Save 6% of GGC memory (consumed in tree-ssa-pre)

[Geoff Keating]

> 	* tree-vect-transform.c (vect_create_data_ref_ptr): Kill cast.
> 	(vect_transform_loop): Likewise.
> 	* tree-vectorizer.c (new_loop_vec_info): Likewise.
> 	(new_loop_vec_info): Likewise.
> 	(destroy_loop_vec_info): Likewise.
> 	* tree-dfa.c (create_var_ann): Use GCC_CNEW.
> 	(create_stmt_ann): Likewise.
> 	(create_tree_ann): Rename to ...
> 	(create_tree_common_ann): ... this one; allocate only the common part
> 	of annotations.
> 	* tree-vn.c (set_value_handle): Use get_tree_common_ann.
> 	(get_value_handle): Likewise.
> 	* tree-ssa-pre.c (phi_translate): Delay annotation allocation for
> 	get_tree_common_ann.
> 	* tree-vectorizer.h (set_stmt_info): Take stmt annotation.
> 	(vinfo_for_stmt): Use stmt annotations.
> 	* tree-flow.h (tree_ann_common_t): New type.
> 	(tree_common_ann, get_tree_common_ann, create_tree_common_ann): New.
> 	(tree_ann, get_tree_ann, create_tree_ann): New.
> 	* tree-flow-inline.h (get_function_ann): Do more type checking.
> 	(stmt_ann): Likewise.
> 	(tree_ann): Rename to ...
> 	(tree_common_ann): ... this one; return ony common_ann
> 	(get_tree_ann): Rename to ...
> 	(tree_common_ann): This one; return only common_ann.
> 	* tree-vect-patterns.c (vect_pattern_recog_1): Update call
> 	of set_stmt_info.

:REVIEWMAIL:

Hi Jan,

This patch is OK.

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