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Used signed infinities in VRP. 

* tree-vrp.c (uses_overflow_infinity): New static function.
	(supports_overflow_infinity): New static function.
	(make_overflow_infinity): New static function.
	(negative_overflow_infinity): New static function.
	(positive_overflow_infinity): New static function.
	(is_negative_overflow_infinity): New static function.
	(is_positive_overflow_infinity): New static function.
	(is_overflow_infinity): New static function.
	(overflow_infinity_range_p): New static function.
	(compare_values_warnv): New function split out of compare_values.
	(compare_value): Call it.
	(set_value_range_to_nonnegative): Add overflow_infinity
	parameter.  Change caller.
	(vrp_expr_computes_nonnegative): Add strict_overflow_p parameter.
	Change callers.
	(vrp_expr_computes_nonzero): Likewise.
	(compare_ranges, compare_range_with_value): Likewise.
	(compare_name_with_value, compare_names): Likewise.
	(vrp_evaluate_conditional): Likewise.
	(set_value_range): Handle infinity
	(vrp_operand_equal_p, operand_less_p): Likewise.
	(extract_range_from_assert): Likewise.
	(vrp_int_const_binop): Likewise.
	(extract_range_from_binary_expr): Likewise.
	(extract_range_from_unary_expr): Likewise.
	(extract_range_from_comparison): Likewise.
	(extract_range_from_expr): Likewise.
	(dump_value_range): Likewise.
	(vrp_visit_cond_stmt, vrp_visit_phi_node): Likewise.
	(test_for_singularity): Likewise.
	(vrp_int_const_binop): Remove inline qualifier.
	(adjust_range_with_scev): Add comment.
	* tree-flow.h (vrp_evaluate_conditional): Update declaration.

From-SVN: r122487
This commit is contained in:
Ian Lance Taylor 2007-03-02 20:09:31 +00:00 committed by Ian Lance Taylor
parent 386e9d408b
commit 12df8a7eb6
4 changed files with 788 additions and 203 deletions
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37
gcc/ChangeLog
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@ -1,3 +1,40 @@
2007-03-03 Ian Lance Taylor <iant@google.com>
Used signed infinities in VRP.
* tree-vrp.c (uses_overflow_infinity): New static function.
(supports_overflow_infinity): New static function.
(make_overflow_infinity): New static function.
(negative_overflow_infinity): New static function.
(positive_overflow_infinity): New static function.
(is_negative_overflow_infinity): New static function.
(is_positive_overflow_infinity): New static function.
(is_overflow_infinity): New static function.
(overflow_infinity_range_p): New static function.
(compare_values_warnv): New function split out of compare_values.
(compare_value): Call it.
(set_value_range_to_nonnegative): Add overflow_infinity
parameter. Change caller.
(vrp_expr_computes_nonnegative): Add strict_overflow_p parameter.
Change callers.
(vrp_expr_computes_nonzero): Likewise.
(compare_ranges, compare_range_with_value): Likewise.
(compare_name_with_value, compare_names): Likewise.
(vrp_evaluate_conditional): Likewise.
(set_value_range): Handle infinity
(vrp_operand_equal_p, operand_less_p): Likewise.
(extract_range_from_assert): Likewise.
(vrp_int_const_binop): Likewise.
(extract_range_from_binary_expr): Likewise.
(extract_range_from_unary_expr): Likewise.
(extract_range_from_comparison): Likewise.
(extract_range_from_expr): Likewise.
(dump_value_range): Likewise.
(vrp_visit_cond_stmt, vrp_visit_phi_node): Likewise.
(test_for_singularity): Likewise.
(vrp_int_const_binop): Remove inline qualifier.
(adjust_range_with_scev): Add comment.
* tree-flow.h (vrp_evaluate_conditional): Update declaration.
2007-03-02 Diego Novillo <dnovillo@redhat.com>
* tree-ssa-structalias.c (could_have_pointers): Tidy.

2
gcc/tree-flow.h
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@ -776,7 +776,7 @@ bool fold_stmt_inplace (tree);
tree widen_bitfield (tree, tree, tree);
/* In tree-vrp.c */
tree vrp_evaluate_conditional (tree, bool);
tree vrp_evaluate_conditional (tree, bool, bool *);
void simplify_stmt_using_ranges (tree);
/* In tree-ssa-dom.c */

4
gcc/tree-ssa-propagate.c
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@ -1100,6 +1100,7 @@ fold_predicate_in (tree stmt)
tree *pred_p = NULL;
bool modify_stmt_p = false;
tree val;
bool sop;
if (TREE_CODE (stmt) == GIMPLE_MODIFY_STMT
&& COMPARISON_CLASS_P (GIMPLE_STMT_OPERAND (stmt, 1)))
@ -1112,7 +1113,8 @@ fold_predicate_in (tree stmt)
else
return false;
val = vrp_evaluate_conditional (*pred_p, true);
sop = false;
val = vrp_evaluate_conditional (*pred_p, true, &sop);
if (val)
{
if (modify_stmt_p)

948
gcc/tree-vrp.c
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