mirror of
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338 lines
10 KiB
C++
338 lines
10 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/iPHINode.h"
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#include "llvm/Type.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/Assembly/PrintModulePass.h"
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#include "llvm/Assembly/Writer.h"
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#include "llvm/Analysis/Writer.h"
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#include "llvm/Analysis/InstForest.h"
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#include "llvm/Analysis/Dominators.h"
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#include "llvm/Analysis/IntervalPartition.h"
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#include "llvm/Analysis/Expressions.h"
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#include "llvm/Analysis/InductionVariable.h"
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#include "llvm/Analysis/CallGraph.h"
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#include "llvm/Analysis/LoopInfo.h"
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#include "llvm/Analysis/DataStructure.h"
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#include "llvm/Analysis/FindUnsafePointerTypes.h"
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#include "llvm/Analysis/FindUsedTypes.h"
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#include "llvm/Support/InstIterator.h"
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#include "Support/CommandLine.h"
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#include <algorithm>
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using std::ostream;
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using std::string;
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//===----------------------------------------------------------------------===//
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// printPass - Specify how to print out a pass. For most passes, the standard
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// way of using operator<< works great, so we use it directly...
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//
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template<class PassType>
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static void printPass(PassType &P, ostream &O, Module *M) {
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O << P;
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}
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template<class PassType>
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static void printPass(PassType &P, ostream &O, Function *F) {
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O << P;
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}
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// Other classes require more information to print out information, so we
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// specialize the template here for them...
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//
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template<>
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static void printPass(DataStructure &P, ostream &O, Module *M) {
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P.print(O, M);
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}
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template<>
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static void printPass(FindUsedTypes &FUT, ostream &O, Module *M) {
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FUT.printTypes(O, M);
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}
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template<>
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static void printPass(FindUnsafePointerTypes &FUPT, ostream &O,
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Module *M) {
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FUPT.printResults(M, O);
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}
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template <class PassType, class PassName>
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class PassPrinter; // Do not implement
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template <class PassName>
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class PassPrinter<Pass, PassName> : public Pass {
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const string Message;
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const AnalysisID ID;
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public:
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PassPrinter(const string &M, AnalysisID id) : Message(M), ID(id) {}
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const char *getPassName() const { return "IP Pass Printer"; }
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virtual bool run(Module *M) {
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std::cout << Message << "\n";
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printPass(getAnalysis<PassName>(ID), std::cout, M);
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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.addRequired(ID);
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}
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};
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template <class PassName>
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class PassPrinter<FunctionPass, PassName> : public FunctionPass {
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const string Message;
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const AnalysisID ID;
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public:
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PassPrinter(const string &M, AnalysisID id) : Message(M), ID(id) {}
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const char *getPassName() const { return "Function Pass Printer"; }
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virtual bool runOnFunction(Function *F) {
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std::cout << Message << " on function '" << F->getName() << "'\n";
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printPass(getAnalysis<PassName>(ID), std::cout, F);
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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.addRequired(ID);
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AU.setPreservesAll();
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}
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};
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template <class PassType, class PassName, AnalysisID &ID>
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Pass *New(const string &Message) {
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return new PassPrinter<PassType, PassName>(Message, ID);
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}
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template <class PassType, class PassName>
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Pass *New(const string &Message) {
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return new PassPrinter<PassType, PassName>(Message, PassName::ID);
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}
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Pass *createPrintFunctionPass(const string &Message) {
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return new PrintFunctionPass(Message, &std::cout);
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}
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Pass *createPrintModulePass(const string &Message) {
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return new PrintModulePass(&std::cout);
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}
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struct InstForestHelper : public FunctionPass {
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const char *getPassName() const { return "InstForest Printer"; }
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void doit(Function *F) {
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std::cout << InstForest<char>(F);
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}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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};
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struct IndVars : public FunctionPass {
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const char *getPassName() const { return "IndVars Printer"; }
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void doit(Function *F) {
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LoopInfo &LI = getAnalysis<LoopInfo>();
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for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I)
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if (PHINode *PN = dyn_cast<PHINode>(*I)) {
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InductionVariable IV(PN, &LI);
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if (IV.InductionType != InductionVariable::Unknown)
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std::cout << IV;
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}
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}
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void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.addRequired(LoopInfo::ID);
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AU.setPreservesAll();
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}
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};
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struct Exprs : public FunctionPass {
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const char *getPassName() const { return "Expression Printer"; }
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static void doit(Function *F) {
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std::cout << "Classified expressions for: " << F->getName() << "\n";
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for (inst_iterator I = inst_begin(F), E = inst_end(F); I != E; ++I) {
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std::cout << *I;
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if ((*I)->getType() == Type::VoidTy) continue;
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analysis::ExprType R = analysis::ClassifyExpression(*I);
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if (R.Var == *I) continue; // Doesn't tell us anything
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std::cout << "\t\tExpr =";
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switch (R.ExprTy) {
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case analysis::ExprType::ScaledLinear:
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WriteAsOperand(std::cout << "(", (Value*)R.Scale) << " ) *";
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// fall through
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case analysis::ExprType::Linear:
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WriteAsOperand(std::cout << "(", R.Var) << " )";
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if (R.Offset == 0) break;
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else std::cout << " +";
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// fall through
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case analysis::ExprType::Constant:
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if (R.Offset) WriteAsOperand(std::cout, (Value*)R.Offset);
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else std::cout << " 0";
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break;
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}
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std::cout << "\n\n";
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}
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}
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virtual void getAnalysisUsage(AnalysisUsage &AU) const {
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AU.setPreservesAll();
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}
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};
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template<class TraitClass>
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class PrinterPass : public TraitClass {
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const string Message;
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public:
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PrinterPass(const string &M) : Message(M) {}
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virtual bool runOnFunction(Function *F) {
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std::cout << Message << " on function '" << F->getName() << "'\n";
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TraitClass::doit(F);
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return false;
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}
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};
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template<class PassClass>
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Pass *Create(const string &Message) {
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return new PassClass(Message);
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}
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enum Ans {
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// global analyses
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print, intervals, exprs, instforest, loops, indvars,
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// ip analyses
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printmodule, callgraph, datastructure, printusedtypes, unsafepointertypes,
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domset, idom, domtree, domfrontier,
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postdomset, postidom, postdomtree, postdomfrontier,
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};
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cl::String InputFilename ("", "Load <arg> file to analyze", cl::NoFlags, "-");
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cl::Flag Quiet ("q", "Don't print analysis pass names");
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cl::Alias QuietA ("quiet", "Alias for -q", cl::NoFlags, Quiet);
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cl::EnumList<enum Ans> AnalysesList(cl::NoFlags,
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clEnumVal(print , "Print each function"),
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clEnumVal(intervals , "Print Interval Partitions"),
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clEnumVal(exprs , "Classify Expressions"),
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clEnumVal(instforest , "Print Instruction Forest"),
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clEnumVal(loops , "Print natural loops"),
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clEnumVal(indvars , "Print Induction Variables"),
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clEnumVal(printmodule , "Print entire module"),
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clEnumVal(callgraph , "Print Call Graph"),
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clEnumVal(datastructure , "Print data structure information"),
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clEnumVal(printusedtypes , "Print types used by module"),
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clEnumVal(unsafepointertypes, "Print unsafe pointer types"),
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clEnumVal(domset , "Print Dominator Sets"),
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clEnumVal(idom , "Print Immediate Dominators"),
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clEnumVal(domtree , "Print Dominator Tree"),
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clEnumVal(domfrontier , "Print Dominance Frontier"),
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clEnumVal(postdomset , "Print Postdominator Sets"),
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clEnumVal(postidom , "Print Immediate Postdominators"),
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clEnumVal(postdomtree , "Print Post Dominator Tree"),
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clEnumVal(postdomfrontier, "Print Postdominance Frontier"),
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0);
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struct {
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enum Ans AnID;
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Pass *(*PassConstructor)(const string &Message);
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} AnTable[] = {
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// Global analyses
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{ print , createPrintFunctionPass },
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{ intervals , New<FunctionPass, IntervalPartition> },
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{ loops , New<FunctionPass, LoopInfo> },
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{ instforest , Create<PrinterPass<InstForestHelper> > },
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{ indvars , Create<PrinterPass<IndVars> > },
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{ exprs , Create<PrinterPass<Exprs> > },
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// IP Analyses...
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{ printmodule , createPrintModulePass },
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{ printusedtypes , New<Pass, FindUsedTypes> },
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{ callgraph , New<Pass, CallGraph> },
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{ datastructure , New<Pass, DataStructure> },
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{ unsafepointertypes, New<Pass, FindUnsafePointerTypes> },
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// Dominator analyses
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{ domset , New<FunctionPass, DominatorSet> },
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{ idom , New<FunctionPass, ImmediateDominators> },
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{ domtree , New<FunctionPass, DominatorTree> },
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{ domfrontier , New<FunctionPass, DominanceFrontier> },
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{ postdomset , New<FunctionPass, DominatorSet, DominatorSet::PostDomID> },
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{ postidom , New<FunctionPass, ImmediateDominators, ImmediateDominators::PostDomID> },
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{ postdomtree , New<FunctionPass, DominatorTree, DominatorTree::PostDomID> },
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{ postdomfrontier , New<FunctionPass, DominanceFrontier, DominanceFrontier::PostDomID> },
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};
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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 << "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 << 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 Analyses;
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// Loop over all of the analyses looking for analyses to run...
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for (unsigned i = 0; i < AnalysesList.size(); ++i) {
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enum Ans AnalysisPass = AnalysesList[i];
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for (unsigned j = 0; j < sizeof(AnTable)/sizeof(AnTable[0]); ++j) {
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if (AnTable[j].AnID == AnalysisPass) {
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string Message;
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if (!Quiet)
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Message = "\nRunning: '" +
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string(AnalysesList.getArgDescription(AnalysisPass)) + "' analysis";
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Analyses.add(AnTable[j].PassConstructor(Message));
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break; // get an error later
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}
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}
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}
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Analyses.run(CurMod);
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delete CurMod;
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return 0;
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}
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