diff options
| author | Dan Gohman <gohman@apple.com> | 2011-09-14 18:13:00 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2011-09-14 18:13:00 +0000 |
| commit | 211048286bef00ffcf04b1b3e1bb3de3de79965a (patch) | |
| tree | 782d5bd224410f6fcc0532ec902ee6944389b727 /lib/Transforms | |
| parent | d0588e2a2ed1f7570f13b78c2042855dc4afae10 (diff) | |
objc_retainBlock is not NoModRef because it can update forwarding pointers
in memory relevant to the optimizer. rdar://10050579.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139708 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Transforms')
| -rw-r--r-- | lib/Transforms/Scalar/ObjCARC.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/Transforms/Scalar/ObjCARC.cpp b/lib/Transforms/Scalar/ObjCARC.cpp index d753cf193f..f978f571c6 100644 --- a/lib/Transforms/Scalar/ObjCARC.cpp +++ b/lib/Transforms/Scalar/ObjCARC.cpp @@ -746,7 +746,6 @@ ObjCARCAliasAnalysis::getModRefInfo(ImmutableCallSite CS, const Location &Loc) { switch (GetBasicInstructionClass(CS.getInstruction())) { case IC_Retain: case IC_RetainRV: - case IC_RetainBlock: case IC_Autorelease: case IC_AutoreleaseRV: case IC_NoopCast: @@ -754,6 +753,8 @@ ObjCARCAliasAnalysis::getModRefInfo(ImmutableCallSite CS, const Location &Loc) { case IC_FusedRetainAutorelease: case IC_FusedRetainAutoreleaseRV: // These functions don't access any memory visible to the compiler. + // Note that this doesn't include objc_retainBlock, becuase it updates + // pointers when it copies block data. return NoModRef; default: break; |