3 Commits

Author	SHA1	Message	Date
Sanjoy Das	5e3a215bf7	[SCEV] See through op.with.overflow intrinsics (re-apply) ... Summary: This change teaches SCEV to see reduce `(extractvalue 0 (op.with.overflow X Y))` into `op X Y` (with a no-wrap tag if possible). This was first checked in at r265912 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: mcrosier, mzolotukhin, llvm-commits Differential Revision: http://reviews.llvm.org/D18684 llvm-svn: 271152	2016-05-29 00:34:42 +00:00
Sanjoy Das	23c7d74ce2	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	e72674dde8	[SCEV] See through op.with.overflow intrinsics ... Summary: This change teaches SCEV to see reduce `(extractvalue 0 (op.with.overflow X Y))` into `op X Y` (with a no-wrap tag if possible). Reviewers: atrick, regehr Subscribers: mcrosier, mzolotukhin, llvm-commits Differential Revision: http://reviews.llvm.org/D18684 llvm-svn: 265912	2016-04-10 22:50:26 +00:00