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Re: [Bug tree-optimization/28643] redundant phi-node in latch-block prevents vectorization
- From: Daniel Berlin <dberlin at dberlin dot org>
- To: gcc-bugzilla at gcc dot gnu dot org
- Cc: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 08 Aug 2006 02:14:02 -0400
- Subject: Re: [Bug tree-optimization/28643] redundant phi-node in latch-block prevents vectorization
- References: <bug-28643-8585@http.gcc.gnu.org/bugzilla/> <20060808014703.5508.qmail@sourceware.org>
pinskia at gcc dot gnu dot org wrote:
> ------- Comment #1 from pinskia at gcc dot gnu dot org 2006-08-08 01:47 -------
> SSA copy prop with dce after that should really be the correct way.
>
Err, SSA copy prop should be enough, actually, since after copy-prop,
the phi will have no users (and they shouldn't care about code with no
uses that doesn't access memory).
Though it's interesting that this redundant phi survives so long. What
is creating it?