r236728 - in /trunk/gcc: ChangeLog ifcvt.c test...

[ktkachov@gcc.gnu.org]

Author: ktkachov
Date: Wed May 25 15:53:21 2016
New Revision: 236728

URL: https://gcc.gnu.org/viewcvs?rev=236728&root=gcc&view=rev
Log:
[RTL ifcvt] PR rtl-optimization/66940: Avoid signed overflow in noce_get_alt_condition

	PR rtl-optimization/66940
	* ifcvt.c (noce_get_alt_condition): Check that incrementing or
	decrementing desired_val will not overflow before performing these
	operations.

	* gcc.c-torture/execute/pr66940.c: New test.


Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr66940.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ifcvt.c
    trunk/gcc/testsuite/ChangeLog