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(parent: fa1ee88) | patch
Teach the ARC optimizer about the !clang.arc.copy_on_escape metadata
authorDan Gohman <gohman@apple.com>
Mon, 17 Oct 2011 22:53:25 +0000 (22:53 +0000)
committerDan Gohman <gohman@apple.com>
Mon, 17 Oct 2011 22:53:25 +0000 (22:53 +0000)
commita974beaa1f63394a67c38c66ff0f39a759c7998f
tree4e9f7d7952796d1c49af0fd679f0108320d0bb44tree | snapshot
parentfa1ee880520d8da1168278c65575241487f871dfcommit | diff
Teach the ARC optimizer about the !clang.arc.copy_on_escape metadata
tag on objc_retainBlock calls, which indicates that they may be
optimized away. rdar://10211286.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@142298 91177308-0d34-0410-b5e6-96231b3b80d8
lib/Transforms/Scalar/ObjCARC.cpp diff | blob | history
test/Transforms/ObjCARC/retain-block-alloca.ll diff | blob | history
C/C++ LLVM-based compilers that forbids OOTA behaviors