[Bug tree-optimization/63738] [4.9/5 Regression] ssa corruption when compiled with -O3

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63738

--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 26 15:17:31 2014
New Revision: 218089

URL: https://gcc.gnu.org/viewcvs?rev=218089&root=gcc&view=rev
Log:
2014-11-26  Richard Biener  <rguenther@suse.de>

    PR middle-end/63738
    * tree-data-ref.c (split_constant_offset_1): Do not follow
    SSA edges for SSA names with SSA_NAME_OCCURS_IN_ABNORMAL_PHI.

    * gcc.dg/torture/pr63738.c: New testcase.

Added:
    branches/gcc-4_9-branch/gcc/testsuite/gcc.dg/torture/pr63738.c
Modified:
    branches/gcc-4_9-branch/gcc/ChangeLog
    branches/gcc-4_9-branch/gcc/testsuite/ChangeLog
    branches/gcc-4_9-branch/gcc/tree-data-ref.c