re PR tree-optimization/50031 (Sphinx3 has a 10% regression going from GCC 4.5 to GCC 4.6 on powerpc)

2012-02-10  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>
	    Ira Rosen  <irar@il.ibm.com>

	PR tree-optimization/50031
	* targhooks.c (default_builtin_vectorization_cost): Handle
	vec_promote_demote.
	* target.h (enum vect_cost_for_stmt): Add vec_promote_demote.
	* tree-vect-loop.c (vect_get_single_scalar_iteraion_cost): Handle
	all types of reduction and pattern statements.
	(vect_estimate_min_profitable_iters): Likewise.
	* tree-vect-stmts.c (vect_model_promotion_demotion_cost): New function.
	(vect_get_load_cost): Use vec_perm for permutations; add dump logic
	for explicit realigns.
	(vectorizable_conversion): Call vect_model_promotion_demotion_cost.
	* config/spu/spu.c (spu_builtin_vectorization_cost): Handle
	vec_promote_demote.
	* config/i386/i386.c (ix86_builtin_vectorization_cost): Likewise.
	* config/rs6000/rs6000.c (rs6000_builtin_vectorization_cost): Update
	vec_perm for VSX and handle vec_promote_demote.


Co-Authored-By: Ira Rosen <irar@il.ibm.com>

From-SVN: r184102