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[Bug middle-end/80362] [5 Regression] gcc miscompiles arithmetic with signed char
- 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, 18 Sep 2017 13:15:17 +0000
- Subject: [Bug middle-end/80362] [5 Regression] gcc miscompiles arithmetic with signed char
- Auto-submitted: auto-generated
- References: <bug-80362-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80362
--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Sep 18 13:14:45 2017
New Revision: 252926
URL: https://gcc.gnu.org/viewcvs?rev=252926&root=gcc&view=rev
Log:
2017-09-18 Richard Biener <rguenther@suse.de>
Backport from mainline
2017-04-10 Richard Biener <rguenther@suse.de>
PR middle-end/80362
* fold-const.c (fold_binary_loc): Look at unstripped ops when
looking for NEGATE_EXPR in -A / -B to A / B folding.
* gcc.dg/torture/pr80362.c: New testcase.
2015-11-25 Richard Biener <rguenther@suse.de>
PR middle-end/68528
* fold-const.c (fold_binary_loc): Do not call negate_expr_p
on stripped operands.
* gcc.dg/torture/pr68528.c: New testcase.
2017-03-27 Richard Biener <rguenther@suse.de>
PR middle-end/80171
* gimple-fold.c (fold_ctor_reference): Properly guard against
NULL return value from canonicalize_constructor_val.
* g++.dg/torture/pr80171.C: New testcase.
2016-06-13 Richard Biener <rguenther@suse.de>
PR middle-end/64516
* fold-const.c (fold_unary_loc): Preserve alignment when
folding a VIEW_CONVERT_EXPR into a MEM_REF.
* gcc.dg/align-3.c: New testcase.
Added:
branches/gcc-5-branch/gcc/testsuite/g++.dg/torture/pr80171.C
branches/gcc-5-branch/gcc/testsuite/gcc.dg/align-3.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr68528.c
branches/gcc-5-branch/gcc/testsuite/gcc.dg/torture/pr80362.c
Modified:
branches/gcc-5-branch/gcc/ChangeLog
branches/gcc-5-branch/gcc/fold-const.c
branches/gcc-5-branch/gcc/gimple-fold.c
branches/gcc-5-branch/gcc/testsuite/ChangeLog