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Author SHA1 Message Date
Michael Gottesman 49f9885a2a 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
 2013-03-28 20:11:30 +00:00
Bill Wendling a032374ea0 Use references to attribute groups on the call/invoke instructions. 
Listing all of the attributes for the callee of a call/invoke instruction is way
too much and makes the IR unreadable. Use references to attributes instead.

llvm-svn: 175877
 2013-02-22 09:09:42 +00:00
Dan Gohman 728db4997a Implement proper ObjC ARC objc_retainBlock "escape" analysis, so that 
the optimizer doesn't eliminate objc_retainBlock calls which are needed
for their side effect of copying blocks onto the heap.
This implements rdar://10361249.

llvm-svn: 148076
 2012-01-13 00:39:07 +00:00