This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug middle-end/23295] fold does not simplify -a - (5) to (-5) - a
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 23 Oct 2006 07:19:47 -0000
- Subject: [Bug middle-end/23295] fold does not simplify -a - (5) to (-5) - a
- References: <bug-23295-6528@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #10 from rguenth at gcc dot gnu dot org 2006-10-23 07:19 -------
Subject: Bug 23295
Author: rguenth
Date: Mon Oct 23 07:19:34 2006
New Revision: 117969
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=117969
Log:
2006-10-24 Richard Guenther <rguenther@suse.de>
PR middle-end/27132
PR middle-end/23295
* builtins.c (fold_binary): Remove checks for flag_wrapv
and flag_trapv where negate_expr_p covers these cases.
* gcc.dg/pr27132.c: New testcase.
* gcc.dg/pr23295.c: Likewise.
* gcc.dg/tree-ssa/pr23294.c: Adjust patterns.
* g++.dg/tree-ssa/pr19807.C: Likewise.
2006-10-23 Richard Guenther <rguenther@suse.de>
PR middle-end/29548
* fold-const.c (fold_plusminus_mult_expr): Check exact power
of two on the absolute value.
(fold_binary): Fold x * -C to -x * C if x is easily negatable
and negating -C does not overflow.
Added:
trunk/gcc/testsuite/gcc.dg/pr23295.c
trunk/gcc/testsuite/gcc.dg/pr27132.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog
trunk/gcc/testsuite/g++.dg/tree-ssa/pr19807.C
trunk/gcc/testsuite/gcc.dg/tree-ssa/pr23294.c
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23295