re PR tree-optimization/26629 (tree load PRE does not work on array references)

re PR tree-optimization/26629 (tree load PRE does not work on array references)

2006-03-20  Andrew Pinski  <pinskia@physics.uc.edu>

        PR tree-opt/26629
        * tree-ssa-pre (phi_translate): Handle ARRAY_REF's operands.
        (valid_in_set): Handle ARRAY_REF.
        Change "if min_variant or VH" to asserts.
        (create_component_ref_by_pieces): Handle ARRAY_REF.
        (create_expression_by_pieces): Likewise.
        (can_PRE_operation): ARRAY_REFs can now be PRE'd.

2006-03-20  Andrew Pinski  <pinskia@physics.uc.edu>

        PR tree-opt/26629
        * gcc.dg/tree-ssa/loadpre12.c: New test.
        * gcc.dg/tree-ssa/loadpre13.c: New test.
        * gcc.dg/tree-ssa/loadpre14.c: New test.
        * gcc.dg/tree-ssa/loadpre15.c: New test.
        * gcc.dg/tree-ssa/loadpre16.c: New test.
        * gcc.dg/tree-ssa/loadpre17.c: New test.
        * gcc.dg/tree-ssa/loadpre18.c: New test.
        * gcc.dg/tree-ssa/loadpre19.c: New test.
        * gcc.dg/tree-ssa/loadpre20.c: New test.
        * gcc.dg/tree-ssa/loadpre21.c: New test.
        * gcc.dg/tree-ssa/loadpre22.c: New test.

From-SVN: r112227