2006-02-06  Daniel Berlin  <dberlin@dberlin.org>

	* tree-ssa-pre.c (bb_value_sets_t): Add antic_safe_loads.
	(ANTIC_SAFE_LOADS): New macro.
	(find_or_generate_expression): Add prototype.
	(set_contains_value): Allow null set for sake of not always having
	to allocate ANTIC_SAFE_LOADS.
	(phi_translate): Move placement of AGGREGATE_TYPE_P check.
	Allow COMPONENT_REF too.
	(valid_in_set): Allow COMPONENT_REF.
	Check ANTIC_SAFE_LOADS too.
	(compute_antic_aux): Print out ANTIC_SAFE_LOADS.
	(compute_rvuse_and_antic_safe): Add ANTIC_SAFE computation, and
	rename.
	(can_PRE_operation): Add COMPONENT_REF.
	(create_component_ref_by_pieces): New function.
	(create_expression_by_pieces): Use create_component_ref_by_pieces.
	(insert_aux): Move AGGREGATE_TYPE_P check here.
	(compute_avail): Set bb local stmt uids.
	(pass_pre): Use TODO_update_ssa_only_virtuals.

2006-02-06  Daniel Berlin  <dberlin@dberlin.org>

	* gcc.dg/tree-ssa/loadpre10.c: New test.
	* gcc.dg/tree-ssa/loadpre11.c: Ditto.
	* gcc.dg/tree-ssa/loadpre6.c: Expect one more elimination.
	* gcc.dg/tree-ssa/loadpre4.c: This should pass now.

From-SVN: r110644