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[Bug middle-end/81705] [8 Regression] UBSAN: yet another false positive
- 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: Fri, 04 Aug 2017 10:34:11 +0000
- Subject: [Bug middle-end/81705] [8 Regression] UBSAN: yet another false positive
- Auto-submitted: auto-generated
- References: <bug-81705-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81705
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Aug 4 10:33:39 2017
New Revision: 250866
URL: https://gcc.gnu.org/viewcvs?rev=250866&root=gcc&view=rev
Log:
2017-08-04 Richard Biener <rguenther@suse.de>
PR middle-end/81705
* fold-const.c (fold_binary_loc): Properly restrict
minus_var0 && minus_var1 case when associating undefined overflow
entities.
* c-c++-common/ubsan/pr81705.c: New testcase.
Added:
trunk/gcc/testsuite/c-c++-common/ubsan/pr81705.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog