1 //===- ProvenanceAnalysisEvaluator.cpp - ObjC ARC Optimization ------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "ProvenanceAnalysis.h" 10 #include "llvm/Transforms/ObjCARC.h" 11 #include "llvm/ADT/SetVector.h" 12 #include "llvm/Analysis/AliasAnalysis.h" 13 #include "llvm/IR/Function.h" 14 #include "llvm/IR/InstIterator.h" 15 #include "llvm/Support/raw_ostream.h" 16 17 using namespace llvm; 18 using namespace llvm::objcarc; 19 20 static StringRef getName(Value *V) { 21 StringRef Name = V->getName(); 22 if (Name.starts_with("\1")) 23 return Name.substr(1); 24 return Name; 25 } 26 27 static void insertIfNamed(SetVector<Value *> &Values, Value *V) { 28 if (!V->hasName()) 29 return; 30 Values.insert(V); 31 } 32 33 PreservedAnalyses PAEvalPass::run(Function &F, FunctionAnalysisManager &AM) { 34 SetVector<Value *> Values; 35 36 for (auto &Arg : F.args()) 37 insertIfNamed(Values, &Arg); 38 39 for (Instruction &I : instructions(F)) { 40 insertIfNamed(Values, &I); 41 42 for (auto &Op : I.operands()) 43 insertIfNamed(Values, Op); 44 } 45 46 ProvenanceAnalysis PA; 47 PA.setAA(&AM.getResult<AAManager>(F)); 48 49 for (Value *V1 : Values) { 50 StringRef NameV1 = getName(V1); 51 for (Value *V2 : Values) { 52 StringRef NameV2 = getName(V2); 53 if (NameV1 >= NameV2) 54 continue; 55 errs() << NameV1 << " and " << NameV2; 56 if (PA.related(V1, V2)) 57 errs() << " are related.\n"; 58 else 59 errs() << " are not related.\n"; 60 } 61 } 62 63 return PreservedAnalyses::all(); 64 } 65