1 //===- ProvenanceAnalysisEvaluator.cpp - ObjC ARC Optimization ------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "ProvenanceAnalysis.h"
11 #include "llvm/Pass.h"
12 #include "llvm/ADT/SetVector.h"
13 #include "llvm/Analysis/AliasAnalysis.h"
14 #include "llvm/Analysis/Passes.h"
15 #include "llvm/IR/InstIterator.h"
16 #include "llvm/IR/Function.h"
17 #include "llvm/IR/Module.h"
18 #include "llvm/Support/raw_ostream.h"
19
20 using namespace llvm;
21 using namespace llvm::objcarc;
22
23 namespace {
24 class PAEval : public FunctionPass {
25
26 public:
27 static char ID;
28 PAEval();
29 void getAnalysisUsage(AnalysisUsage &AU) const override;
30 bool runOnFunction(Function &F) override;
31 };
32 }
33
34 char PAEval::ID = 0;
PAEval()35 PAEval::PAEval() : FunctionPass(ID) {}
36
getAnalysisUsage(AnalysisUsage & AU) const37 void PAEval::getAnalysisUsage(AnalysisUsage &AU) const {
38 AU.addRequired<AliasAnalysis>();
39 }
40
getName(Value * V)41 static StringRef getName(Value *V) {
42 StringRef Name = V->getName();
43 if (Name.startswith("\1"))
44 return Name.substr(1);
45 return Name;
46 }
47
insertIfNamed(SetVector<Value * > & Values,Value * V)48 static void insertIfNamed(SetVector<Value *> &Values, Value *V) {
49 if (!V->hasName())
50 return;
51 Values.insert(V);
52 }
53
runOnFunction(Function & F)54 bool PAEval::runOnFunction(Function &F) {
55 SetVector<Value *> Values;
56
57 for (auto &Arg : F.args())
58 insertIfNamed(Values, &Arg);
59
60 for (auto I = inst_begin(F), E = inst_end(F); I != E; ++I) {
61 insertIfNamed(Values, &*I);
62
63 for (auto &Op : I->operands())
64 insertIfNamed(Values, Op);
65 }
66
67 ProvenanceAnalysis PA;
68 PA.setAA(&getAnalysis<AliasAnalysis>());
69 const DataLayout &DL = F.getParent()->getDataLayout();
70
71 for (Value *V1 : Values) {
72 StringRef NameV1 = getName(V1);
73 for (Value *V2 : Values) {
74 StringRef NameV2 = getName(V2);
75 if (NameV1 >= NameV2)
76 continue;
77 errs() << NameV1 << " and " << NameV2;
78 if (PA.related(V1, V2, DL))
79 errs() << " are related.\n";
80 else
81 errs() << " are not related.\n";
82 }
83 }
84
85 return false;
86 }
87
createPAEvalPass()88 FunctionPass *llvm::createPAEvalPass() { return new PAEval(); }
89
90 INITIALIZE_PASS_BEGIN(PAEval, "pa-eval",
91 "Evaluate ProvenanceAnalysis on all pairs", false, true)
92 INITIALIZE_AG_DEPENDENCY(AliasAnalysis)
93 INITIALIZE_PASS_END(PAEval, "pa-eval",
94 "Evaluate ProvenanceAnalysis on all pairs", false, true)
95