[Bug middle-end/42509] [4.4 Regression] nonoverlapping_memrefs_p misinterprets NULL MEM_OFFSET as const0_rtx

[uweigand at gcc dot gnu dot org]

------- Comment #29 from uweigand at gcc dot gnu dot org  2010-07-28 18:00 -------
Subject: Bug 42509

Author: uweigand
Date: Wed Jul 28 18:00:08 2010
New Revision: 162650

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=162650
Log:
        Backport from mainline:
        2010-04-03  Richard Guenther  <rguenther@suse.de>

        PR middle-end/42509
        * alias.c (nonoverlapping_memrefs_p): For spill-slot accesses
        require a non-NULL MEM_OFFSET.

Modified:
    branches/gcc-4_4-branch/gcc/ChangeLog
    branches/gcc-4_4-branch/gcc/alias.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42509