r267692 - in /branches/gcc-8-branch/gcc: Change...

[jakub@gcc.gnu.org]

Author: jakub
Date: Tue Jan  8 10:03:34 2019
New Revision: 267692

URL: https://gcc.gnu.org/viewcvs?rev=267692&root=gcc&view=rev
Log:
	Backported from mainline
	2018-11-29  Jakub Jelinek  <jakub@redhat.com>

	PR target/88234
	* config/rs6000/rs6000.c (rs6000_gimple_fold_builtin): For
	vec_add and vec_sub builtins, perform PLUS_EXPR or MINUS_EXPR
	in unsigned_type_for instead of vector integral type where overflow
	doesn't wrap.

	* gcc.dg/ubsan/pr88234.c: New test.

Added:
    branches/gcc-8-branch/gcc/testsuite/gcc.dg/ubsan/pr88234.c
Modified:
    branches/gcc-8-branch/gcc/ChangeLog
    branches/gcc-8-branch/gcc/config/rs6000/rs6000.c
    branches/gcc-8-branch/gcc/testsuite/ChangeLog