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[objc-arc] Added annotation option to only emit annotations for a specific ssa identifier.

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llvm-svn: 179729
This commit is contained in:
Michael Gottesman 2013-04-17 21:59:41 +00:00
parent 198846e1d1
commit 5841ceeb4b
1 changed files with 24 additions and 0 deletions
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24
lib/Transforms/ObjCARC/ObjCARCOpts.cpp
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@ -716,6 +716,12 @@ static cl::opt<bool>
DisableCheckForCFGHazards("disable-objc-arc-checkforcfghazards", cl::init(false),
cl::desc("Disable check for cfg hazards when "
"annotating"));
static cl::opt<std::string>
ARCAnnotationTargetIdentifier("objc-arc-annotation-target-identifier",
cl::init(""),
cl::desc("filter out all data flow annotations "
"but those that apply to the given "
"target llvm identifier."));
/// This function appends a unique ARCAnnotationProvenanceSourceMDKind id to an
/// instruction so that we can track backwards when post processing via the llvm
@ -800,6 +806,12 @@ static void AppendMDNodeToInstForPtr(unsigned NodeId,
/// state of a pointer at the entrance to a basic block.
static void GenerateARCBBEntranceAnnotation(const char *Name, BasicBlock *BB,
Value *Ptr, Sequence Seq) {
// If we have a target identifier, make sure that we match it before
// continuing.
if(!ARCAnnotationTargetIdentifier.empty() &&
!Ptr->getName().equals(ARCAnnotationTargetIdentifier))
return;
Module *M = BB->getParent()->getParent();
LLVMContext &C = M->getContext();
Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
@ -837,6 +849,12 @@ static void GenerateARCBBEntranceAnnotation(const char *Name, BasicBlock *BB,
/// of the pointer at the bottom of the basic block.
static void GenerateARCBBTerminatorAnnotation(const char *Name, BasicBlock *BB,
Value *Ptr, Sequence Seq) {
// If we have a target identifier, make sure that we match it before emitting
// an annotation.
if(!ARCAnnotationTargetIdentifier.empty() &&
!Ptr->getName().equals(ARCAnnotationTargetIdentifier))
return;
Module *M = BB->getParent()->getParent();
LLVMContext &C = M->getContext();
Type *I8X = PointerType::getUnqual(Type::getInt8Ty(C));
@ -878,6 +896,12 @@ static void GenerateARCAnnotation(unsigned InstMDId,
Sequence OldSeq,
Sequence NewSeq) {
if (EnableARCAnnotations) {
// If we have a target identifier, make sure that we match it before
// emitting an annotation.
if(!ARCAnnotationTargetIdentifier.empty() &&
!Ptr->getName().equals(ARCAnnotationTargetIdentifier))
return;
// First generate the source annotation on our pointer. This will return an
// MDString* if Ptr actually comes from an instruction implying we can put
// in a source annotation. If AppendMDNodeToSourcePtr returns 0 (i.e. NULL),