Replace vrp_val* with wide_ints.

This patch removes all uses of vrp_val_{min,max} in favor for a
irange_val_* which are wide_int based.  This will leave only one use
of vrp_val_* which returns trees in range_of_ssa_name_with_loop_info()
because it needs to work with non-integers (floats, etc).  In a
follow-up patch, this function will also be cleaned up such that
vrp_val_* can be deleted.

The functions min_limit and max_limit in range-op.cc are now useless
as they're basically irange_val*.  I didn't rename them yet to avoid
churn.  I'll do it in a later patch.

gcc/ChangeLog:

	* gimple-range-fold.cc (adjust_pointer_diff_expr): Rewrite with
	irange_val*.
	(vrp_val_max): New.
	(vrp_val_min): New.
	* gimple-range-op.cc (cfn_strlen::fold_range): Use irange_val_*.
	* range-op.cc (max_limit): Same.
	(min_limit): Same.
	(plus_minus_ranges): Same.
	(operator_rshift::op1_range): Same.
	(operator_cast::inside_domain_p): Same.
	* value-range.cc (vrp_val_is_max): Delete.
	(vrp_val_is_min): Delete.
	(range_tests_misc): Use irange_val_*.
	* value-range.h (vrp_val_is_min): Delete.
	(vrp_val_is_max): Delete.
	(vrp_val_max): Delete.
	(irange_val_min): New.
	(vrp_val_min): Delete.
	(irange_val_max): New.
	* vr-values.cc (check_for_binary_op_overflow): Use irange_val_*.

1 files changed, 36 insertions, 4 deletions

diff --git a/gcc/gimple-range-fold.cc b/gcc/gimple-range-fold.cc
index 62875a3..1b76e6e 100644
--- a/gcc/gimple-range-fold.cc
+++ b/gcc/gimple-range-fold.cc
@@ -360,10 +360,10 @@ adjust_pointer_diff_expr (irange &res, const gimple *diff_stmt)
       && vrp_operand_equal_p (op1, gimple_call_arg (call, 0))
       && integer_zerop (gimple_call_arg (call, 1)))
     {
-      tree max = vrp_val_max (ptrdiff_type_node);
-      unsigned prec = TYPE_PRECISION (TREE_TYPE (max));
-      wide_int wmaxm1 = wi::to_wide (max, prec) - 1;
-      res.intersect (int_range<2> (TREE_TYPE (max), wi::zero (prec), wmaxm1));
+      wide_int maxm1 = irange_val_max (ptrdiff_type_node) - 1;
+      res.intersect (int_range<2> (ptrdiff_type_node,
+				   wi::zero (TYPE_PRECISION (ptrdiff_type_node)),
+				   maxm1));
     }
 }
 
@@ -966,6 +966,38 @@ tree_upper_bound (const vrange &r, tree type)
   return NULL;
 }
 
+// Return the maximum value for TYPE.
+
+static inline tree
+vrp_val_max (const_tree type)
+{
+  if (INTEGRAL_TYPE_P (type)
+      || POINTER_TYPE_P (type))
+    return wide_int_to_tree (const_cast <tree> (type), irange_val_max (type));
+  if (frange::supports_p (type))
+    {
+      REAL_VALUE_TYPE r = frange_val_max (type);
+      return build_real (const_cast <tree> (type), r);
+    }
+  return NULL_TREE;
+}
+
+// Return the minimum value for TYPE.
+
+static inline tree
+vrp_val_min (const_tree type)
+{
+  if (INTEGRAL_TYPE_P (type)
+      || POINTER_TYPE_P (type))
+    return wide_int_to_tree (const_cast <tree> (type), irange_val_min (type));
+  if (frange::supports_p (type))
+    {
+      REAL_VALUE_TYPE r = frange_val_min (type);
+      return build_real (const_cast <tree> (type), r);
+    }
+  return NULL_TREE;
+}
+
 // If SCEV has any information about phi node NAME, return it as a range in R.
 
 void