------- Comment #8 from rguenther at suse dot de  2010-09-04 08:29 -------
Subject: Re:  VRP misses oppurtunity for statement

On Fri, 3 Sep 2010, hubicka at gcc dot gnu dot org wrote:

> ------- Comment #7 from hubicka at gcc dot gnu dot org  2010-09-03 20:28 
> -------
> In #5 the expression is created by PRE via create_expression_by_pieces that
> uses normal fold that is not able of constant variable folding. The statement
> does not get folded later and survives.  I guess one can fold all statements 
> in
> commit_edge_insertions but it seems by symptomatic?

You need to enhance fully_constant_vn_reference_p.




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