2005-06-01  Diego Novillo  <dnovillo@redhat.com>

	PR 14341, PR 21332, PR 20701, PR 21029, PR 21086, PR 21090
	PR 21289, PR 21348, PR 21367, PR 21368, PR 21458.
	* fold-const.c (invert_tree_comparison): Make extern.
	* tree-flow.h (enum value_range_type): Move to tree-ssa-propagate.
	(struct value_range_def): Limewise.
	(get_value_range): Remove.
	(dump_value_range): Remove.
	(dump_all_value_ranges): Remove.
	(debug_all_value_ranges): Remove.
	(vrp_evaluate_conditional): Declare.
	* tree-ssa-propagate.c (struct prop_stats_d): Add field
	num_pred_folded.
	(substitute_and_fold): Add argument use_ranges_p.
	Update all callers.
	If use_ranges_p is true, call fold_predicate_in to fold
	predicates using range information.
	Ignore ASSERT_EXPRs.
	Change debugging output to only show statements that have been
	folded.
	(replace_phi_args_in): Move debugging output code from
	substitute and fold.
	(fold_predicate_in): New local function.
	* tree-ssa-propagate.h (enum value_range_type): Move from
	tree-flow.h.
	(struct value_range_d): Likewise.
	Add field 'equiv'.
	(value_range_t): Rename from value_range.
	* tree-vrp.c (found_in_subgraph): Rename from found.
	(get_opposite_operand): Remove.
	(struct assert_locus_d): Declare.
	(assert_locus_t): Declare.
	(need_assert_for): Declare.
	(asserts_for): Declare.
	(blocks_visited): Declare.
	(vr_value): Declare.
	(set_value_range): Add argument 'equiv'.
	Don't drop to VARYING ranges that cover all values in the
	type.
	Make deep copy of equivalence set 'equiv'.
	(copy_value_range): New local function.
	(set_value_range_to_undefined): New local function.
	(compare_values): Return -2 if either value has overflowed.
	(range_includes_zero_p): New local function.
	(extract_range_from_assert): Flip the predicate code if the
	name being asserted is on the RHS of the predicate.
	Avoid creating unnecessary symbolic ranges if the comparison
	includes another name with a known numeric range.
	Update the equivalnce set of the new range when asserting
	EQ_EXPR predicates.
	(extract_range_from_ssa_name): Update the equivalence set of
	the new range with VAR.
	(extract_range_from_binary_expr): Also handle TRUTH_*_EXPR.
	If -fwrapv is used, set the resulting range to VARYING if the
	operation overflows.  Otherwise, use TYPE_MIN_VALUE and
	TYPE_MAX_VALUE to represent -INF and +INF.
	Fix handling of *_DIV_EXPR.
	(extract_range_from_unary_expr): Handle MINUS_EXPR and
	ABS_EXPR properly by switching the range around if necessary.
	(extract_range_from_comparison): New local function.
	(extract_range_from_expr): Call it.
	(adjust_range_with_scev): Do not adjust the range if using
	wrapping arithmetic (-fwrapv).
	(dump_value_range): Also show equivalence set.
	Show -INF and +INF for TYPE_MIN_VALUE and TYPE_MAX_VALUE.
	(build_assert_expr_for): Also build ASSERT_EXPR for EQ_EXPR.
	(infer_value_range): Change return value to bool.
	Add arguments 'comp_code_p' and 'val_p'.
	Do not attempt to infer ranges from statements that may throw.
	Store the comparison code in comp_code_p.
	Store the other operand to be used in the predicate in val_p.
	(dump_asserts_for): New.
	(debug_asserts_for): New.
	(dump_all_asserts): New.
	(debug_all_asserts): New.
	(register_new_assert_for): New.
	(register_edge_assert_for): New.
	(find_conditional_asserts): New.
	(find_assert_locations): New.
	(process_assert_insertions_for): New.
	(process_assert_insertions): New.
	(insert_range_assertions): Initialize found_in_subgraph,
	blocks_visited, need_assert_for and asserts_for.
	Call find_assert_locations and process_assert_insertions.
	(remove_range_assertions): Add more documentation.
	(vrp_initialize): Change return type to void.
	Do not try to guess if running VRP is worth it.
	(compare_name_with_value): New.
	(compare_names): New.
	(vrp_evaluate_conditional): Add argument 'use_equiv_p'.  If
	use_equiv_p is true, call compare_names and
	compare_name_with_value to compare all the ranges for every
	name in the equivalence set of the predicate operands.
	Update all callers.
	(vrp_meet): Try harder not to derive a VARYING range.
	If two values meet, the resulting equivalence set is the
	intersection of the two equivalence sets.
	(vrp_visit_phi_node): Call copy_value_range to get the current
	range information of the LHS.
	(vrp_finalize): Create a value vector representing all the
	names that ended up with exactly one value in their range.
	Call substitute_and_fold.
	(execute_vrp): Document equivalence sets in ranges.
	* tree.h (SSA_NAME_VALUE_RANGE): Remove.
	(struct tree_ssa_name): Remove field value_range.
	(invert_tree_comparison): Declare.

testsuite/ChangeLog

2005-06-01  Diego Novillo  <dnovillo@redhat.com>

	PR 14341, PR 21332, PR 20701, PR 21086, PR 21090
	PR 21289, PR 21348, PR 21367, PR 21368, PR 21458.
	* gcc.dg/tree-ssa/pr14341.c: New test.
	* gcc.dg/tree-ssa/pr14841.c: New test.
	* gcc.dg/tree-ssa/pr20701.c: New test.
	* gcc.dg/tree-ssa/pr21086.c: New test.
	* gcc.dg/tree-ssa/pr21090.c: New test.
	* gcc.dg/tree-ssa/pr21332.c: New test.
	* gcc.dg/tree-ssa/pr21458.c: New test.
	* gcc.dg/tree-ssa/pr21658.c: New test.
	* gcc.dg/tree-ssa/vrp01.c: New test.
	* gcc.dg/tree-ssa/vrp02.c: New test.
	* gcc.dg/tree-ssa/vrp03.c: New test.
	* gcc.dg/tree-ssa/vrp04.c: New test.
	* gcc.dg/tree-ssa/vrp05.c: New test.
	* gcc.dg/tree-ssa/vrp06.c: New test.
	* gcc.dg/tree-ssa/vrp07.c: New test.
	* gcc.dg/tree-ssa/vrp08.c: New test.
	* gcc.dg/tree-ssa/vrp09.c: New test.
	* gcc.dg/tree-ssa/vrp10.c: New test.
	* gcc.dg/tree-ssa/vrp11.c: New test.
	* gcc.dg/tree-ssa/vrp12.c: New test.
	* gcc.dg/tree-ssa/vrp13.c: New test.

2005-06-01  Alexandre Oliva  <aoliva@redhat.com>

	PR 21029
	* gcc.dg/tree-ssa/pr21029.c: New test.

From-SVN: r100478