Non optimizable objc_retainBlock calls are not forwarding.

Since we handle optimizable objc_retainBlocks through strength reduction
in OptimizableIndividualCalls, we know that all code after that point
will only see non-optimizable objc_retainBlock calls. IsForwarding is
only called by functions after that point, so it is ok to just classify
objc_retainBlock as non-forwarding.

<rdar://problem/13249661>.

llvm-svn: 178285

1 files changed, 0 insertions, 3 deletions

diff --git a/llvm/lib/Transforms/ObjCARC/ObjCARC.h b/llvm/lib/Transforms/ObjCARC/ObjCARC.h
index ba98e0a9c81..614fa29e3e6 100644
--- a/llvm/lib/Transforms/ObjCARC/ObjCARC.h
+++ b/llvm/lib/Transforms/ObjCARC/ObjCARC.h
@@ -120,13 +120,10 @@ static inline bool IsAutorelease(InstructionClass Class) {
 /// \brief Test if the given class represents instructions which return their
 /// argument verbatim.
 static inline bool IsForwarding(InstructionClass Class) {
-  // objc_retainBlock technically doesn't always return its argument
-  // verbatim, but it doesn't matter for our purposes here.
   return Class == IC_Retain ||
          Class == IC_RetainRV ||
          Class == IC_Autorelease ||
          Class == IC_AutoreleaseRV ||
-         Class == IC_RetainBlock ||
          Class == IC_NoopCast;
 }