#include "llvm/Module.h"
#include "llvm/ModuleProvider.h"
#include "llvm/PassManager.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/Streams.h"
#include "llvm/Support/SystemUtils.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<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"), cl::init("-"));
static cl::opt<bool>
Force("f", cl::desc("Overwrite output files"));
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>
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"));
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) {
cout << "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(cout, F->getParent());
}
}
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) {
cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
getAnalysisID<Pass>(PassToPrint).print(cout, &M);
}
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) {
cout << "Printing analysis '" << PassToPrint->getPassName()
<< "' for function '" << F.getName() << "':\n";
}
getAnalysisID<Pass>(PassToPrint).print(cout, F.getParent());
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) {
cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
getAnalysisID<Pass>(PassToPrint).print(cout,
L->getHeader()->getParent()->getParent());
}
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) {
cout << "Printing Analysis info for BasicBlock '" << BB.getName()
<< "': Pass " << PassToPrint->getPassName() << ":\n";
}
getAnalysisID<Pass>(PassToPrint).print(cout, BB.getParent()->getParent());
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) {
PM.add(P);
if (VerifyEach) PM.add(createVerifierPass());
}
void AddOptimizationPasses(PassManager &MPM, FunctionPassManager &FPM,
unsigned OptLevel) {
if (OptLevel == 0)
return;
FPM.add(createCFGSimplificationPass());
if (OptLevel == 1)
FPM.add(createPromoteMemoryToRegisterPass());
else
FPM.add(createScalarReplAggregatesPass());
FPM.add(createInstructionCombiningPass());
if (UnitAtATime)
MPM.add(createRaiseAllocationsPass()); MPM.add(createCFGSimplificationPass()); MPM.add(createPromoteMemoryToRegisterPass()); if (UnitAtATime) {
MPM.add(createGlobalOptimizerPass()); MPM.add(createGlobalDCEPass()); MPM.add(createIPConstantPropagationPass()); MPM.add(createDeadArgEliminationPass()); }
MPM.add(createInstructionCombiningPass()); MPM.add(createCFGSimplificationPass()); if (UnitAtATime) {
MPM.add(createPruneEHPass()); MPM.add(createFunctionAttrsPass()); }
if (OptLevel > 1)
MPM.add(createFunctionInliningPass()); if (OptLevel > 2)
MPM.add(createArgumentPromotionPass()); if (!DisableSimplifyLibCalls)
MPM.add(createSimplifyLibCallsPass()); MPM.add(createInstructionCombiningPass()); MPM.add(createJumpThreadingPass()); MPM.add(createCFGSimplificationPass()); MPM.add(createScalarReplAggregatesPass()); MPM.add(createInstructionCombiningPass()); MPM.add(createCondPropagationPass()); MPM.add(createTailCallEliminationPass()); MPM.add(createCFGSimplificationPass()); MPM.add(createReassociatePass()); MPM.add(createLoopRotatePass()); MPM.add(createLICMPass()); MPM.add(createLoopUnswitchPass());
MPM.add(createLoopIndexSplitPass()); MPM.add(createInstructionCombiningPass());
MPM.add(createIndVarSimplifyPass()); MPM.add(createLoopDeletionPass()); if (OptLevel > 1)
MPM.add(createLoopUnrollPass()); MPM.add(createInstructionCombiningPass()); MPM.add(createGVNPass()); MPM.add(createMemCpyOptPass()); MPM.add(createSCCPPass());
MPM.add(createInstructionCombiningPass());
MPM.add(createCondPropagationPass()); MPM.add(createDeadStoreEliminationPass()); MPM.add(createAggressiveDCEPass()); MPM.add(createCFGSimplificationPass());
if (UnitAtATime) {
MPM.add(createStripDeadPrototypesPass()); MPM.add(createDeadTypeEliminationPass()); }
if (OptLevel > 1 && UnitAtATime)
MPM.add(createConstantMergePass());
return;
}
void AddStandardCompilePasses(PassManager &PM) {
PM.add(createVerifierPass());
addPass(PM, createLowerSetJmpPass());
if (StripDebug)
addPass(PM, createStripSymbolsPass(true));
if (DisableOptimizations) return;
addPass(PM, createRaiseAllocationsPass()); addPass(PM, createCFGSimplificationPass()); addPass(PM, createPromoteMemoryToRegisterPass()); addPass(PM, createGlobalOptimizerPass()); addPass(PM, createGlobalDCEPass()); addPass(PM, createIPConstantPropagationPass()); addPass(PM, createDeadArgEliminationPass()); addPass(PM, createInstructionCombiningPass()); addPass(PM, createCFGSimplificationPass());
addPass(PM, createPruneEHPass()); addPass(PM, createFunctionAttrsPass());
if (!DisableInline)
addPass(PM, createFunctionInliningPass()); addPass(PM, createArgumentPromotionPass());
addPass(PM, createSimplifyLibCallsPass()); addPass(PM, createInstructionCombiningPass()); addPass(PM, createJumpThreadingPass()); addPass(PM, createCFGSimplificationPass()); addPass(PM, createScalarReplAggregatesPass()); addPass(PM, createInstructionCombiningPass()); addPass(PM, createCondPropagationPass());
addPass(PM, createTailCallEliminationPass()); addPass(PM, createCFGSimplificationPass()); addPass(PM, createReassociatePass()); addPass(PM, createLoopRotatePass());
addPass(PM, createLICMPass()); addPass(PM, createLoopUnswitchPass()); addPass(PM, createLoopIndexSplitPass()); addPass(PM, createInstructionCombiningPass());
addPass(PM, createIndVarSimplifyPass()); addPass(PM, createLoopDeletionPass()); addPass(PM, createLoopUnrollPass()); addPass(PM, createInstructionCombiningPass()); addPass(PM, createGVNPass()); addPass(PM, createMemCpyOptPass()); addPass(PM, createSCCPPass());
addPass(PM, createInstructionCombiningPass());
addPass(PM, createCondPropagationPass());
addPass(PM, createDeadStoreEliminationPass()); addPass(PM, createAggressiveDCEPass()); addPass(PM, createCFGSimplificationPass()); addPass(PM, createStripDeadPrototypesPass()); addPass(PM, createDeadTypeEliminationPass()); addPass(PM, createConstantMergePass()); }
}
int main(int argc, char **argv) {
llvm_shutdown_obj X; try {
cl::ParseCommandLineOptions(argc, argv,
"llvm .bc -> .bc modular optimizer and analysis printer\n");
sys::PrintStackTraceOnErrorSignal();
std::auto_ptr<TargetMachine> target;
std::string ErrorMessage;
std::auto_ptr<Module> M;
if (MemoryBuffer *Buffer
= MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
M.reset(ParseBitcodeFile(Buffer, &ErrorMessage));
delete Buffer;
}
if (M.get() == 0) {
cerr << argv[0] << ": ";
if (ErrorMessage.size())
cerr << ErrorMessage << "\n";
else
cerr << "bitcode didn't read correctly.\n";
return 1;
}
std::ostream *Out = &std::cout; if (OutputFilename != "-") {
if (!Force && std::ifstream(OutputFilename.c_str())) {
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()) {
cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
return 1;
}
sys::RemoveFileOnSignal(sys::Path(OutputFilename));
}
if (!Force && !NoOutput && CheckBitcodeOutputToConsole(Out,!Quiet)) {
NoOutput = true;
}
PassManager Passes;
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 (StripDebug && !StandardCompileOpts)
addPass(Passes, createStripSymbolsPass(true));
for (unsigned i = 0; i < PassList.size(); ++i) {
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
cerr << 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(createPrintModulePass(&errs()));
}
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);
}
if (!NoVerify && !VerifyEach)
Passes.add(createVerifierPass());
if (!NoOutput && !AnalyzeOnly)
Passes.add(CreateBitcodeWriterPass(*Out));
Passes.run(*M.get());
if (Out != &std::cout)
delete Out;
return 0;
} catch (const std::string& msg) {
cerr << argv[0] << ": " << msg << "\n";
} catch (...) {
cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
}
llvm_shutdown();
return 1;
}