Implement interleave via permutation.

        * expr.c (expand_expr_real_2) [VEC_EXTRACT_EVEN_EXPR]: Use binop.
        [VEC_EXTRACT_ODD_EXPR, VEC_INTERLEAVE_HIGH_EXPR]: Likewise.
        [VEC_INTERLEAVE_LOW_EXPR]: Likewise.
        * optabs.c (expand_binop): Implement vec_interleave_high_optab,
        vec_interleave_low_optab, vec_extract_even_optab,
        vec_extract_odd_optab with expand_vec_perm.
        (can_vec_perm_for_code_p): New.
        * optabs.h: Update.
        * tree-vect-data-refs.c (vect_strided_store_supported): Allow for
        fallback via can_vec_perm_for_code_p.
        (vect_strided_load_supported): Likewise.
        * tree-vect-generic.c (expand_vector_operations_1): Never lower
        VEC_INTERLEAVE_HIGH_EXPR, VEC_INTERLEAVE_LOW_EXPR,
        VEC_EXTRACT_EVEN_EXPR, VEC_EXTRACT_ODD_EXPR.

From-SVN: r180450

1 files changed, 1 insertions, 19 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index 121db5e..84cfe5c 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -8667,27 +8667,9 @@ expand_expr_real_2 (sepops ops, rtx target, enum machine_mode tmode,
 
     case VEC_EXTRACT_EVEN_EXPR:
     case VEC_EXTRACT_ODD_EXPR:
-      {
-        expand_operands (treeop0,  treeop1,
-                         NULL_RTX, &op0, &op1, EXPAND_NORMAL);
-        this_optab = optab_for_tree_code (code, type, optab_default);
-        temp = expand_binop (mode, this_optab, op0, op1, target, unsignedp,
-                             OPTAB_WIDEN);
-        gcc_assert (temp);
-        return temp;
-      }
-
     case VEC_INTERLEAVE_HIGH_EXPR:
     case VEC_INTERLEAVE_LOW_EXPR:
-      {
-        expand_operands (treeop0,  treeop1,
-                         NULL_RTX, &op0, &op1, EXPAND_NORMAL);
-        this_optab = optab_for_tree_code (code, type, optab_default);
-        temp = expand_binop (mode, this_optab, op0, op1, target, unsignedp,
-                             OPTAB_WIDEN);
-        gcc_assert (temp);
-        return temp;
-      }
+      goto binop;
 
     case VEC_LSHIFT_EXPR:
     case VEC_RSHIFT_EXPR: