Turn UNITS_PER_SIMD_WORD into a target hook.

Turn UNITS_PER_SIMD_WORD into a target hook.

2010-09-14  H.J. Lu  <hongjiu.lu@intel.com>

	* defaults.h (UNITS_PER_SIMD_WORD): Removed.
	* config/arm/arm.h (UNITS_PER_SIMD_WORD): Likewise.
	* config/i386/i386.h (UNITS_PER_SIMD_WORD): Likewise.
	* config/mips/mips.h (UNITS_PER_SIMD_WORD): Likewise.
	* config/rs6000/rs6000.h (UNITS_PER_SIMD_WORD): Likewise.
	* config/sparc/sparc.h (UNITS_PER_SIMD_WORD): Likewise.

	* target.def: Add units_per_simd_word to vectorize.

	* targhooks.c (default_units_per_simd_word): New.
	* targhooks.h (default_units_per_simd_word): Likewise.
	* config/arm/arm.c (arm_units_per_simd_word): Likewise.
	(TARGET_VECTORIZE_UNITS_PER_SIMD_WORD): Likewise.
	* config/mips/mips.c (mips_units_per_simd_word): Likewise.
	(TARGET_VECTORIZE_UNITS_PER_SIMD_WORD): Likewise.
	* config/rs6000/rs6000.c (rs6000_units_per_simd_word): Likewise.
	(TARGET_VECTORIZE_UNITS_PER_SIMD_WORD): Likewise.
	* config/sparc/sparc.c (sparc_units_per_simd_word): Likewise.
	(TARGET_VECTORIZE_UNITS_PER_SIMD_WORD): Likewise.

	* tree-vect-loop.c: Replace UNITS_PER_SIMD_WORD with
	TARGET_VECTORIZE_UNITS_PER_SIMD_WORD in comments.

	* tree-vect-stmts.c (get_vectype_for_scalar_type): Replace
	UNITS_PER_SIMD_WORD with targetm.vectorize.units_per_simd_word.

	* system.h (UNITS_PER_SIMD_WORD): Poisoned.

	* config/i386/i386-protos.h (ix86_units_per_simd_word): Removed.

	* config/i386/i386.c (ix86_units_per_simd_word): Make it
	static.
	(TARGET_VECTORIZE_UNITS_PER_SIMD_WORD): New.

	* doc/tm.texi.in: Remove UNITS_PER_SIMD_WORD.  Add
	TARGET_VECTORIZE_UNITS_PER_SIMD_WORD.

	* doc/tm.texi: Regenerated.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@164285 138bc75d-0d04-0410-961f-82ee72b054a4