[Bug middle-end/52493] [4.8 Regression] tree check fail in ptr_derefs_may_alias_p

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52493

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-03-06 
13:13:21 UTC ---
Author: rguenth
Date: Tue Mar  6 13:13:14 2012
New Revision: 184987

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=184987
Log:
2012-03-06  Richard Guenther  <rguent...@suse.de>

    PR middle-end/52493
    * tree-ssa-alias.c (ptr_derefs_may_alias_p): Robustify.

    * gcc.dg/torture/pr52493.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr52493.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-alias.c