r278583 - in /branches/gcc-8-branch/gcc: Change...

[jakub@gcc.gnu.org]

Author: jakub
Date: Thu Nov 21 17:18:17 2019
New Revision: 278583

URL: https://gcc.gnu.org/viewcvs?rev=278583&root=gcc&view=rev
Log:
	Backported from mainline
	2019-11-19  Jakub Jelinek  <jakub@redhat.com>

	PR middle-end/91450
	* internal-fn.c (expand_mul_overflow): For s1 * s2 -> ur, if one
	operand is negative and one non-negative, compare the non-negative
	one against 0 rather than comparing s1 & s2 against 0.  Otherwise,
	don't compare (s1 & s2) == 0, but compare separately both s1 == 0
	and s2 == 0, unless one of them is known to be negative.  Remove
	tem2 variable, use tem where tem2 has been used before.

	* gcc.c-torture/execute/pr91450-1.c: New test.
	* gcc.c-torture/execute/pr91450-2.c: New test.

Added:
    branches/gcc-8-branch/gcc/testsuite/gcc.c-torture/execute/pr91450-1.c
    branches/gcc-8-branch/gcc/testsuite/gcc.c-torture/execute/pr91450-2.c
Modified:
    branches/gcc-8-branch/gcc/ChangeLog
    branches/gcc-8-branch/gcc/internal-fn.c
    branches/gcc-8-branch/gcc/testsuite/ChangeLog