[PATCH] Fix PR50731

[Richard Guenther]

We failed to handle the case of a scalar shift operand in do_binop.

Bootstrapped and tested on x86_64-unknown-linux-gnu, applied.

Richard.

2010-10-27  Richard Guenther  <rguent...@suse.de>

        PR middle-end/50731
        * tree-vect-generic.c (do_binop): Handle scalar operands.

Index: gcc/tree-vect-generic.c
===================================================================
*** gcc/tree-vect-generic.c     (revision 180561)
--- gcc/tree-vect-generic.c     (working copy)
*************** static tree
*** 125,132 ****
  do_binop (gimple_stmt_iterator *gsi, tree inner_type, tree a, tree b,
          tree bitpos, tree bitsize, enum tree_code code)
  {
!   a = tree_vec_extract (gsi, inner_type, a, bitsize, bitpos);
!   b = tree_vec_extract (gsi, inner_type, b, bitsize, bitpos);
    return gimplify_build2 (gsi, code, inner_type, a, b);
  }
  
--- 125,134 ----
  do_binop (gimple_stmt_iterator *gsi, tree inner_type, tree a, tree b,
          tree bitpos, tree bitsize, enum tree_code code)
  {
!   if (TREE_CODE (TREE_TYPE (a)) == VECTOR_TYPE)
!     a = tree_vec_extract (gsi, inner_type, a, bitsize, bitpos);
!   if (TREE_CODE (TREE_TYPE (b)) == VECTOR_TYPE)
!     b = tree_vec_extract (gsi, inner_type, b, bitsize, bitpos);
    return gimplify_build2 (gsi, code, inner_type, a, b);
  }