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[Bug target/27770] [4.2 Regression] wrong code in spec tests for -ftree-vectorize -maltivec
- From: "richard at codesourcery dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 6 Jun 2006 15:16:33 -0000
- Subject: [Bug target/27770] [4.2 Regression] wrong code in spec tests for -ftree-vectorize -maltivec
- References: <bug-27770-4503@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #11 from richard at codesourcery dot com 2006-06-06 15:16 -------
Subject: Re: [4.2 Regression] wrong code in spec tests for -ftree-vectorize
-maltivec
"dje at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> writes:
> The auto-vectorizer is a Tree-SSA pass. The section anchors are an
> RTL pass. I do not understand why the alignment of the vectorized
> variables is not known at section anchor creation time.
The rtl optimisations for bar() precede the tree optimisations
for foo().
Richard
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27770