1 //===- analyze.cpp - The LLVM analyze utility -----------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This utility is designed to print out the results of running various analysis
11 // passes on a program. This is useful for understanding a program, or for
12 // debugging an analysis pass.
14 // analyze --help - Output information about command line switches
15 // analyze --quiet - Do not print analysis name before output
17 //===----------------------------------------------------------------------===//
19 #include "llvm/Module.h"
20 #include "llvm/PassManager.h"
21 #include "llvm/Bytecode/Reader.h"
22 #include "llvm/Assembly/Parser.h"
23 #include "llvm/Analysis/Verifier.h"
24 #include "llvm/Target/TargetData.h"
25 #include "llvm/Support/PassNameParser.h"
26 #include "llvm/System/Signals.h"
27 #include "Support/PluginLoader.h"
28 #include "Support/Timer.h"
33 struct ModulePassPrinter : public Pass {
34 const PassInfo *PassToPrint;
35 ModulePassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
37 virtual bool run(Module &M) {
38 std::cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
39 getAnalysisID<Pass>(PassToPrint).print(std::cout, &M);
41 // Get and print pass...
45 virtual const char *getPassName() const { return "'Pass' Printer"; }
47 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
48 AU.addRequiredID(PassToPrint);
53 struct FunctionPassPrinter : public FunctionPass {
54 const PassInfo *PassToPrint;
55 FunctionPassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
57 virtual bool runOnFunction(Function &F) {
58 std::cout << "Printing analysis '" << PassToPrint->getPassName()
59 << "' for function '" << F.getName() << "':\n";
60 getAnalysisID<Pass>(PassToPrint).print(std::cout, F.getParent());
62 // Get and print pass...
66 virtual const char *getPassName() const { return "FunctionPass Printer"; }
68 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
69 AU.addRequiredID(PassToPrint);
74 struct BasicBlockPassPrinter : public BasicBlockPass {
75 const PassInfo *PassToPrint;
76 BasicBlockPassPrinter(const PassInfo *PI) : PassToPrint(PI) {}
78 virtual bool runOnBasicBlock(BasicBlock &BB) {
79 std::cout << "Printing Analysis info for BasicBlock '" << BB.getName()
80 << "': Pass " << PassToPrint->getPassName() << ":\n";
81 getAnalysisID<Pass>(PassToPrint).print(std::cout, BB.getParent()->getParent());
83 // Get and print pass...
87 virtual const char *getPassName() const { return "BasicBlockPass Printer"; }
89 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
90 AU.addRequiredID(PassToPrint);
99 InputFilename(cl::Positional, cl::desc("<input file>"), cl::init("-"),
100 cl::value_desc("filename"));
102 cl::opt<bool> Quiet("q", cl::desc("Don't print analysis pass names"));
103 cl::alias QuietA("quiet", cl::desc("Alias for -q"),
104 cl::aliasopt(Quiet));
106 cl::opt<bool> NoVerify("disable-verify", cl::Hidden,
107 cl::desc("Do not verify input module"));
109 // The AnalysesList is automatically populated with registered Passes by the
112 cl::list<const PassInfo*, bool, FilteredPassNameParser<PassInfo::Analysis> >
113 AnalysesList(cl::desc("Analyses available:"));
115 Timer BytecodeLoadTimer("Bytecode Loader");
118 int main(int argc, char **argv) {
119 cl::ParseCommandLineOptions(argc, argv, " llvm analysis printer tool\n");
120 sys::PrintStackTraceOnErrorSignal();
125 TimeRegion RegionTimer(BytecodeLoadTimer);
127 CurMod = ParseBytecodeFile(InputFilename);
128 if (!CurMod && !(CurMod = ParseAssemblyFile(InputFilename))){
129 std::cerr << argv[0] << ": input file didn't read correctly.\n";
132 } catch (const ParseException &E) {
133 std::cerr << argv[0] << ": " << E.getMessage() << "\n";
137 // Create a PassManager to hold and optimize the collection of passes we are
142 // Add an appropriate TargetData instance for this module...
143 Passes.add(new TargetData("analyze", CurMod));
145 // Make sure the input LLVM is well formed.
147 Passes.add(createVerifierPass());
149 // Create a new optimization pass for each one specified on the command line
150 for (unsigned i = 0; i < AnalysesList.size(); ++i) {
151 const PassInfo *Analysis = AnalysesList[i];
153 if (Analysis->getNormalCtor()) {
154 Pass *P = Analysis->getNormalCtor()();
157 if (BasicBlockPass *BBP = dynamic_cast<BasicBlockPass*>(P))
158 Passes.add(new BasicBlockPassPrinter(Analysis));
159 else if (FunctionPass *FP = dynamic_cast<FunctionPass*>(P))
160 Passes.add(new FunctionPassPrinter(Analysis));
162 Passes.add(new ModulePassPrinter(Analysis));
165 std::cerr << argv[0] << ": cannot create pass: "
166 << Analysis->getPassName() << "\n";