r266848 - in /trunk/gcc: ChangeLog generic-matc...

[jakub@gcc.gnu.org]

Author: jakub
Date: Thu Dec  6 10:45:47 2018
New Revision: 266848

URL: https://gcc.gnu.org/viewcvs?rev=266848&root=gcc&view=rev
Log:
	PR tree-optimization/85726
	* generic-match-head.c (optimize_successive_divisions_p): New function.
	* gimple-match-head.c (optimize_successive_divisions_p): Likewise.
	* match.pd: Don't combine successive divisions if they aren't exact
	and optimize_successive_divisions_p is false.

	* gcc.dg/tree-ssa/pr85726-1.c: New test.
	* gcc.dg/tree-ssa/pr85726-2.c: New test.
	* gcc.dg/tree-ssa/pr85726-3.c: New test.
	* gcc.dg/tree-ssa/pr85726-4.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr85726-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr85726-2.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr85726-3.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr85726-4.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/generic-match-head.c
    trunk/gcc/gimple-match-head.c
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog