[Bug tree-optimization/69556] [6 Regression] forwprop4/match.pd undoing work from recip

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69556

--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Feb  1 15:40:23 2016
New Revision: 233040

URL: https://gcc.gnu.org/viewcvs?rev=233040&root=gcc&view=rev
Log:
2016-02-01  Richard Biener  <rguenther@suse.de>

        PR middle-end/69556
        * match.pd: Guard (C1/X)*C2 -> (C1*C2)/X with single_use.

        * gcc.dg/tree-ssa/recip-8.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/recip-8.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog