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//===- ProvenanceAnalysisEvaluator.cpp - ObjC ARC Optimization ------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ProvenanceAnalysis.h"
#include "llvm/Pass.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/Passes.h"
#include "llvm/IR/InstIterator.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
using namespace llvm::objcarc;
namespace {
class PAEval : public FunctionPass {
public:
static char ID;
PAEval();
void getAnalysisUsage(AnalysisUsage &AU) const override;
bool runOnFunction(Function &F) override;
};
}
char PAEval::ID = 0;
PAEval::PAEval() : FunctionPass(ID) {}
void PAEval::getAnalysisUsage(AnalysisUsage &AU) const {
AU.addRequired<AliasAnalysis>();
}
static StringRef getName(Value *V) {
StringRef Name = V->getName();
if (Name.startswith("\1"))
return Name.substr(1);
return Name;
}
static void insertIfNamed(SetVector<Value *> &Values, Value *V) {
if (!V->hasName())
return;
Values.insert(V);
}
bool PAEval::runOnFunction(Function &F) {
SetVector<Value *> Values;
for (auto &Arg : F.args())
insertIfNamed(Values, &Arg);
for (auto I = inst_begin(F), E = inst_end(F); I != E; ++I) {
insertIfNamed(Values, &*I);
for (auto &Op : I->operands())
insertIfNamed(Values, Op);
}
ProvenanceAnalysis PA;
PA.setAA(&getAnalysis<AliasAnalysis>());
const DataLayout &DL = F.getParent()->getDataLayout();
for (Value *V1 : Values) {
StringRef NameV1 = getName(V1);
for (Value *V2 : Values) {
StringRef NameV2 = getName(V2);
if (NameV1 >= NameV2)
continue;
errs() << NameV1 << " and " << NameV2;
if (PA.related(V1, V2, DL))
errs() << " are related.\n";
else
errs() << " are not related.\n";
}
}
return false;
}
FunctionPass *llvm::createPAEvalPass() { return new PAEval(); }
INITIALIZE_PASS_BEGIN(PAEval, "pa-eval",
"Evaluate ProvenanceAnalysis on all pairs", false, true)
INITIALIZE_AG_DEPENDENCY(AliasAnalysis)
INITIALIZE_PASS_END(PAEval, "pa-eval",
"Evaluate ProvenanceAnalysis on all pairs", false, true)
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