re PR target/93089 (Force mprefer-vector-width=512 in 'e' simd clones)

re PR target/93089 (Force mprefer-vector-width=512 in 'e' simd clones)

	PR target/93089
	* config/i386/i386.opt (x_prefer_vector_width_type): Remove TargetSave
	entry.
	(mprefer-vector-width=): Add Save.
	* config/i386/i386-options.c (ix86_target_string): Add PVW argument, print
	-mprefer-vector-width= if non-zero.  Fix up -mfpmath= comment.
	(ix86_debug_options, ix86_function_specific_print): Adjust
	ix86_target_string callers.
	(ix86_valid_target_attribute_inner_p): Handle prefer-vector-width=.
	(ix86_valid_target_attribute_tree): Likewise.
	* config/i386/i386-options.h (ix86_target_string): Add PVW argument.
	* config/i386/i386-expand.c (ix86_expand_builtin): Adjust
	ix86_target_string caller.

	* gcc.target/i386/pr93089-1.c: New test.

From-SVN: r279856