common.opt: Introduced a new option -fsimd-cost-model.

common.opt: Introduced a new option -fsimd-cost-model.

gcc/
	* common.opt: Introduced a new option -fsimd-cost-model.
	* doc/invoke.texi: Introduced a new openmp-simd warning and
	a new -fsimd-cost-model option.
	* tree-vectorizer.h (unlimited_cost_model): Interface updated
	to rely on the particular loop info.
	* tree-vect-data-refs.c (vect_peeling_hash_insert): Ditto.
	(vect_peeling_hash_choose_best_peeling): Ditto.
	(vect_enhance_data_refs_alignment): Ditto.
	* tree-vect-slp.c (vect_slp_analyze_bb_1): Ditto.
	* tree-vect-loop.c (vect_estimate_min_profitable_iters): Ditto
	plus added openmp-simd warining.

gcc/c-family/
	* c.opt (Wopenmp-simd): New.

gcc/fortran/
	* lang.opt (Wopenmp-simd): New.

From-SVN: r205475