[Bug tree-optimization/61634] [4.8 Regression] ICE in in vect_get_vec_def_for_operand, at tree-vect-stmts.c:1423

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61634

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Thu Feb 26 13:28:48 2015
New Revision: 221006

URL: https://gcc.gnu.org/viewcvs?rev=221006&root=gcc&view=rev
Log:
2015-02-26  Richard Biener  <rguent...@suse.de>

    Backport from mainline
    2014-11-27  Richard Biener  <rguent...@suse.de>

    PR tree-optimization/61634
    * tree-vect-slp.c: (vect_detect_hybrid_slp_stmts): Rewrite to
    propagate hybrid down the SLP tree for one scalar statement.
    (vect_detect_hybrid_slp_1): New walker function.
    (vect_detect_hybrid_slp_2): Likewise.
    (vect_detect_hybrid_slp): Properly handle pattern statements
    in a pre-scan over all loop stmts.

    * gcc.dg/vect/pr61634.c: New testcase.

Added:
    branches/gcc-4_8-branch/gcc/testsuite/gcc.dg/vect/pr61634.c
Modified:
    branches/gcc-4_8-branch/gcc/ChangeLog
    branches/gcc-4_8-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_8-branch/gcc/tree-vect-slp.c