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[Bug middle-end/55152] MAX_EXPR(a,-a) is really ABS_EXPR(a)
- 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: Thu, 29 Sep 2016 12:27:51 +0000
- Subject: [Bug middle-end/55152] MAX_EXPR(a,-a) is really ABS_EXPR(a)
- Auto-submitted: auto-generated
- References: <bug-55152-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55152
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Sep 29 12:27:19 2016
New Revision: 240615
URL: https://gcc.gnu.org/viewcvs?rev=240615&root=gcc&view=rev
Log:
2016-09-29 Richard Biener <rguenther@suse.de>
PR middle-end/55152
* match.pd: Add max(a,-a) -> abs(a) pattern.
* tree-ssa-phiopt.c (minmax_replacement): Disable for
HONOR_SIGNED_ZEROS types.
* gcc.dg/pr55152.c: New testcase.
* gcc.dg/tree-ssa/phi-opt-5.c: Adjust.
Added:
trunk/gcc/testsuite/gcc.dg/pr55152.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/match.pd
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/gcc.dg/tree-ssa/phi-opt-5.c
trunk/gcc/tree-ssa-phiopt.c