3 Commits

Author	SHA1	Message	Date
Sanjoy Das	ae09b3cd4c	[IndVars] Eliminate op.with.overflow when possible (re-apply) ... Summary: If we can prove that an op.with.overflow intrinsic does not overflow, we can get rid of the intrinsic, and replace it with non-wrapping arithmetic. This was first checked in at r265913 but reverted in r265950 because it exposed some issues around how SCEV handled post-inc add recurrences. Those issues have now been fixed. Reviewers: atrick, regehr Subscribers: sanjoy, mcrosier, llvm-commits Differential Revision: http://reviews.llvm.org/D18685 llvm-svn: 271153	2016-05-29 00:36:25 +00:00
Sanjoy Das	f9d88e650b	This reverts commit r265913 and r265912 ... See PR27315 r265913: "[IndVars] Eliminate op.with.overflow when possible" r265912: "[SCEV] See through op.with.overflow intrinsics" llvm-svn: 265950	2016-04-11 15:26:18 +00:00
Sanjoy Das	a07ad647ee	[IndVars] Eliminate op.with.overflow when possible ... Summary: If we can prove that an op.with.overflow intrinsic does not overflow, we can get rid of the intrinsic, and replace it with non-wrapping arithmetic. Reviewers: atrick, regehr Subscribers: sanjoy, mcrosier, llvm-commits Differential Revision: http://reviews.llvm.org/D18685 llvm-svn: 265913	2016-04-10 22:50:31 +00:00