2 Commits

Author	SHA1	Message	Date
Alina Sbirlea	a2eebb828e	Update MemorySSA in SimpleLoopUnswitch. ... Summary: Teach SimpleLoopUnswitch to preserve MemorySSA. Subscribers: sanjoy, jlebar, Prazek, george.burgess.iv, llvm-commits Differential Revision: https://reviews.llvm.org/D47022 llvm-svn: 348263	2018-12-04 14:23:37 +00:00
Max Kazantsev	619a83463f	[SimpleLoopUnswitch] Unswitch by experimental.guard intrinsics ... This patch adds support of `llvm.experimental.guard` intrinsics to non-trivial simple loop unswitching. These intrinsics represent implicit control flow which has pretty much the same semantics as usual conditional branches. The algorithm of dealing with them is following: - Consider guards as unswitching candidates; - If a guard is considered the best candidate, turn it into a branch; - Apply normal unswitching algorithm on this branch. The patch has no compile time effect on code that does not contain any guards. Differential Revision: https://reviews.llvm.org/D53744 Reviewed By: chandlerc llvm-svn: 345387	2018-10-26 14:20:11 +00:00