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[Bug tree-optimization/53364] [4.7/4.8 Regression] Wrong code generation
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 16 May 2012 11:07:46 +0000
- Subject: [Bug tree-optimization/53364] [4.7/4.8 Regression] Wrong code generation
- Auto-submitted: auto-generated
- References: <bug-53364-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53364
--- Comment #7 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-16 11:07:46 UTC ---
This is aliasing_component_refs_p returning that *D.2309_15 does not
alias MEM[(struct A *)&D.2249].m_x (This is *(struct B *)&D.2249 vs.
*(struct A *)&D.2249)
This is because this is a view-converted base but we don't detect that
properly in indirect_ref_may_alias_decl_p.
I have a patch.