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[objc-arc] Added annotation option to only emit annotations for a specific ssa identifier.
llvm-svn: 179729
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198846e1d1
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@ -716,6 +716,12 @@ static cl::opt<bool>
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DisableCheckForCFGHazards("disable-objc-arc-checkforcfghazards", cl::init(false),
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cl::desc("Disable check for cfg hazards when "
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"annotating"));
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static cl::opt<std::string>
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ARCAnnotationTargetIdentifier("objc-arc-annotation-target-identifier",
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cl::init(""),
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cl::desc("filter out all data flow annotations "
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"but those that apply to the given "
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"target llvm identifier."));
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/// This function appends a unique ARCAnnotationProvenanceSourceMDKind id to an
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/// instruction so that we can track backwards when post processing via the llvm
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@ -800,6 +806,12 @@ static void AppendMDNodeToInstForPtr(unsigned NodeId,
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/// state of a pointer at the entrance to a basic block.
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static void GenerateARCBBEntranceAnnotation(const char *Name, BasicBlock *BB,
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Value *Ptr, Sequence Seq) {
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// If we have a target identifier, make sure that we match it before
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// continuing.
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if(!ARCAnnotationTargetIdentifier.empty() &&
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!Ptr->getName().equals(ARCAnnotationTargetIdentifier))
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return;
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Module *M = BB->getParent()->getParent();
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LLVMContext &C = M->getContext();
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Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
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@ -837,6 +849,12 @@ static void GenerateARCBBEntranceAnnotation(const char *Name, BasicBlock *BB,
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/// of the pointer at the bottom of the basic block.
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static void GenerateARCBBTerminatorAnnotation(const char *Name, BasicBlock *BB,
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Value *Ptr, Sequence Seq) {
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// If we have a target identifier, make sure that we match it before emitting
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// an annotation.
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if(!ARCAnnotationTargetIdentifier.empty() &&
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!Ptr->getName().equals(ARCAnnotationTargetIdentifier))
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return;
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Module *M = BB->getParent()->getParent();
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LLVMContext &C = M->getContext();
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Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
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@ -878,6 +896,12 @@ static void GenerateARCAnnotation(unsigned InstMDId,
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Sequence OldSeq,
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Sequence NewSeq) {
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if (EnableARCAnnotations) {
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// If we have a target identifier, make sure that we match it before
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// emitting an annotation.
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if(!ARCAnnotationTargetIdentifier.empty() &&
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!Ptr->getName().equals(ARCAnnotationTargetIdentifier))
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return;
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// First generate the source annotation on our pointer. This will return an
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// MDString* if Ptr actually comes from an instruction implying we can put
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// in a source annotation. If AppendMDNodeToSourcePtr returns 0 (i.e. NULL),
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