[COMMITTED] Add op1_op2_relation for float operands.

[COMMITTED] Add op1_op2_relation for float operands.

[Aldy Hernandez]

op1_op2_relation can be called for relops (bool = a < b) as well as
regular binary operators (z = a + b).  This patch adds the overloaded
method for floating point results.

gcc/ChangeLog:

	* range-op-float.cc (range_operator_float::op1_op2_relation): New.
	(class foperator_equal): Add using.
	(class foperator_not_equal): Same.
	(class foperator_lt): Same.
	(class foperator_le): Same.
	(class foperator_gt): Same.
	(class foperator_ge): Same.
	* range-op.cc (range_op_handler::op1_op2_relation): New.
	* range-op.h (range_operator_float::op1_op2_relation): New.
---
 gcc/range-op-float.cc | 12 ++++++++++++
 gcc/range-op.cc       |  4 +++-
 gcc/range-op.h        |  1 +
 3 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/gcc/range-op-float.cc b/gcc/range-op-float.cc
index 229b9d23351..23e0f5ef4e2 100644
--- a/gcc/range-op-float.cc
+++ b/gcc/range-op-float.cc
@@ -160,6 +160,12 @@ range_operator_float::op1_op2_relation (const irange &lhs ATTRIBUTE_UNUSED) cons
   return VREL_VARYING;
 }
 
+relation_kind
+range_operator_float::op1_op2_relation (const frange &lhs ATTRIBUTE_UNUSED) const
+{
+  return VREL_VARYING;
+}
+
 // Return TRUE if OP1 is known to be free of NANs.
 
 static inline bool
@@ -338,6 +344,7 @@ class foperator_equal : public range_operator_float
   using range_operator_float::fold_range;
   using range_operator_float::op1_range;
   using range_operator_float::op2_range;
+  using range_operator_float::op1_op2_relation;
 public:
   bool fold_range (irange &r, tree type,
 		   const frange &op1, const frange &op2,
@@ -444,6 +451,7 @@ class foperator_not_equal : public range_operator_float
 {
   using range_operator_float::fold_range;
   using range_operator_float::op1_range;
+  using range_operator_float::op1_op2_relation;
 public:
   bool fold_range (irange &r, tree type,
 		   const frange &op1, const frange &op2,
@@ -545,6 +553,7 @@ class foperator_lt : public range_operator_float
   using range_operator_float::fold_range;
   using range_operator_float::op1_range;
   using range_operator_float::op2_range;
+  using range_operator_float::op1_op2_relation;
 public:
   bool fold_range (irange &r, tree type,
 		   const frange &op1, const frange &op2,
@@ -660,6 +669,7 @@ class foperator_le : public range_operator_float
   using range_operator_float::fold_range;
   using range_operator_float::op1_range;
   using range_operator_float::op2_range;
+  using range_operator_float::op1_op2_relation;
 public:
   bool fold_range (irange &r, tree type,
 		   const frange &op1, const frange &op2,
@@ -767,6 +777,7 @@ class foperator_gt : public range_operator_float
   using range_operator_float::fold_range;
   using range_operator_float::op1_range;
   using range_operator_float::op2_range;
+  using range_operator_float::op1_op2_relation;
 public:
   bool fold_range (irange &r, tree type,
 		   const frange &op1, const frange &op2,
@@ -882,6 +893,7 @@ class foperator_ge : public range_operator_float
   using range_operator_float::fold_range;
   using range_operator_float::op1_range;
   using range_operator_float::op2_range;
+  using range_operator_float::op1_op2_relation;
 public:
   bool fold_range (irange &r, tree type,
 		   const frange &op1, const frange &op2,
diff --git a/gcc/range-op.cc b/gcc/range-op.cc
index 16fa1f4f46d..f8255dd10a1 100644
--- a/gcc/range-op.cc
+++ b/gcc/range-op.cc
@@ -4476,7 +4476,9 @@ range_op_handler::op1_op2_relation (const vrange &lhs) const
   gcc_checking_assert (m_valid);
   if (m_int)
     return m_int->op1_op2_relation (as_a <irange> (lhs));
-  return m_float->op1_op2_relation (as_a <irange> (lhs));
+  if (is_a <irange> (lhs))
+    return m_float->op1_op2_relation (as_a <irange> (lhs));
+  return m_float->op1_op2_relation (as_a <frange> (lhs));
 }
 
 // Cast the range in R to TYPE.
diff --git a/gcc/range-op.h b/gcc/range-op.h
index b2f063afb07..48adcecc7c6 100644
--- a/gcc/range-op.h
+++ b/gcc/range-op.h
@@ -160,6 +160,7 @@ public:
 					  const frange &op2,
 					  relation_kind = VREL_VARYING) const;
   virtual relation_kind op1_op2_relation (const irange &lhs) const;
+  virtual relation_kind op1_op2_relation (const frange &lhs) const;
 };
 
 class range_op_handler
-- 
2.37.3