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[Bug middle-end/56956] [4.9 Regression] ftrapv traps on valid abs-like 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: Mon, 23 Nov 2015 08:33:00 +0000
- Subject: [Bug middle-end/56956] [4.9 Regression] ftrapv traps on valid abs-like code
- Auto-submitted: auto-generated
- References: <bug-56956-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=56956
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |5.3.0
Summary|[4.9/5 Regression] ftrapv |[4.9 Regression] ftrapv
|traps on valid abs-like |traps on valid abs-like
|code |code
Known to fail| |5.2.0
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Nov 23 08:32:28 2015
New Revision: 230736
URL: https://gcc.gnu.org/viewcvs?rev=230736&root=gcc&view=rev
Log:
2015-11-23 Richard Biener <rguenther@suse.de>
Backport from mainline
2015-10-29 Richard Biener <rguenther@suse.de>
PR middle-end/56956
* fold-const.c (fold_cond_expr_with_comparison): Do not fold
unsigned conditonal negation to ABS_EXPR.
* c-c++-common/ubsan/pr56956.c: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/c-c++-common/ubsan/pr56956.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/fold-const.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog