AnalysisWrappers.cpp [plain text]
#include "llvm/Module.h"
#include "llvm/Pass.h"
#include "llvm/Support/CallSite.h"
#include "llvm/Analysis/CallGraph.h"
#include "llvm/Support/raw_ostream.h"
#include <iostream>
using namespace llvm;
namespace {
struct ExternalFunctionsPassedConstants : public ModulePass {
static char ID; ExternalFunctionsPassedConstants() : ModulePass(&ID) {}
virtual bool runOnModule(Module &M) {
for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
if (!I->isDeclaration()) continue;
bool PrintedFn = false;
for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
UI != E; ++UI) {
Instruction *User = dyn_cast<Instruction>(*UI);
if (!User) continue;
CallSite CS = CallSite::get(User);
if (!CS.getInstruction()) continue;
for (CallSite::arg_iterator AI = CS.arg_begin(),
E = CS.arg_end(); AI != E; ++AI) {
if (!isa<Constant>(*AI)) continue;
if (!PrintedFn) {
errs() << "Function '" << I->getName() << "':\n";
PrintedFn = true;
}
errs() << *User;
break;
}
}
}
return false;
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
}
};
char ExternalFunctionsPassedConstants::ID = 0;
RegisterPass<ExternalFunctionsPassedConstants>
P1("print-externalfnconstants",
"Print external fn callsites passed constants");
struct CallGraphPrinter : public ModulePass {
static char ID; CallGraphPrinter() : ModulePass(&ID) {}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
AU.addRequiredTransitive<CallGraph>();
}
virtual bool runOnModule(Module &M) {
getAnalysis<CallGraph>().print(errs(), &M);
return false;
}
};
char CallGraphPrinter::ID = 0;
RegisterPass<CallGraphPrinter>
P2("print-callgraph", "Print a call graph");
}