r235537 - in /trunk/gcc: ChangeLog match.pd tes...

[glisse@gcc.gnu.org]

Author: glisse
Date: Wed Apr 27 21:30:27 2016
New Revision: 235537

URL: https://gcc.gnu.org/viewcvs?rev=235537&root=gcc&view=rev
Log:
match.pd: unsigned A - B > A --> A < B

2016-04-27  Marc Glisse  <marc.glisse@inria.fr>

gcc/
	* match.pd (A - B > A, A + B < A): New transformations.

gcc/testsuite/
	* gcc.dg/tree-ssa/overflow-2.c: New testcase.
	* gcc.dg/tree-ssa/minus-ovf.c: Likewise.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/minus-ovf.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/overflow-2.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog