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//===------------------------------------------------------------------------===
// 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 <iostream>
#include "llvm/Instruction.h"
#include "llvm/Module.h"
#include "llvm/Method.h"
#include "llvm/Bytecode/Reader.h"
#include "llvm/Assembly/Parser.h"
#include "llvm/Tools/CommandLine.h"
#include "llvm/Analysis/Writer.h"
#include "llvm/Analysis/Dominators.h"
#include "llvm/Analysis/IntervalPartition.h"
#include "llvm/Analysis/Expressions.h"
static void PrintMethod(Method *M) {
cout << M;
}
static void PrintIntervalPartition(Method *M) {
cout << cfg::IntervalPartition(M);
}
static void PrintClassifiedExprs(Method *M) {
cout << "Classified expressions for: " << M->getName() << endl;
Method::inst_iterator I = M->inst_begin(), E = M->inst_end();
for (; I != E; ++I) {
cout << *I;
if ((*I)->getType() == Type::VoidTy) continue;
analysis::ExprType R = analysis::ClassifyExpression(*I);
if (R.Var == *I) continue; // Doesn't tell us anything
cout << "\t\tExpr =";
switch (R.ExprTy) {
case analysis::ExprType::ScaledLinear:
WriteAsOperand(cout, (Value*)R.Scale) << " *";
// fall through
case analysis::ExprType::Linear:
WriteAsOperand(cout, R.Var);
if (R.Offset == 0) break;
else cout << " +";
// fall through
case analysis::ExprType::Constant:
if (R.Offset) WriteAsOperand(cout, (Value*)R.Offset); else cout << " 0";
break;
}
cout << endl << endl;
}
}
static void PrintDominatorSets(Method *M) {
cout << cfg::DominatorSet(M);
}
static void PrintImmediateDominators(Method *M) {
cout << cfg::ImmediateDominators(M);
}
static void PrintDominatorTree(Method *M) {
cout << cfg::DominatorTree(M);
}
static void PrintDominanceFrontier(Method *M) {
cout << cfg::DominanceFrontier(M);
}
static void PrintPostDominatorSets(Method *M) {
cout << cfg::DominatorSet(M, true);
}
static void PrintImmediatePostDoms(Method *M) {
cout << cfg::ImmediateDominators(cfg::DominatorSet(M, true));
}
static void PrintPostDomTree(Method *M) {
cout << cfg::DominatorTree(cfg::DominatorSet(M, true));
}
static void PrintPostDomFrontier(Method *M) {
cout << cfg::DominanceFrontier(cfg::DominatorSet(M, true));
}
enum Ans {
print, intervals, exprclassify,
domset, idom, domtree, domfrontier,
postdomset, postidom, postdomtree, postdomfrontier,
};
cl::String InputFilename ("", "Load <arg> file to analyze", 0, "-");
cl::Flag Quiet ("q", "Don't print analysis pass names", 0, false);
cl::EnumList<enum Ans> AnalysesList(cl::NoFlags,
clEnumVal(print , "Print each Method"),
clEnumVal(intervals , "Print Interval Partitions"),
clEnumVal(exprclassify , "Classify Expressions"),
clEnumVal(domset , "Print Dominator Sets"),
clEnumVal(idom , "Print Immediate Dominators"),
clEnumVal(domtree , "Print Dominator Tree"),
clEnumVal(domfrontier , "Print Dominance Frontier"),
clEnumVal(postdomset , "Print Postdominator Sets"),
clEnumVal(postidom , "Print Immediate Postdominators"),
clEnumVal(postdomtree , "Print Post Dominator Tree"),
clEnumVal(postdomfrontier, "Print Postdominance Frontier"),
0);
struct {
enum Ans AnID;
void (*AnPtr)(Method *M);
} AnTable[] = {
{ print , PrintMethod },
{ intervals , PrintIntervalPartition },
{ exprclassify , PrintClassifiedExprs },
{ domset , PrintDominatorSets },
{ idom , PrintImmediateDominators },
{ domtree , PrintDominatorTree },
{ domfrontier , PrintDominanceFrontier },
{ postdomset , PrintPostDominatorSets },
{ postidom , PrintImmediatePostDoms },
{ postdomtree , PrintPostDomTree },
{ postdomfrontier, PrintPostDomFrontier },
};
int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, " llvm analysis printer tool\n");
Module *C = ParseBytecodeFile(InputFilename.getValue());
if (!C && !(C = ParseAssemblyFile(InputFilename.getValue()))) {
cerr << "Input file didn't read correctly.\n";
return 1;
}
// Loop over all of the methods in the module...
for (Module::iterator I = C->begin(), E = C->end(); I != E; ++I) {
Method *M = *I;
if (M->isExternal()) continue;
for (unsigned i = 0; i < AnalysesList.size(); ++i) {
enum Ans AnalysisPass = AnalysesList[i];
// Loop over all of the analyses to be run...
unsigned j;
for (j = 0; j < sizeof(AnTable)/sizeof(AnTable[0]); ++j) {
if (AnalysisPass == AnTable[j].AnID) {
if (!Quiet)
cerr << "Running: " << AnalysesList.getArgDescription(AnalysisPass)
<< " analysis on '" << ((Value*)M)->getName() << "'!\n";
AnTable[j].AnPtr(M);
break;
}
}
if (j == sizeof(AnTable)/sizeof(AnTable[0]))
cerr << "Analysis tables inconsistent!\n";
}
}
delete C;
return 0;
}
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