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[Bug tree-optimization/66948] [6 Regression] Performance regression in bit manipulation code
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 21 Jul 2015 14:04:30 +0000
- Subject: [Bug tree-optimization/66948] [6 Regression] Performance regression in bit manipulation code
- Auto-submitted: auto-generated
- References: <bug-66948-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66948
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution|--- |FIXED
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Fixed.
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jul 21 14:03:57 2015
New Revision: 226041
URL: https://gcc.gnu.org/viewcvs?rev=226041&root=gcc&view=rev
Log:
2015-07-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/66948
* genmatch.c (capture_info::walk_match): Also recurse to
captures. Properly compute expr state from captures of
captures.
* match.pd: Add single-use guards to
(X & C2) >> C1 into (X >> C1) & (C2 >> C1) transform.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/genmatch.c
trunk/gcc/match.pd