//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
+#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/Bytecode/WriteBytecodePass.h"
+#include "llvm/CallGraphSCCPass.h"
+#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Assembly/PrintModulePass.h"
#include "llvm/Analysis/Verifier.h"
+#include "llvm/Analysis/LoopPass.h"
+#include "llvm/Analysis/CallGraph.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Support/PassNameParser.h"
#include "llvm/System/Signals.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/IRReader.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PluginLoader.h"
-#include "llvm/Support/Streams.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/StandardPasses.h"
#include "llvm/Support/SystemUtils.h"
-#include "llvm/Support/Timer.h"
+#include "llvm/Support/raw_ostream.h"
#include "llvm/LinkAllPasses.h"
#include "llvm/LinkAllVMCore.h"
-#include <iostream>
-#include <fstream>
#include <memory>
#include <algorithm>
using namespace llvm;
static cl::list<const PassInfo*, bool, PassNameParser>
PassList(cl::desc("Optimizations available:"));
-static cl::opt<bool> NoCompress("disable-compression", cl::init(false),
- cl::desc("Don't compress the generated bytecode"));
-
// Other command line options...
//
static cl::opt<std::string>
-InputFilename(cl::Positional, cl::desc("<input bytecode file>"),
+InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
cl::init("-"), cl::value_desc("filename"));
static cl::opt<std::string>
cl::value_desc("filename"), cl::init("-"));
static cl::opt<bool>
-Force("f", cl::desc("Overwrite output files"));
+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 bytecode file"), cl::Hidden);
+ 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<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::opt<bool>
AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
-static Timer BytecodeLoadTimer("Bytecode Loader");
+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;
+ CallGraphSCCPassPrinter(const PassInfo *PI) :
+ CallGraphSCCPass(&ID), PassToPrint(PI) {}
+
+ virtual bool runOnSCC(std::vector<CallGraphNode *>&SCC) {
+ if (!Quiet) {
+ outs() << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+
+ for (unsigned i = 0, e = SCC.size(); i != e; ++i) {
+ Function *F = SCC[i]->getFunction();
+ if (F) {
+ getAnalysisID<Pass>(PassToPrint).print(outs(), F->getParent());
+ }
+ }
+ }
+ // Get and print pass...
+ return false;
+ }
+
+ virtual const char *getPassName() const { return "'Pass' Printer"; }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint);
+ AU.setPreservesAll();
+ }
+};
+
+char CallGraphSCCPassPrinter::ID = 0;
+
struct ModulePassPrinter : public ModulePass {
+ static char ID;
const PassInfo *PassToPrint;
- ModulePassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
+ ModulePassPrinter(const PassInfo *PI) : ModulePass(&ID),
+ PassToPrint(PI) {}
virtual bool runOnModule(Module &M) {
if (!Quiet) {
- llvm_cout << "Printing analysis '" << PassToPrint->getPassName()
- << "':\n";
- getAnalysisID<Pass>(PassToPrint).print(llvm_cout, &M);
+ outs() << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+ getAnalysisID<Pass>(PassToPrint).print(outs(), &M);
}
// Get and print pass...
}
};
+char ModulePassPrinter::ID = 0;
struct FunctionPassPrinter : public FunctionPass {
const PassInfo *PassToPrint;
- FunctionPassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
+ static char ID;
+ FunctionPassPrinter(const PassInfo *PI) : FunctionPass(&ID),
+ PassToPrint(PI) {}
virtual bool runOnFunction(Function &F) {
if (!Quiet) {
- llvm_cout << "Printing analysis '" << PassToPrint->getPassName()
- << "' for function '" << F.getName() << "':\n";
+ outs() << "Printing analysis '" << PassToPrint->getPassName()
+ << "' for function '" << F.getName() << "':\n";
}
// Get and print pass...
- getAnalysisID<Pass>(PassToPrint).print(llvm_cout, F.getParent());
+ getAnalysisID<Pass>(PassToPrint).print(outs(), F.getParent());
return false;
}
}
};
+char FunctionPassPrinter::ID = 0;
+
+struct LoopPassPrinter : public LoopPass {
+ static char ID;
+ const PassInfo *PassToPrint;
+ LoopPassPrinter(const PassInfo *PI) :
+ LoopPass(&ID), PassToPrint(PI) {}
+
+ virtual bool runOnLoop(Loop *L, LPPassManager &LPM) {
+ if (!Quiet) {
+ outs() << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+ getAnalysisID<Pass>(PassToPrint).print(outs(),
+ L->getHeader()->getParent()->getParent());
+ }
+ // Get and print pass...
+ return false;
+ }
+
+ virtual const char *getPassName() const { return "'Pass' Printer"; }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint);
+ AU.setPreservesAll();
+ }
+};
+
+char LoopPassPrinter::ID = 0;
+
struct BasicBlockPassPrinter : public BasicBlockPass {
const PassInfo *PassToPrint;
- BasicBlockPassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
+ static char ID;
+ BasicBlockPassPrinter(const PassInfo *PI)
+ : BasicBlockPass(&ID), PassToPrint(PI) {}
virtual bool runOnBasicBlock(BasicBlock &BB) {
if (!Quiet) {
- llvm_cout << "Printing Analysis info for BasicBlock '" << BB.getName()
- << "': Pass " << PassToPrint->getPassName() << ":\n";
+ outs() << "Printing Analysis info for BasicBlock '" << BB.getName()
+ << "': Pass " << PassToPrint->getPassName() << ":\n";
}
// Get and print pass...
- getAnalysisID<Pass>(PassToPrint).print(
- llvm_cout, BB.getParent()->getParent());
+ getAnalysisID<Pass>(PassToPrint).print(outs(), BB.getParent()->getParent());
return false;
}
}
};
+char BasicBlockPassPrinter::ID = 0;
+inline void addPass(PassManager &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
+void AddOptimizationPasses(PassManager &MPM, FunctionPassManager &FPM,
+ unsigned OptLevel) {
+ createStandardFunctionPasses(&FPM, OptLevel);
+
+ llvm::Pass *InliningPass = 0;
+ if (DisableInline) {
+ // No inlining pass
+ } else if (OptLevel) {
+ unsigned Threshold = 200;
+ if (OptLevel > 2)
+ Threshold = 250;
+ InliningPass = createFunctionInliningPass(Threshold);
+ } else {
+ InliningPass = createAlwaysInlinerPass();
+ }
+ createStandardModulePasses(&MPM, OptLevel,
+ /*OptimizeSize=*/ false,
+ UnitAtATime,
+ /*UnrollLoops=*/ OptLevel > 1,
+ !DisableSimplifyLibCalls,
+ /*HaveExceptions=*/ true,
+ InliningPass);
+}
+
+void AddStandardCompilePasses(PassManager &PM) {
+ PM.add(createVerifierPass()); // Verify that input is correct
+
+ addPass(PM, createLowerSetJmpPass()); // Lower llvm.setjmp/.longjmp
+
+ // If the -strip-debug command line option was specified, do it.
+ if (StripDebug)
+ addPass(PM, createStripSymbolsPass(true));
+
+ if (DisableOptimizations) return;
+
+ llvm::Pass *InliningPass = !DisableInline ? createFunctionInliningPass() : 0;
+
+ // -std-compile-opts adds the same module passes as -O3.
+ createStandardModulePasses(&PM, 3,
+ /*OptimizeSize=*/ false,
+ /*UnitAtATime=*/ true,
+ /*UnrollLoops=*/ true,
+ /*SimplifyLibCalls=*/ true,
+ /*HaveExceptions=*/ true,
+ InliningPass);
+}
+
+void AddStandardLinkPasses(PassManager &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;
+
+ createStandardLTOPasses(&PM, /*Internalize=*/ !DisableInternalize,
+ /*RunInliner=*/ !DisableInline,
+ /*VerifyEach=*/ VerifyEach);
+}
+
} // anonymous namespace
// main for opt
//
int main(int argc, char **argv) {
- try {
- cl::ParseCommandLineOptions(argc, argv,
- " llvm .bc -> .bc modular optimizer and analysis printer \n");
- sys::PrintStackTraceOnErrorSignal();
-
- // 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;
-
- std::string ErrorMessage;
-
- // Load the input module...
- std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename, &ErrorMessage));
- if (M.get() == 0) {
- llvm_cerr << argv[0] << ": ";
- if (ErrorMessage.size())
- llvm_cerr << ErrorMessage << "\n";
- else
- llvm_cerr << "bytecode didn't read correctly.\n";
- return 1;
- }
-
- // Figure out what stream we are supposed to write to...
- // FIXME: cout is not binary!
- std::ostream *Out = &std::cout; // Default to printing to stdout...
- if (OutputFilename != "-") {
- if (!Force && std::ifstream(OutputFilename.c_str())) {
- // If force is not specified, make sure not to overwrite a file!
- llvm_cerr << argv[0] << ": error opening '" << OutputFilename
- << "': file exists!\n"
- << "Use -f command line argument to force output\n";
- return 1;
- }
- std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
- std::ios::binary;
- Out = new std::ofstream(OutputFilename.c_str(), io_mode);
-
- if (!Out->good()) {
- llvm_cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
- return 1;
- }
+ 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();
+
+ cl::ParseCommandLineOptions(argc, argv,
+ "llvm .bc -> .bc modular optimizer and analysis printer\n");
+
+ // 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;
+ }
+ // Figure out what stream we are supposed to write to...
+ // FIXME: outs() is not binary!
+ raw_ostream *Out = &outs(); // Default to printing to stdout...
+ if (OutputFilename != "-") {
+ if (NoOutput || AnalyzeOnly) {
+ errs() << "WARNING: The -o (output filename) option is ignored when\n"
+ "the --disable-output or --analyze options are used.\n";
+ } else {
// Make sure that the Output file gets unlinked from the disk if we get a
// SIGINT
sys::RemoveFileOnSignal(sys::Path(OutputFilename));
+
+ std::string ErrorInfo;
+ Out = new raw_fd_ostream(OutputFilename.c_str(), ErrorInfo,
+ raw_fd_ostream::F_Binary);
+ if (!ErrorInfo.empty()) {
+ errs() << ErrorInfo << '\n';
+ delete Out;
+ 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 && CheckBytecodeOutputToConsole(Out,!Quiet)) {
+ // 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, !Quiet))
NoOutput = true;
+
+ // Create a PassManager to hold and optimize the collection of passes we are
+ // about to build...
+ //
+ PassManager Passes;
+
+ // 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);
+
+ FunctionPassManager *FPasses = NULL;
+ if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
+ FPasses = new FunctionPassManager(M.get());
+ if (TD)
+ FPasses->add(new TargetData(*TD));
+ }
+
+ // 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;
}
- // Create a PassManager to hold and optimize the collection of passes we are
- // about to build...
- //
- PassManager Passes;
-
- // Add an appropriate TargetData instance for this module...
- Passes.add(new TargetData(M.get()));
-
- // Create a new optimization pass for each one specified on the command line
- for (unsigned i = 0; i < PassList.size(); ++i) {
- const PassInfo *PassInf = PassList[i];
- Pass *P = 0;
- if (PassInf->getNormalCtor())
- P = PassInf->getNormalCtor()();
- else if (PassInf->getTargetCtor()) {
- assert(target.get() && "Could not allocate target machine!");
- P = PassInf->getTargetCtor()(*target.get());
- } else
- llvm_cerr << argv[0] << ": cannot create pass: "
- << PassInf->getPassName() << "\n";
- if (P) {
- Passes.add(P);
-
- if (AnalyzeOnly) {
- if (dynamic_cast<BasicBlockPass*>(P))
- Passes.add(new BasicBlockPassPrinter(PassInf));
- else if (dynamic_cast<FunctionPass*>(P))
- Passes.add(new FunctionPassPrinter(PassInf));
- else
- Passes.add(new ModulePassPrinter(PassInf));
+ 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) {
+ addPass(Passes, P);
+
+ if (AnalyzeOnly) {
+ switch (P->getPassKind()) {
+ case PT_BasicBlock:
+ Passes.add(new BasicBlockPassPrinter(PassInf));
+ break;
+ case PT_Loop:
+ Passes.add(new LoopPassPrinter(PassInf));
+ break;
+ case PT_Function:
+ Passes.add(new FunctionPassPrinter(PassInf));
+ break;
+ case PT_CallGraphSCC:
+ Passes.add(new CallGraphSCCPassPrinter(PassInf));
+ break;
+ default:
+ Passes.add(new ModulePassPrinter(PassInf));
+ break;
}
}
-
- if (PrintEachXForm)
- Passes.add(new PrintModulePass(&llvm_cerr));
}
- // Check that the module is well formed on completion of optimization
- if (!NoVerify)
- Passes.add(createVerifierPass());
+ 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;
+ }
- // Write bytecode out to disk or cout as the last step...
- llvm_ostream L(*Out);
- if (!NoOutput && !AnalyzeOnly)
- Passes.add(new WriteBytecodePass(&L, false, !NoCompress));
+ if (OptLevelO1)
+ AddOptimizationPasses(Passes, *FPasses, 1);
- // Now that we have all of the passes ready, run them.
- Passes.run(*M.get());
+ if (OptLevelO2)
+ AddOptimizationPasses(Passes, *FPasses, 2);
- return 0;
+ if (OptLevelO3)
+ AddOptimizationPasses(Passes, *FPasses, 3);
- } catch (const std::string& msg) {
- llvm_cerr << argv[0] << ": " << msg << "\n";
- } catch (...) {
- llvm_cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
+ if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
+ FPasses->doInitialization();
+ for (Module::iterator I = M.get()->begin(), E = M.get()->end();
+ I != E; ++I)
+ FPasses->run(*I);
}
- return 1;
+
+ // Check that the module is well formed on completion of optimization
+ if (!NoVerify && !VerifyEach)
+ Passes.add(createVerifierPass());
+
+ // Write bitcode or assembly out to disk or outs() as the last step...
+ if (!NoOutput && !AnalyzeOnly) {
+ if (OutputAssembly)
+ Passes.add(createPrintModulePass(Out));
+ else
+ Passes.add(createBitcodeWriterPass(*Out));
+ }
+
+ // Now that we have all of the passes ready, run them.
+ Passes.run(*M.get());
+
+ // Delete the raw_fd_ostream.
+ if (Out != &outs())
+ delete Out;
+ return 0;
}
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