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//===----------------------------------------------------------------------===//
// The LLVM analyze utility
//
// This utility is designed to print out the results of running various analysis
// passes on a program. This is useful for understanding a program, or for
// debugging an analysis pass.
//
// analyze --help - Output information about command line switches
// analyze --quiet - Do not print analysis name before output
//
//===----------------------------------------------------------------------===//
#include "llvm/Module.h"
#include "llvm/PassManager.h"
#include "llvm/Bytecode/Reader.h"
#include "llvm/Assembly/Parser.h"
#include "llvm/Analysis/Verifier.h"
#include "llvm/Support/PassNameParser.h"
#include <algorithm>
struct ModulePassPrinter : public Pass {
const PassInfo *PassToPrint;
ModulePassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
virtual bool run(Module &M) {
std::cout << "Printing Analysis info for Pass "
<< PassToPrint->getPassName() << ":\n";
getAnalysisID<Pass>(PassToPrint).print(std::cout, &M);
// Get and print pass...
return false;
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequiredID(PassToPrint);
AU.setPreservesAll();
}
};
struct FunctionPassPrinter : public FunctionPass {
const PassInfo *PassToPrint;
FunctionPassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
virtual bool runOnFunction(Function &F) {
std::cout << "Printing Analysis info for function '" << F.getName()
<< "': Pass " << PassToPrint->getPassName() << ":\n";
getAnalysisID<Pass>(PassToPrint).print(std::cout, F.getParent());
// Get and print pass...
return false;
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequiredID(PassToPrint);
AU.setPreservesAll();
}
};
struct BasicBlockPassPrinter : public BasicBlockPass {
const PassInfo *PassToPrint;
BasicBlockPassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
virtual bool runOnBasicBlock(BasicBlock &BB) {
std::cout << "Printing Analysis info for BasicBlock '" << BB.getName()
<< "': Pass " << PassToPrint->getPassName() << ":\n";
getAnalysisID<Pass>(PassToPrint).print(std::cout, BB.getParent()->getParent());
// Get and print pass...
return false;
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequiredID(PassToPrint);
AU.setPreservesAll();
}
};
static cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"),
cl::value_desc("filename"));
static cl::opt<bool> Quiet("q", cl::desc("Don't print analysis pass names"));
static cl::alias QuietA("quiet", cl::desc("Alias for -q"),
cl::aliasopt(Quiet));
// The AnalysesList is automatically populated with registered Passes by the
// PassNameParser.
//
static cl::list<const PassInfo*, bool,
FilteredPassNameParser<PassInfo::Analysis> >
AnalysesList(cl::desc("Analyses available:"));
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, " llvm analysis printer tool\n");
Module *CurMod = 0;
try {
CurMod = ParseBytecodeFile(InputFilename);
if (!CurMod && !(CurMod = ParseAssemblyFile(InputFilename))){
std::cerr << argv[0] << ": input file didn't read correctly.\n";
return 1;
}
} catch (const ParseException &E) {
std::cerr << argv[0] << ": " << E.getMessage() << "\n";
return 1;
}
// Create a PassManager to hold and optimize the collection of passes we are
// about to build...
//
PassManager Passes;
// Make sure the input LLVM is well formed.
Passes.add(createVerifierPass());
// Create a new optimization pass for each one specified on the command line
for (unsigned i = 0; i < AnalysesList.size(); ++i) {
const PassInfo *Analysis = AnalysesList[i];
if (Analysis->getNormalCtor()) {
Pass *P = Analysis->getNormalCtor()();
Passes.add(P);
if (BasicBlockPass *BBP = dynamic_cast<BasicBlockPass*>(P))
Passes.add(new BasicBlockPassPrinter(Analysis));
else if (FunctionPass *FP = dynamic_cast<FunctionPass*>(P))
Passes.add(new FunctionPassPrinter(Analysis));
else
Passes.add(new ModulePassPrinter(Analysis));
} else
std::cerr << argv[0] << ": cannot create pass: "
<< Analysis->getPassName() << "\n";
}
Passes.run(*CurMod);
delete CurMod;
return 0;
}
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