2014-06-24  Cong Hou  <congh@google.com>

    * tree-vect-patterns.c (vect_recog_sad_pattern): New function for SAD
    pattern recognition.
    (type_conversion_p): PROMOTION is true if it's a type promotion
    conversion, and false otherwise.  Return true if the given expression
    is a type conversion one.
    * tree-vectorizer.h: Adjust the number of patterns.
    * tree.def: Add SAD_EXPR.
    * optabs.def: Add sad_optab.
    * cfgexpand.c (expand_debug_expr): Add SAD_EXPR case.
    * expr.c (expand_expr_real_2): Likewise.
    * gimple-pretty-print.c (dump_ternary_rhs): Likewise.
    * gimple.c (get_gimple_rhs_num_ops): Likewise.
    * optabs.c (optab_for_tree_code): Likewise.
    * tree-cfg.c (estimate_operator_cost): Likewise.
    * tree-ssa-operands.c (get_expr_operands): Likewise.
    * tree-vect-loop.c (get_initial_def_for_reduction): Likewise.
    * config/i386/sse.md: Add SSE2 and AVX2 expand for SAD.
    * doc/generic.texi: Add document for SAD_EXPR.
    * doc/md.texi: Add document for ssad and usad.

2014-06-24  Cong Hou  <congh@google.com>

    * gcc.dg/vect/vect-reduc-sad.c: New.
    * lib/target-supports.exp (check_effective_target_vect_usad_char): New.

From-SVN: r211966