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authorMichael Gottesman <mgottesman@apple.com>2013-04-17 21:59:41 +0000
committerMichael Gottesman <mgottesman@apple.com>2013-04-17 21:59:41 +0000
commitf92bf40cedf2204211b96d27e89e0e2f0170b78d (patch)
treea18829adcda084540fa57740b3c2ac5a65086b50 /lib
parent43239078adac6f32315cadbef9709f2f0f499707 (diff)
[objc-arc] Added annotation option to only emit annotations for a specific ssa identifier.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179729 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
-rw-r--r--lib/Transforms/ObjCARC/ObjCARCOpts.cpp24
1 files changed, 24 insertions, 0 deletions
diff --git a/lib/Transforms/ObjCARC/ObjCARCOpts.cpp b/lib/Transforms/ObjCARC/ObjCARCOpts.cpp
index ba6c04e514c..b37b9efd282 100644
--- a/lib/Transforms/ObjCARC/ObjCARCOpts.cpp
+++ b/lib/Transforms/ObjCARC/ObjCARCOpts.cpp
@@ -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),