GCC: tree-data-ref.h, 1.1.1.1 -> 1.2

[Jan-Benedict Glaw]

Update of /mnt/vax-development/CVS_Repository/gcc/gcc
In directory mail:/mnt/vax-development/local_work/work-jbglaw/local-cvs/gcc/gcc

Modified Files:
	tree-data-ref.h 
Log Message:
- - - -- -- A U T O M A T I C   C H E C K I N -- -- - - -
	* tree-vectorizer.c: New File: loop vectorization on SSAed GIMPLE trees.
	* tree-vectorizer.h: New File: Same.
	* Makefile.in (tree-vectorizer.c, tree-vectorizer.h): Add new files.
	* common.opt (ftree-vectorize): New flag to enable vectorization.
	* timevar.def (TV_TREE_VECTORIZATION): New dump file for vectorization
	pass.
	* tree-data-ref.h (init_data_ref): Additional argument.
	(array_base_name_differ_p): Moved to tree-data-ref.c.
	* tree-data-ref.c (array_base_name_differ_p): Revised.
	(initialize_data_dependence_relation): Call array_base_name_differ_p
	with an extra argument.
	(analyze_all_data_dependences): Same.
	(init_data_ref): Additional argument is_read to set DR_IS_READ.
	* tree-ssa-phiopt.c (empty_block_p): Expose for usage out of this file.
	* tree-flow.h (vectorize_loops, empty_block_p): Add declaration.
	* tree-optimize.c (pass_vectorize): Schedule the vectorization pass.
	* tree-pass.h (tree_opt_pass pass_vectorize): Declare the new
	vectorization pass.
	* tree-ssa-loop.c (tree_ssa_loop_init): Call scev_initialize.
	(tree_ssa_loop_done): Call scev_finalize.
	(tree_vectorize): Define the new vectorization pass.
	* defaults.h (UNITS_PER_SIMD_WORD): Allow targets to specify the size of
	the vector they support (until support for multiple vector sizes is
	added to the vectorizer).
	* config/i386/i386.h (UNITS_PER_SIMD_WORD): Define.
	* config/rs6000/rs6000.h (UNITS_PER_SIMD_WORD): Define.
	* invoke.texi (fdump-tree-vect, ftree-vectorize): Add
	documentation.