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[Bug tree-optimization/40550] Segmentation fault caused by alignment error in sse code
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 28 Jun 2009 10:25:22 -0000
- Subject: [Bug tree-optimization/40550] Segmentation fault caused by alignment error in sse code
- References: <bug-40550-17764@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #10 from ubizjak at gmail dot com 2009-06-28 10:25 -------
(In reply to comment #9)
> This happens in veclower pass.
type_for_widest_vector_mode () is forcing operations from v2sf to v4sf. This is
not correct, since there will be garbage in the top two elements. For FP
values, this will lead to all sorts of NaNs, subnormals, etc...
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40550