Merge SSE and AVX ptest patterns.

Merge SSE and AVX ptest patterns.

gcc/
	* config/i386/i386.c (bdesc_args): Rename CODE_FOR_sse4_1_ptest into
	CODE_FOR_sse4_1_ptestv2di and CODE_FOR_avx_vtestps256 into
	CODE_FOR_avx_ptestv4di.
	* config/i386/sse.md (define_mode_iterator V_AVX): New.
	(define_mode_attr sse4_1): Extend to other 128/256-bit modes.
	(define_insn "avx_ptest256"): Merge this ...
	(define_insn "sse4_1_ptest"): And this ...
	(define_insn "<sse4_1>_ptest<mode>"): Into this. Use V_AVX iterator.

From-SVN: r226611