//
// 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.
//
//===----------------------------------------------------------------------===//
//
// Optimizations may be specified an arbitrary number of times on the command
-// line, they are run in the order specified.
+// line, They are run in the order specified.
//
//===----------------------------------------------------------------------===//
+#include "llvm/LLVMContext.h"
#include "llvm/Module.h"
+#include "llvm/ModuleProvider.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/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PluginLoader.h"
+#include "llvm/Support/StandardPasses.h"
#include "llvm/Support/SystemUtils.h"
-#include "llvm/Transforms/LinkAllPasses.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/LinkAllPasses.h"
#include "llvm/LinkAllVMCore.h"
-#include <fstream>
#include <memory>
#include <algorithm>
-
using namespace llvm;
// The OptimizationList is automatically populated with registered Passes by the
// PassNameParser.
//
-static cl::list<const PassInfo*, bool,
- FilteredPassNameParser<PassInfo::Optimization> >
-OptimizationList(cl::desc("Optimizations available:"));
-
+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 bytecode>"), cl::init("-"));
+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"),
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>
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>
+StandardCompileOpts("std-compile-opts",
+ cl::desc("Include the standard compile 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"));
+
+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"));
+
+// ---------- 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(const 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) {
+ outs().flush();
+ getAnalysisID<Pass>(PassToPrint).print(cout, F->getParent());
+ cout << std::flush;
+ }
+ }
+ }
+ // 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) : ModulePass(&ID),
+ PassToPrint(PI) {}
+
+ virtual bool runOnModule(Module &M) {
+ if (!Quiet) {
+ outs() << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+ outs().flush();
+ getAnalysisID<Pass>(PassToPrint).print(cout, &M);
+ cout << std::flush;
+ }
+
+ // 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 ModulePassPrinter::ID = 0;
+struct FunctionPassPrinter : public FunctionPass {
+ const PassInfo *PassToPrint;
+ static char ID;
+ FunctionPassPrinter(const PassInfo *PI) : FunctionPass(&ID),
+ PassToPrint(PI) {}
+
+ virtual bool runOnFunction(Function &F) {
+ if (!Quiet) {
+ outs() << "Printing analysis '" << PassToPrint->getPassName()
+ << "' for function '" << F.getName() << "':\n";
+ }
+ // Get and print pass...
+ outs().flush();
+ getAnalysisID<Pass>(PassToPrint).print(cout, F.getParent());
+ cout << std::flush;
+ return false;
+ }
+
+ virtual const char *getPassName() const { return "FunctionPass Printer"; }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint);
+ AU.setPreservesAll();
+ }
+};
+
+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";
+ outs().flush();
+ getAnalysisID<Pass>(PassToPrint).print(cout,
+ L->getHeader()->getParent()->getParent());
+ cout << std::flush;
+ }
+ // 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;
+ static char ID;
+ BasicBlockPassPrinter(const PassInfo *PI)
+ : BasicBlockPass(&ID), PassToPrint(PI) {}
+
+ virtual bool runOnBasicBlock(BasicBlock &BB) {
+ if (!Quiet) {
+ outs() << "Printing Analysis info for BasicBlock '" << BB.getName()
+ << "': Pass " << PassToPrint->getPassName() << ":\n";
+ }
+
+ // Get and print pass...
+ outs().flush();
+ getAnalysisID<Pass>(PassToPrint).print(cout, BB.getParent()->getParent());
+ cout << std::flush;
+ return false;
+ }
+
+ virtual const char *getPassName() const { return "BasicBlockPass Printer"; }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint);
+ AU.setPreservesAll();
+ }
+};
+
+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 = OptLevel > 1 ? createFunctionInliningPass() : 0;
+ 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);
+}
+
+} // anonymous namespace
+
//===----------------------------------------------------------------------===//
// main for opt
//
int main(int argc, char **argv) {
+ llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
+ LLVMContext &Context = getGlobalContext();
try {
cl::ParseCommandLineOptions(argc, argv,
- " llvm .bc -> .bc modular optimizer\n");
+ "llvm .bc -> .bc modular optimizer and analysis printer\n");
sys::PrintStackTraceOnErrorSignal();
- // Allocate a full target machine description only if necessary...
+ // 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;
- TargetMachine* TM = NULL;
std::string ErrorMessage;
// Load the input module...
- std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename, &ErrorMessage));
+ std::auto_ptr<Module> M;
+ if (MemoryBuffer *Buffer
+ = MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
+ M.reset(ParseBitcodeFile(Buffer, Context, &ErrorMessage));
+ delete Buffer;
+ }
+
if (M.get() == 0) {
- std::cerr << argv[0] << ": ";
+ errs() << argv[0] << ": ";
if (ErrorMessage.size())
- std::cerr << ErrorMessage << "\n";
+ errs() << ErrorMessage << "\n";
else
- std::cerr << "bytecode didn't read correctly.\n";
+ errs() << "bitcode 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...
+ // FIXME: outs() is not binary!
+ raw_ostream *Out = &outs(); // 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!
- std::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()) {
- std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
+ std::string ErrorInfo;
+ Out = new raw_fd_ostream(OutputFilename.c_str(), /*Binary=*/true,
+ Force, ErrorInfo);
+ if (!ErrorInfo.empty()) {
+ errs() << ErrorInfo << '\n';
+ if (!Force)
+ errs() << "Use -f command line argument to force output\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 (!Force && !NoOutput && CheckBitcodeOutputToConsole(Out,!Quiet)) {
NoOutput = true;
}
// Add an appropriate TargetData instance for this module...
Passes.add(new TargetData(M.get()));
+ FunctionPassManager *FPasses = NULL;
+ if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
+ FPasses = new FunctionPassManager(new ExistingModuleProvider(M.get()));
+ FPasses->add(new TargetData(M.get()));
+ }
+
+ // 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 < OptimizationList.size(); ++i) {
- const PassInfo *Opt = OptimizationList[i];
-
- if (Opt->getNormalCtor())
- Passes.add(Opt->getNormalCtor()());
- else if (Opt->getTargetCtor()) {
-#if 0
- if (target.get() == NULL)
- target.reset(allocateSparcTargetMachine()); // FIXME: target option
-#endif
- assert(target.get() && "Could not allocate target machine!");
- Passes.add(Opt->getTargetCtor()(*target.get()));
- } else
- std::cerr << argv[0] << ": cannot create pass: " << Opt->getPassName()
- << "\n";
+ 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 (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) {
+ bool isBBPass = dynamic_cast<BasicBlockPass*>(P) != 0;
+ bool isLPass = !isBBPass && dynamic_cast<LoopPass*>(P) != 0;
+ bool isFPass = !isLPass && dynamic_cast<FunctionPass*>(P) != 0;
+ bool isCGSCCPass = !isFPass && dynamic_cast<CallGraphSCCPass*>(P) != 0;
+
+ addPass(Passes, P);
+
+ if (AnalyzeOnly) {
+ if (isBBPass)
+ Passes.add(new BasicBlockPassPrinter(PassInf));
+ else if (isLPass)
+ Passes.add(new LoopPassPrinter(PassInf));
+ else if (isFPass)
+ Passes.add(new FunctionPassPrinter(PassInf));
+ else if (isCGSCCPass)
+ Passes.add(new CallGraphSCCPassPrinter(PassInf));
+ else
+ Passes.add(new ModulePassPrinter(PassInf));
+ }
+ }
+
if (PrintEachXForm)
- Passes.add(new PrintModulePass(&std::cerr));
+ 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 (OptLevelO1) {
+ AddOptimizationPasses(Passes, *FPasses, 1);
+ }
+
+ if (OptLevelO2) {
+ AddOptimizationPasses(Passes, *FPasses, 2);
+ }
+
+ if (OptLevelO3) {
+ AddOptimizationPasses(Passes, *FPasses, 3);
+ }
+
+ if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
+ for (Module::iterator I = M.get()->begin(), E = M.get()->end();
+ I != E; ++I)
+ FPasses->run(*I);
}
// Check that the module is well formed on completion of optimization
- if (!NoVerify)
+ if (!NoVerify && !VerifyEach)
Passes.add(createVerifierPass());
- // Write bytecode out to disk or cout as the last step...
- if (!NoOutput)
- Passes.add(new WriteBytecodePass(Out, Out != &std::cout));
+ // Write bitcode out to disk or outs() as the last step...
+ if (!NoOutput && !AnalyzeOnly)
+ 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;
+
} catch (const std::string& msg) {
- std::cerr << argv[0] << ": " << msg << "\n";
+ errs() << argv[0] << ": " << msg << "\n";
} catch (...) {
- std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
+ errs() << argv[0] << ": Unexpected unknown exception occurred.\n";
}
+ llvm_shutdown();
return 1;
}
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