[Bug tree-optimization/64495] [4.8 Regression] ICE at -O3 for trunk and wrong code for 4.8/4.9 on x86_64-linux-gnu

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64495

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Feb 24 14:05:46 2015
New Revision: 220940

URL: https://gcc.gnu.org/viewcvs?rev=220940&root=gcc&view=rev
Log:
2015-02-24  Richard Biener  <rguenther@suse.de>

    Backport from mainline
    2014-12-09  Richard Biener  <rguenther@suse.de>

    PR middle-end/64199
    * fold-const.c (fold_binary_loc): Use TREE_OVERFLOW_P.

    * gcc.dg/torture/pr64199.c: New testcase.

    2015-01-14  Richard Biener  <rguenther@suse.de>

    PR tree-optimization/64493
    PR tree-optimization/64495
    * tree-vect-loop.c (vect_finalize_reduction): For double-reductions
    assign the proper vectorized PHI to the inner loop exit PHIs.

    * gcc.dg/vect/pr64493.c: New testcase.
    * gcc.dg/vect/pr64495.c: Likewise.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/torture/pr64199.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/vect/pr64493.c
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/vect/pr64495.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/fold-const.c
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_8-branch/gcc/tree-vect-loop.c