[Bug rtl-optimization/55547] [4.8 Regression] Alias analysis does not handle AND addresses correctly

[aoliva at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55547

--- Comment #13 from Alexandre Oliva <aoliva at gcc dot gnu.org> 2013-01-18 10:57:50 UTC ---
Author: aoliva
Date: Fri Jan 18 10:57:36 2013
New Revision: 195289

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=195289
Log:
PR rtl-optimization/55547
PR rtl-optimization/53827
PR debug/53671
PR debug/49888
* alias.c (offset_overlap_p): New, factored out of...
(memrefs_conflict_p): ... this.  Use absolute sizes.  Retain
the conservative special case for symbolic constants.  Don't
adjust zero sizes on alignment.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/alias.c