r266619 - in /trunk/gcc: ChangeLog config/rs600...

[jakub@gcc.gnu.org]

Author: jakub
Date: Thu Nov 29 14:23:21 2018
New Revision: 266619

URL: https://gcc.gnu.org/viewcvs?rev=266619&root=gcc&view=rev
Log:
	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:
    trunk/gcc/testsuite/gcc.dg/ubsan/pr88234.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/testsuite/ChangeLog