//
ImmutablePass *createObjCARCAliasAnalysisPass();
+ FunctionPass *createPAEvalPass();
+
//===--------------------------------------------------------------------===//
//
/// createLazyValueInfoPass - This creates an instance of the LazyValueInfo
void initializeObjCARCExpandPass(PassRegistry&);
void initializeObjCARCContractPass(PassRegistry&);
void initializeObjCARCOptPass(PassRegistry&);
+void initializePAEvalPass(PassRegistry &);
void initializeOptimizePHIsPass(PassRegistry&);
void initializePartiallyInlineLibCallsPass(PassRegistry&);
void initializePEIPass(PassRegistry&);
(void) llvm::createObjCARCExpandPass();
(void) llvm::createObjCARCContractPass();
(void) llvm::createObjCARCOptPass();
+ (void) llvm::createPAEvalPass();
(void) llvm::createPromoteMemoryToRegisterPass();
(void) llvm::createDemoteRegisterToMemoryPass();
(void) llvm::createPruneEHPass();
initializeTargetTransformInfoAnalysisGroup(Registry);
initializeTypeBasedAliasAnalysisPass(Registry);
initializeScopedNoAliasAAPass(Registry);
+ initializePAEvalPass(Registry);
}
void LLVMInitializeAnalysis(LLVMPassRegistryRef R) {
ObjCARCContract.cpp
DependencyAnalysis.cpp
ProvenanceAnalysis.cpp
+ ProvenanceAnalysisEvaluator.cpp
)
add_dependencies(LLVMObjCARCOpts intrinsics_gen)
StringRef Name = GV->getName();
// These special variables are known to hold values which are not
// reference-counted pointers.
- if (Name.startswith("\01L_OBJC_SELECTOR_REFERENCES_") ||
- Name.startswith("\01L_OBJC_CLASSLIST_REFERENCES_") ||
- Name.startswith("\01L_OBJC_CLASSLIST_SUP_REFS_$_") ||
- Name.startswith("\01L_OBJC_METH_VAR_NAME_") ||
- Name.startswith("\01l_objc_msgSend_fixup_"))
+ if (Name.startswith("\01l_objc_msgSend_fixup_"))
+ return true;
+
+ StringRef Section = GV->getSection();
+ if (Section.find("__message_refs") != StringRef::npos ||
+ Section.find("__objc_classrefs") != StringRef::npos ||
+ Section.find("__objc_superrefs") != StringRef::npos ||
+ Section.find("__objc_methname") != StringRef::npos ||
+ Section.find("__cstring") != StringRef::npos)
return true;
}
}
--- /dev/null
+//===- 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/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>());
+
+ 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))
+ 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)
--- /dev/null
+; RUN: opt -disable-output -pa-eval %s 2>&1 | FileCheck %s
+
+@"\01l_objc_msgSend_fixup_" = global i8 0
+@g1 = global i8 0, section "__OBJC,__message_refs,literal_pointers,no_dead_strip"
+@g2 = global i8 0, section "__DATA, __objc_classrefs, regular, no_dead_strip"
+@g3 = global i8 0, section "__DATA, __objc_superrefs, regular, no_dead_strip"
+@g4 = global i8 0, section "__TEXT,__objc_methname,cstring_literals"
+@g5 = global i8 0, section "__TEXT,__cstring,cstring_literals"
+
+declare void @g(i8)
+
+define void @f(i8* %a, i8** %b, i8** %c) {
+ %y1 = load i8* %a
+ call void @g(i8 %y1)
+
+ %y2 = load i8** %b
+ %y3 = load i8** %c
+
+ %x0 = load i8* @"\01l_objc_msgSend_fixup_"
+ call void @g(i8 %x0)
+
+ %x1 = load i8* @g1
+ call void @g(i8 %x1)
+
+ %x2 = load i8* @g2
+ call void @g(i8 %x2)
+
+ %x3 = load i8* @g3
+ call void @g(i8 %x3)
+
+ %x4 = load i8* @g4
+ call void @g(i8 %x4)
+
+ %x5 = load i8* @g5
+ call void @g(i8 %x5)
+ ret void
+}
+
+; CHECK: y1 and y2 are related.
+; CHECK: y1 and y3 are related.
+; CHECK: y2 and y3 are related.
+; CHECK: x0 and y1 are not related.
+; CHECK: x0 and y2 are not related.
+; CHECK: x0 and y3 are not related.
+; CHECK: l_objc_msgSend_fixup_ and y1 are not related.
+; CHECK: l_objc_msgSend_fixup_ and y2 are not related.
+; CHECK: l_objc_msgSend_fixup_ and y3 are not related.
+; CHECK: x1 and y1 are not related.
+; CHECK: x2 and y1 are not related.
+; CHECK: x3 and y1 are not related.
+; CHECK: x4 and y1 are not related.
+; CHECK: x5 and y1 are not related.