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+//===- opt.cpp - The LLVM Modular Optimizer -------------------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Optimizations may be specified an arbitrary number of times on the command
+// line, They are run in the order specified.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/LLVMContext.h"
+#include "llvm/Module.h"
+#include "llvm/PassManager.h"
+#include "llvm/CallGraphSCCPass.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/Assembly/PrintModulePass.h"
+#include "llvm/Analysis/DebugInfo.h"
+#include "llvm/Analysis/Verifier.h"
+#include "llvm/Analysis/LoopPass.h"
+#include "llvm/Analysis/RegionPass.h"
+#include "llvm/Analysis/CallGraph.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetLibraryInfo.h"
+#include "llvm/Target/TargetMachine.h"
+#include "llvm/ADT/StringSet.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/Support/PassNameParser.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/IRReader.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/PluginLoader.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/SystemUtils.h"
+#include "llvm/Support/ToolOutputFile.h"
+#include "llvm/LinkAllPasses.h"
+#include "llvm/LinkAllVMCore.h"
+#include "llvm/Transforms/IPO/PassManagerBuilder.h"
+#include <memory>
+#include <algorithm>
+using namespace llvm;
+
+// The OptimizationList is automatically populated with registered Passes by the
+// PassNameParser.
+//
+static cl::list<const PassInfo*, bool, PassNameParser>
+PassList(cl::desc("Optimizations available:"));
+
+// 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>
+NoVerify("disable-verify", cl::desc("Do not verify result module"), cl::Hidden);
+
+static cl::opt<bool>
+VerifyEach("verify-each", cl::desc("Verify after each transform"));
+
+static cl::opt<bool>
+StripDebug("strip-debug",
+ cl::desc("Strip debugger symbol info from translation unit"));
+
+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>
+DisableInternalize("disable-internalize",
+ cl::desc("Do not mark all symbols as internal"));
+
+static cl::opt<bool>
+StandardCompileOpts("std-compile-opts",
+ cl::desc("Include the standard compile time optimizations"));
+
+static cl::opt<bool>
+StandardLinkOpts("std-link-opts",
+ cl::desc("Include the standard link time optimizations"));
+
+static cl::opt<bool>
+OptLevelO1("O1",
+ cl::desc("Optimization level 1. Similar to llvm-gcc -O1"));
+
+static cl::opt<bool>
+OptLevelO2("O2",
+ cl::desc("Optimization level 2. Similar to llvm-gcc -O2"));
+
+static cl::opt<bool>
+OptLevelO3("O3",
+ cl::desc("Optimization level 3. Similar to llvm-gcc -O3"));
+
+static cl::opt<std::string>
+TargetTriple("mtriple", cl::desc("Override target triple for module"));
+
+static cl::opt<bool>
+UnitAtATime("funit-at-a-time",
+ cl::desc("Enable IPO. This is same as llvm-gcc's -funit-at-a-time"),
+ cl::init(true));
+
+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>
+PrintBreakpoints("print-breakpoints-for-testing",
+ cl::desc("Print select breakpoints location for testing"));
+
+static cl::opt<std::string>
+DefaultDataLayout("default-data-layout",
+ cl::desc("data layout string to use if not specified by module"),
+ cl::value_desc("layout-string"), cl::init(""));
+
+// ---------- Define Printers for module and function passes ------------
+namespace {
+
+struct CallGraphSCCPassPrinter : public CallGraphSCCPass {
+ static char ID;
+ const PassInfo *PassToPrint;
+ raw_ostream &Out;
+ std::string PassName;
+
+ CallGraphSCCPassPrinter(const PassInfo *PI, raw_ostream &out) :
+ CallGraphSCCPass(ID), PassToPrint(PI), Out(out) {
+ std::string PassToPrintName = PassToPrint->getPassName();
+ PassName = "CallGraphSCCPass Printer: " + PassToPrintName;
+ }
+
+ virtual bool runOnSCC(CallGraphSCC &SCC) {
+ if (!Quiet)
+ Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+
+ // Get and print pass...
+ for (CallGraphSCC::iterator I = SCC.begin(), E = SCC.end(); I != E; ++I) {
+ Function *F = (*I)->getFunction();
+ if (F)
+ getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
+ F->getParent());
+ }
+ return false;
+ }
+
+ virtual const char *getPassName() const { return PassName.c_str(); }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint->getTypeInfo());
+ AU.setPreservesAll();
+ }
+};
+
+char CallGraphSCCPassPrinter::ID = 0;
+
+struct ModulePassPrinter : public ModulePass {
+ static char ID;
+ const PassInfo *PassToPrint;
+ raw_ostream &Out;
+ std::string PassName;
+
+ ModulePassPrinter(const PassInfo *PI, raw_ostream &out)
+ : ModulePass(ID), PassToPrint(PI), Out(out) {
+ std::string PassToPrintName = PassToPrint->getPassName();
+ PassName = "ModulePass Printer: " + PassToPrintName;
+ }
+
+ virtual bool runOnModule(Module &M) {
+ if (!Quiet)
+ Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+
+ // Get and print pass...
+ getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out, &M);
+ return false;
+ }
+
+ virtual const char *getPassName() const { return PassName.c_str(); }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint->getTypeInfo());
+ AU.setPreservesAll();
+ }
+};
+
+char ModulePassPrinter::ID = 0;
+struct FunctionPassPrinter : public FunctionPass {
+ const PassInfo *PassToPrint;
+ raw_ostream &Out;
+ static char ID;
+ std::string PassName;
+
+ FunctionPassPrinter(const PassInfo *PI, raw_ostream &out)
+ : FunctionPass(ID), PassToPrint(PI), Out(out) {
+ std::string PassToPrintName = PassToPrint->getPassName();
+ PassName = "FunctionPass Printer: " + PassToPrintName;
+ }
+
+ virtual bool runOnFunction(Function &F) {
+ if (!Quiet)
+ Out << "Printing analysis '" << PassToPrint->getPassName()
+ << "' for function '" << F.getName() << "':\n";
+
+ // Get and print pass...
+ getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
+ F.getParent());
+ return false;
+ }
+
+ virtual const char *getPassName() const { return PassName.c_str(); }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint->getTypeInfo());
+ AU.setPreservesAll();
+ }
+};
+
+char FunctionPassPrinter::ID = 0;
+
+struct LoopPassPrinter : public LoopPass {
+ static char ID;
+ const PassInfo *PassToPrint;
+ raw_ostream &Out;
+ std::string PassName;
+
+ LoopPassPrinter(const PassInfo *PI, raw_ostream &out) :
+ LoopPass(ID), PassToPrint(PI), Out(out) {
+ std::string PassToPrintName = PassToPrint->getPassName();
+ PassName = "LoopPass Printer: " + PassToPrintName;
+ }
+
+
+ virtual bool runOnLoop(Loop *L, LPPassManager &LPM) {
+ if (!Quiet)
+ Out << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+
+ // Get and print pass...
+ getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
+ L->getHeader()->getParent()->getParent());
+ return false;
+ }
+
+ virtual const char *getPassName() const { return PassName.c_str(); }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint->getTypeInfo());
+ AU.setPreservesAll();
+ }
+};
+
+char LoopPassPrinter::ID = 0;
+
+struct RegionPassPrinter : public RegionPass {
+ static char ID;
+ const PassInfo *PassToPrint;
+ raw_ostream &Out;
+ std::string PassName;
+
+ RegionPassPrinter(const PassInfo *PI, raw_ostream &out) : RegionPass(ID),
+ PassToPrint(PI), Out(out) {
+ std::string PassToPrintName = PassToPrint->getPassName();
+ PassName = "RegionPass Printer: " + PassToPrintName;
+ }
+
+ virtual bool runOnRegion(Region *R, RGPassManager &RGM) {
+ if (!Quiet) {
+ Out << "Printing analysis '" << PassToPrint->getPassName() << "' for "
+ << "region: '" << R->getNameStr() << "' in function '"
+ << R->getEntry()->getParent()->getName() << "':\n";
+ }
+ // Get and print pass...
+ getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
+ R->getEntry()->getParent()->getParent());
+ return false;
+ }
+
+ virtual const char *getPassName() const { return PassName.c_str(); }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint->getTypeInfo());
+ AU.setPreservesAll();
+ }
+};
+
+char RegionPassPrinter::ID = 0;
+
+struct BasicBlockPassPrinter : public BasicBlockPass {
+ const PassInfo *PassToPrint;
+ raw_ostream &Out;
+ static char ID;
+ std::string PassName;
+
+ BasicBlockPassPrinter(const PassInfo *PI, raw_ostream &out)
+ : BasicBlockPass(ID), PassToPrint(PI), Out(out) {
+ std::string PassToPrintName = PassToPrint->getPassName();
+ PassName = "BasicBlockPass Printer: " + PassToPrintName;
+ }
+
+ virtual bool runOnBasicBlock(BasicBlock &BB) {
+ if (!Quiet)
+ Out << "Printing Analysis info for BasicBlock '" << BB.getName()
+ << "': Pass " << PassToPrint->getPassName() << ":\n";
+
+ // Get and print pass...
+ getAnalysisID<Pass>(PassToPrint->getTypeInfo()).print(Out,
+ BB.getParent()->getParent());
+ return false;
+ }
+
+ virtual const char *getPassName() const { return PassName.c_str(); }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint->getTypeInfo());
+ AU.setPreservesAll();
+ }
+};
+
+char BasicBlockPassPrinter::ID = 0;
+
+struct BreakpointPrinter : public ModulePass {
+ raw_ostream &Out;
+ static char ID;
+
+ BreakpointPrinter(raw_ostream &out)
+ : ModulePass(ID), Out(out) {
+ }
+
+ void getContextName(DIDescriptor Context, std::string &N) {
+ if (Context.isNameSpace()) {
+ DINameSpace NS(Context);
+ if (!NS.getName().empty()) {
+ getContextName(NS.getContext(), N);
+ N = N + NS.getName().str() + "::";
+ }
+ } else if (Context.isType()) {
+ DIType TY(Context);
+ if (!TY.getName().empty()) {
+ getContextName(TY.getContext(), N);
+ N = N + TY.getName().str() + "::";
+ }
+ }
+ }
+
+ virtual bool runOnModule(Module &M) {
+ StringSet<> Processed;
+ if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
+ for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
+ std::string Name;
+ DISubprogram SP(NMD->getOperand(i));
+ if (SP.Verify())
+ getContextName(SP.getContext(), Name);
+ Name = Name + SP.getDisplayName().str();
+ if (!Name.empty() && Processed.insert(Name)) {
+ Out << Name << "\n";
+ }
+ }
+ return false;
+ }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesAll();
+ }
+};
+
+} // anonymous namespace
+
+char BreakpointPrinter::ID = 0;
+
+static inline void addPass(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());
+}
+
+/// AddOptimizationPasses - This routine adds optimization passes
+/// based on selected optimization level, OptLevel. This routine
+/// duplicates llvm-gcc behaviour.
+///
+/// OptLevel - Optimization Level
+static void AddOptimizationPasses(PassManagerBase &MPM,FunctionPassManager &FPM,
+ unsigned OptLevel) {
+ FPM.add(createVerifierPass()); // Verify that input is correct
+
+ PassManagerBuilder Builder;
+ Builder.OptLevel = OptLevel;
+
+ if (DisableInline) {
+ // No inlining pass
+ } else if (OptLevel > 1) {
+ unsigned Threshold = 225;
+ if (OptLevel > 2)
+ Threshold = 275;
+ Builder.Inliner = createFunctionInliningPass(Threshold);
+ } else {
+ Builder.Inliner = createAlwaysInlinerPass();
+ }
+ Builder.DisableUnitAtATime = !UnitAtATime;
+ Builder.DisableUnrollLoops = OptLevel == 0;
+ Builder.DisableSimplifyLibCalls = DisableSimplifyLibCalls;
+
+ Builder.populateFunctionPassManager(FPM);
+ Builder.populateModulePassManager(MPM);
+}
+
+static void AddStandardCompilePasses(PassManagerBase &PM) {
+ PM.add(createVerifierPass()); // Verify that input is correct
+
+ // If the -strip-debug command line option was specified, do it.
+ if (StripDebug)
+ addPass(PM, createStripSymbolsPass(true));
+
+ if (DisableOptimizations) return;
+
+ // -std-compile-opts adds the same module passes as -O3.
+ PassManagerBuilder Builder;
+ if (!DisableInline)
+ Builder.Inliner = createFunctionInliningPass();
+ Builder.OptLevel = 3;
+ Builder.DisableSimplifyLibCalls = DisableSimplifyLibCalls;
+ Builder.populateModulePassManager(PM);
+}
+
+static void AddStandardLinkPasses(PassManagerBase &PM) {
+ PM.add(createVerifierPass()); // Verify that input is correct
+
+ // If the -strip-debug command line option was specified, do it.
+ if (StripDebug)
+ addPass(PM, createStripSymbolsPass(true));
+
+ if (DisableOptimizations) return;
+
+ PassManagerBuilder Builder;
+ Builder.populateLTOPassManager(PM, /*Internalize=*/ !DisableInternalize,
+ /*RunInliner=*/ !DisableInline);
+}
+
+
+//===----------------------------------------------------------------------===//
+// main for opt
+//
+int main(int argc, char **argv) {
+ sys::PrintStackTraceOnErrorSignal();
+ llvm::PrettyStackTraceProgram X(argc, argv);
+
+ // Enable debug stream buffering.
+ EnableDebugBuffering = true;
+
+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+ LLVMContext &Context = getGlobalContext();
+
+ // Initialize passes
+ PassRegistry &Registry = *PassRegistry::getPassRegistry();
+ initializeCore(Registry);
+ initializeScalarOpts(Registry);
+ initializeVectorization(Registry);
+ initializeIPO(Registry);
+ initializeAnalysis(Registry);
+ initializeIPA(Registry);
+ initializeTransformUtils(Registry);
+ initializeInstCombine(Registry);
+ initializeInstrumentation(Registry);
+ initializeTarget(Registry);
+
+ 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;
+ }
+
+ // Allocate a full target machine description only if necessary.
+ // FIXME: The choice of target should be controllable on the command line.
+ std::auto_ptr<TargetMachine> target;
+
+ SMDiagnostic Err;
+
+ // Load the input module...
+ std::auto_ptr<Module> M;
+ M.reset(ParseIRFile(InputFilename, Err, Context));
+
+ if (M.get() == 0) {
+ Err.print(argv[0], errs());
+ return 1;
+ }
+
+ // If we are supposed to override the target triple, do so now.
+ if (!TargetTriple.empty())
+ M->setTargetTriple(Triple::normalize(TargetTriple));
+
+ // Figure out what stream we are supposed to write to...
+ OwningPtr<tool_output_file> Out;
+ 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::string ErrorInfo;
+ Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
+ raw_fd_ostream::F_Binary));
+ if (!ErrorInfo.empty()) {
+ errs() << ErrorInfo << '\n';
+ return 1;
+ }
+ }
+
+ // 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;
+
+ // Create a PassManager to hold and optimize the collection of passes we are
+ // about to build.
+ //
+ PassManager Passes;
+
+ // Add an appropriate TargetLibraryInfo pass for the module's triple.
+ TargetLibraryInfo *TLI = new TargetLibraryInfo(Triple(M->getTargetTriple()));
+
+ // The -disable-simplify-libcalls flag actually disables all builtin optzns.
+ if (DisableSimplifyLibCalls)
+ TLI->disableAllFunctions();
+ Passes.add(TLI);
+
+ // Add an appropriate TargetData instance for this module.
+ TargetData *TD = 0;
+ const std::string &ModuleDataLayout = M.get()->getDataLayout();
+ if (!ModuleDataLayout.empty())
+ TD = new TargetData(ModuleDataLayout);
+ else if (!DefaultDataLayout.empty())
+ TD = new TargetData(DefaultDataLayout);
+
+ if (TD)
+ Passes.add(TD);
+
+ OwningPtr<FunctionPassManager> FPasses;
+ if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
+ FPasses.reset(new FunctionPassManager(M.get()));
+ if (TD)
+ FPasses->add(new TargetData(*TD));
+ }
+
+ if (PrintBreakpoints) {
+ // Default to standard output.
+ if (!Out) {
+ if (OutputFilename.empty())
+ OutputFilename = "-";
+
+ std::string ErrorInfo;
+ Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
+ raw_fd_ostream::F_Binary));
+ if (!ErrorInfo.empty()) {
+ errs() << ErrorInfo << '\n';
+ return 1;
+ }
+ }
+ Passes.add(new BreakpointPrinter(Out->os()));
+ NoOutput = true;
+ }
+
+ // If the -strip-debug command line option was specified, add it. If
+ // -std-compile-opts was also specified, it will handle StripDebug.
+ if (StripDebug && !StandardCompileOpts)
+ addPass(Passes, createStripSymbolsPass(true));
+
+ // Create a new optimization pass for each one specified on the command line
+ for (unsigned i = 0; i < PassList.size(); ++i) {
+ // Check to see if -std-compile-opts was specified before this option. If
+ // so, handle it.
+ if (StandardCompileOpts &&
+ StandardCompileOpts.getPosition() < PassList.getPosition(i)) {
+ AddStandardCompilePasses(Passes);
+ StandardCompileOpts = false;
+ }
+
+ if (StandardLinkOpts &&
+ StandardLinkOpts.getPosition() < PassList.getPosition(i)) {
+ AddStandardLinkPasses(Passes);
+ StandardLinkOpts = false;
+ }
+
+ if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) {
+ AddOptimizationPasses(Passes, *FPasses, 1);
+ OptLevelO1 = false;
+ }
+
+ if (OptLevelO2 && OptLevelO2.getPosition() < PassList.getPosition(i)) {
+ AddOptimizationPasses(Passes, *FPasses, 2);
+ OptLevelO2 = false;
+ }
+
+ if (OptLevelO3 && OptLevelO3.getPosition() < PassList.getPosition(i)) {
+ AddOptimizationPasses(Passes, *FPasses, 3);
+ OptLevelO3 = false;
+ }
+
+ const PassInfo *PassInf = PassList[i];
+ Pass *P = 0;
+ 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(new BasicBlockPassPrinter(PassInf, Out->os()));
+ break;
+ case PT_Region:
+ Passes.add(new RegionPassPrinter(PassInf, Out->os()));
+ break;
+ case PT_Loop:
+ Passes.add(new LoopPassPrinter(PassInf, Out->os()));
+ break;
+ case PT_Function:
+ Passes.add(new FunctionPassPrinter(PassInf, Out->os()));
+ break;
+ case PT_CallGraphSCC:
+ Passes.add(new CallGraphSCCPassPrinter(PassInf, Out->os()));
+ break;
+ default:
+ Passes.add(new ModulePassPrinter(PassInf, Out->os()));
+ break;
+ }
+ }
+ }
+
+ if (PrintEachXForm)
+ Passes.add(createPrintModulePass(&errs()));
+ }
+
+ // If -std-compile-opts was specified at the end of the pass list, add them.
+ if (StandardCompileOpts) {
+ AddStandardCompilePasses(Passes);
+ StandardCompileOpts = false;
+ }
+
+ if (StandardLinkOpts) {
+ AddStandardLinkPasses(Passes);
+ StandardLinkOpts = false;
+ }
+
+ if (OptLevelO1)
+ AddOptimizationPasses(Passes, *FPasses, 1);
+
+ if (OptLevelO2)
+ AddOptimizationPasses(Passes, *FPasses, 2);
+
+ if (OptLevelO3)
+ AddOptimizationPasses(Passes, *FPasses, 3);
+
+ if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
+ FPasses->doInitialization();
+ for (Module::iterator F = M->begin(), E = M->end(); F != E; ++F)
+ FPasses->run(*F);
+ FPasses->doFinalization();
+ }
+
+ // Check that the module is well formed on completion of optimization
+ if (!NoVerify && !VerifyEach)
+ Passes.add(createVerifierPass());
+
+ // Write bitcode or assembly to the output as the last step...
+ if (!NoOutput && !AnalyzeOnly) {
+ if (OutputAssembly)
+ Passes.add(createPrintModulePass(&Out->os()));
+ else
+ Passes.add(createBitcodeWriterPass(Out->os()));
+ }
+
+ // Before executing passes, print the final values of the LLVM options.
+ cl::PrintOptionValues();
+
+ // Now that we have all of the passes ready, run them.
+ Passes.run(*M.get());
+
+ // Declare success.
+ if (!NoOutput || PrintBreakpoints)
+ Out->keep();
+
+ return 0;
+}
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