------- 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?



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