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[Bug tree-optimization/24574] a!=0?a/10:0 is not reduced to a/10
- 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: Wed, 13 Jul 2016 13:57:37 +0000
- Subject: [Bug tree-optimization/24574] a!=0?a/10:0 is not reduced to a/10
- Auto-submitted: auto-generated
- References: <bug-24574-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=24574
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Jul 13 13:57:05 2016
New Revision: 238299
URL: https://gcc.gnu.org/viewcvs?rev=238299&root=gcc&view=rev
Log:
2016-07-13 Richard Biener <rguenther@suse.de>
PR tree-optimization/24574
* tree-ssa-phiopt.c (absorbing_element_p): Pass in argument
position and add shift, rotate, divison and modulo support
for left zero.
(value_replacement): Pass in argument position to absorbing_element_p.
* gcc.dg/pr24574.c: New testcase.
Added:
trunk/gcc/testsuite/gcc.dg/pr24574.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/testsuite/ChangeLog
trunk/gcc/tree-ssa-phiopt.c