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