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[Bug tree-optimization/53773] Vectorizer generates non-canonical multiplies
- From: "rguenther at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 30 Jul 2012 08:47:35 +0000
- Subject: [Bug tree-optimization/53773] Vectorizer generates non-canonical multiplies
- Auto-submitted: auto-generated
- References: <bug-53773-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53773
--- Comment #6 from rguenther at suse dot de <rguenther at suse dot de> 2012-07-30 08:47:35 UTC ---
On Sun, 29 Jul 2012, wschmidt at gcc dot gnu.org wrote:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53773
>
> William J. Schmidt <wschmidt at gcc dot gnu.org> changed:
>
> What |Removed |Added
> ----------------------------------------------------------------------------
> AssignedTo|unassigned at gcc dot |wschmidt at gcc dot gnu.org
> |gnu.org |
> Target Milestone|--- |4.8.0
>
> --- Comment #5 from William J. Schmidt <wschmidt at gcc dot gnu.org> 2012-07-29 16:54:45 UTC ---
> I'll take this one.
>
> I think the assumption of operand placement is too embedded to tease out
> easily, so I'm going to approach this by re-canonicalizing PLUS_EXPR,
> POINTER_PLUS_EXPR, and MULT_EXPR when operand swapping has occurred. Are there
> other tree codes that could be broken?
I don't think so