Revert r231575

Revert r231575

  PR middle-end/70240
  PR middle-end/68215
  2015-12-11  Eric Botcazou  <ebotcazou@adacore.com>
  * tree-vect-generic.c (tree_vec_extract): Remove GSI parameter.
  Do not gimplify the result.
  (do_unop): Adjust call to tree_vec_extract.
  (do_binop): Likewise.
  (do_compare): Likewise.
  (do_plus_minus): Likewise.
  (do_negate): Likewise.
  (expand_vector_condition): Likewise.
  (do_cond): Likewise.

Co-Authored-By: Richard Biener <rguenther@suse.de>
From-SVN: r234272