This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug sanitizer/81148] UBSAN: two more false positives
- 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, 03 Aug 2017 11:52:32 +0000
- Subject: [Bug sanitizer/81148] UBSAN: two more false positives
- Auto-submitted: auto-generated
- References: <bug-81148-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81148
--- Comment #16 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Aug 3 11:52:00 2017
New Revision: 250853
URL: https://gcc.gnu.org/viewcvs?rev=250853&root=gcc&view=rev
Log:
2017-08-03 Richard Biener <rguenther@suse.de>
PR middle-end/81148
* fold-const.c (split_tree): Add minus_var and minus_con
arguments, remove unused loc arg. Never generate NEGATE_EXPRs
here but always use minus_*.
(associate_trees): Assert we never associate with MINUS_EXPR
and NULL first operand. Do not recurse for PLUS_EXPR operands
when associating as MINUS_EXPR either.
(fold_binary_loc): Track minus_var and minus_con.
* c-c++-common/ubsan/pr81148.c: New testcase.
Added:
trunk/gcc/testsuite/c-c++-common/ubsan/pr81148.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/fold-const.c
trunk/gcc/testsuite/ChangeLog