[Bug tree-optimization/50838] [4.7 Regression] ice in refs_may_alias_p_1 with -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50838

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-10-24 
12:31:06 UTC ---
Author: rguenth
Date: Mon Oct 24 12:31:01 2011
New Revision: 180381

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=180381
Log:
2011-10-24  Richard Guenther  <rguent...@suse.de>

    PR tree-optimization/50838
    * tree-data-ref.c (dr_analyze_indices): Properly canonicalize
    a MEM_REF base if we change it.

    * gcc.dg/torture/pr50838.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr50838.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-data-ref.c