[Bug tree-optimization/48317] SCCVN does not handle vector constructors

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48317

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-09-06 13:17:53 UTC ---
Author: rguenth
Date: Tue Sep  6 13:17:50 2011
New Revision: 178595

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=178595
Log:
2011-09-06  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/48317
    * tree-ssa-sccvn.h (struct vn_nary_op_s): Make op a true
    trailing array.
    (sizeof_vn_nary_op): New inline function.
    (vn_nary_op_lookup_pieces): Adjust.
    (vn_nary_op_insert_pieces): Likewise.
    * tree-ssa-sccvn.c (vn_nary_op_eq): Also compare the length.
    (init_vn_nary_op_from_pieces): Adjust signature.  Deal with
    any number of operands.
    (vn_nary_length_from_stmt): New function.
    (init_vn_nary_op_from_stmt): Adjust for CONSTRUCTOR handling.
    (vn_nary_op_lookup_pieces): Adjust signature and allocate properly
    sized temporary.
    (vn_nary_op_lookup): Likewise.
    (vn_nary_op_lookup_stmt): Likewise.
    (vn_nary_op_insert_into): Likewise.
    (vn_nary_op_insert_stmt): Likewise.
    (visit_use): Handle CONSTRUCTOR as nary.
    * tree-ssa-pre.c (phi_translate_1): Adjust.
    (create_expression_by_pieces): Likewise.
    (compute_avail): Likewise.

    * gcc.dg/tree-ssa/ssa-fre-31.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-31.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c
    trunk/gcc/tree-ssa-sccvn.c
    trunk/gcc/tree-ssa-sccvn.h