re PR middle-end/68542 (10% 481.wrf performance regression)

re PR middle-end/68542 (10% 481.wrf performance regression)

gcc/

2016-02-02  Yuri Rumyantsev  <ysrumyan@gmail.com>

	PR middle-end/68542
	* config/i386/i386.c (ix86_expand_branch): Add support for conditional
	branch with vector comparison.
	* config/i386/sse.md (VI48_AVX): New mode iterator.
	(define_expand "cbranch<mode>4): Add support for conditional branch
	with vector comparison.
	* tree-vect-loop.c (optimize_mask_stores): New function.
	* tree-vect-stmts.c (vectorizable_mask_load_store): Initialize
	has_mask_store field of vect_info.
	* tree-vectorizer.c (vectorize_loops): Invoke optimaze_mask_stores for
	vectorized loops having masked stores after vec_info destroy.
	* tree-vectorizer.h (loop_vec_info): Add new has_mask_store field and
	correspondent macros.
	(optimize_mask_stores): Add prototype.

gcc/testsuite

2016-02-02  Yuri Rumyantsev  <ysrumyan@gmail.com>

	PR middle-end/68542
	* gcc.dg/vect/vect-mask-store-move-1.c: New test.
	* gcc.target/i386/avx2-vect-mask-store-move1.c: New test.

From-SVN: r233068