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2008-05-22 Richard Guenther <rguenther@suse.de> * tree-dfa.c (refs_may_alias_p): Exit early if possible. Handle more cases of offset disambiguation that is possible if strict-aliasing rules apply. * tree-ssa-loop-im.c (mem_refs_may_alias_p): Use refs_may_alias_p for basic offset and type-based disambiguation. * gcc.dg/tree-ssa/alias-18.c: New testcase. From-SVN: r135754
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