));
|
|
|
|
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 = llvm::make_unique<tool_output_file>(OutputFilename, EC,
|
|
sys::fs::F_None);
|
|
if (EC) {
|
|
errs() << EC.message() << '\n';
|
|
return 1;
|
|
}
|
|
}
|
|
Passes.add(createBreakpointPrinter(Out->os()));
|
|
NoOutput = true;
|
|
}
|
|
|
|
// 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->getTargetMachineCtor())
|
|
P = PassInf->getTargetMachineCtor()(TM.get());
|
|
else 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());
|
|
|
|
// 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> CompileTwiceBuffer;
|
|
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 = 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 requested, run all passes again with the same pass manager to catch
|
|
// bugs caused by persistent state in the passes
|
|
if (RunTwice) {
|
|
std::unique_ptr<Module> M2(CloneModule(M.get()));
|
|
Passes.run(*M2);
|
|
CompileTwiceBuffer = Buffer;
|
|
Buffer.clear();
|
|
}
|
|
|
|
// Now that we have all of the passes ready, run them.
|
|
Passes.run(*M);
|
|
|
|
// Compare the two outputs and make sure they're the same
|
|
if (RunTwice) {
|
|
assert(Out);
|
|
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() << BOS->str();
|
|
Out->keep();
|
|
if (YamlFile)
|
|
YamlFile->keep();
|
|
return 1;
|
|
}
|
|
Out->os() << BOS->str();
|
|
}
|
|
|
|
// Declare success.
|
|
if (!NoOutput || PrintBreakpoints)
|
|
Out->keep();
|
|
|
|
if (YamlFile)
|
|
YamlFile->keep();
|
|
|
|
if (ThinLinkOut)
|
|
ThinLinkOut->keep();
|
|
|
|
return 0;
|
|
}
|