[Bug tree-optimization/64853] [5 Regression] wrong code at -Os and above on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64853

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Jan 29 13:50:37 2015
New Revision: 220247

URL: https://gcc.gnu.org/viewcvs?rev=220247&root=gcc&view=rev
Log:
2015-01-29  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/64853
    * tree-vrp.c (vrp_valueize_1): Do not return anything if the
    stmt will get simulated again.
    * tree-ssa-ccp.c (valueize_op_1): Likewise.

    * gcc.dg/torture/pr64853.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr64853.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-ccp.c
    trunk/gcc/tree-vrp.c