r255970 - in /branches/gcc-7-branch/gcc: Change...

[jakub@gcc.gnu.org]

Author: jakub
Date: Fri Dec 22 08:52:28 2017
New Revision: 255970

URL: https://gcc.gnu.org/viewcvs?rev=255970&root=gcc&view=rev
Log:
	Backported from mainline
	2017-12-21  Jakub Jelinek  <jakub@redhat.com>

	PR tree-optimization/83523
	* tree-ssa-math-opts.c (is_widening_mult_p): Return false if
	for INTEGER_TYPE TYPE_OVERFLOW_TRAPS.
	(convert_mult_to_fma): Likewise.

	* g++.dg/tree-ssa/pr83523.C: New test.

Added:
    branches/gcc-7-branch/gcc/testsuite/g++.dg/tree-ssa/pr83523.C
Modified:
    branches/gcc-7-branch/gcc/ChangeLog
    branches/gcc-7-branch/gcc/testsuite/ChangeLog
    branches/gcc-7-branch/gcc/tree-ssa-math-opts.c