[Bug tree-optimization/65063] [4.8/4.9/5 Regression] gcc.dg/vect/vect-double-reduc-6.c FAILs with -O3 -fno-tree-loop-ivcanon -fno-tree-vectorize

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65063

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Feb 18 13:08:58 2015
New Revision: 220788

URL: https://gcc.gnu.org/viewcvs?rev=220788&root=gcc&view=rev
Log:
2015-02-18  Richard Biener  <rguent...@suse.de>

    PR tree-optimization/65063
    * tree-predcom.c (determine_unroll_factor): Return 1 if we
    have replaced looparound PHIs.

    * gcc.dg/pr65063.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/pr65063.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-predcom.c