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[Bug middle-end/81088] UBSAN: false positive as a result of reassosiation
- 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, 28 Aug 2017 12:50:27 +0000
- Subject: [Bug middle-end/81088] UBSAN: false positive as a result of reassosiation
- Auto-submitted: auto-generated
- References: <bug-81088-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81088
--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Aug 28 12:49:55 2017
New Revision: 251381
URL: https://gcc.gnu.org/viewcvs?rev=251381&root=gcc&view=rev
Log:
2017-08-28 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-06-14 Richard Biener <rguenther@suse.de>
PR middle-end/81088
* fold-const.c (split_tree): Drop TREE_OVERFLOW flag from
literal constants.
(fold_binary_loc): When associating do not treat pre-existing
TREE_OVERFLOW on literal constants as a reason to allow
TREE_OVERFLOW on associated literal constants.
* c-c++-common/ubsan/pr81088.c: New testcase.
2017-06-13 Richard Biener <rguenther@suse.de>
PR middle-end/81065
* fold-const.c (extract_muldiv_1): Remove bogus distribution
case of C * (x * C2 + C3).
(fold_addr_of_array_ref_difference): Properly fold index difference.
* c-c++-common/ubsan/pr81065.c: New testcase.
2017-06-08 Marek Polacek <polacek@redhat.com>
PR sanitize/80932
* c-c++-common/ubsan/pr80932.c: Test with ints, not with long ints.
2017-06-07 Marek Polacek <polacek@redhat.com>
PR sanitizer/80932
* fold-const.c (extract_muldiv_1) <case MINUS_EXPR>: Add
TYPE_OVERFLOW_WRAPS check.
* c-c++-common/ubsan/pr80932.c: New test.
Added:
branches/gcc-7-branch/gcc/testsuite/c-c++-common/ubsan/pr80932.c
branches/gcc-7-branch/gcc/testsuite/c-c++-common/ubsan/pr81065.c
branches/gcc-7-branch/gcc/testsuite/c-c++-common/ubsan/pr81088.c
Modified:
branches/gcc-7-branch/gcc/ChangeLog
branches/gcc-7-branch/gcc/fold-const.c
branches/gcc-7-branch/gcc/testsuite/ChangeLog