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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;
ExprAnalysisResult R = ClassifyExpression(*I);
if (R.Var == *I) continue; // Doesn't tell us anything
cout << "\t\tExpr =";
switch (R.ExprType) {
case ExprAnalysisResult::ScaledLinear:
WriteAsOperand(cout, (Value*)R.Scale) << " *";
// fall through
case ExprAnalysisResult::Linear:
WriteAsOperand(cout, R.Var);
if (R.Offset == 0) break;
else cout << " +";
// fall through
case ExprAnalysisResult::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));
}
struct {
const string ArgName, Name;
void (*AnPtr)(Method *M);
} AnTable[] = {
{ "-print" , "Print each Method" , PrintMethod },
{ "-intervals" , "Interval Partition" , PrintIntervalPartition },
{ "-exprclassify" , "Classify Expressions" , PrintClassifiedExprs },
{ "-domset" , "Dominator Sets" , PrintDominatorSets },
{ "-idom" , "Immediate Dominators" , PrintImmediateDominators },
{ "-domtree" , "Dominator Tree" , PrintDominatorTree },
{ "-domfrontier" , "Dominance Frontier" , PrintDominanceFrontier },
{ "-postdomset" , "Postdominator Sets" , PrintPostDominatorSets },
{ "-postidom" , "Immediate Postdominators", PrintImmediatePostDoms },
{ "-postdomtree" , "Post Dominator Tree" , PrintPostDomTree },
{ "-postdomfrontier", "Postdominance Frontier" , PrintPostDomFrontier },
};
int main(int argc, char **argv) {
ToolCommandLine Options(argc, argv, false);
bool Quiet = false;
for (int i = 1; i < argc; i++) {
if (string(argv[i]) == string("--help")) {
cerr << argv[0] << " usage:\n"
<< " " << argv[0] << " --help\t - Print this usage information\n"
<< "\t --quiet\t - Do not print analysis name before output\n";
for (unsigned j = 0; j < sizeof(AnTable)/sizeof(AnTable[0]); ++j) {
cerr << "\t " << AnTable[j].ArgName << "\t - Print "
<< AnTable[j].Name << endl;
}
return 1;
} else if (string(argv[i]) == string("-q") ||
string(argv[i]) == string("--quiet")) {
Quiet = true; argv[i] = 0;
}
}
Module *C = ParseBytecodeFile(Options.getInputFilename());
if (!C && !(C = ParseAssemblyFile(Options))) {
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;
// Loop over all of the analyses to be run...
for (int i = 1; i < argc; i++) {
if (argv[i] == 0) continue;
unsigned j;
for (j = 0; j < sizeof(AnTable)/sizeof(AnTable[0]); j++) {
if (string(argv[i]) == AnTable[j].ArgName) {
if (!Quiet)
cerr << "Running: " << AnTable[j].Name << " analysis on '"
<< ((Value*)M)->getName() << "'!\n";
AnTable[j].AnPtr(M);
break;
}
}
if (j == sizeof(AnTable)/sizeof(AnTable[0]))
cerr << "'" << argv[i] << "' argument unrecognized: ignored\n";
}
}
delete C;
return 0;
}
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