[COMMITTED] [range-ops] Remove specialized fold_range methods for various operators.

[Aldy Hernandez via Gcc-patches]

Remove some specialized fold_range methods that were merely setting
maybe nonzero masks, as these are now subsumed by the generic version.

gcc/ChangeLog:

        * range-op.cc (operator_mult::fold_range): Remove.
        (operator_div::fold_range): Remove.
        (operator_bitwise_and): Remove.
---
 gcc/range-op.cc | 52 -------------------------------------------------
 1 file changed, 52 deletions(-)

diff --git a/gcc/range-op.cc b/gcc/range-op.cc
index 0b01cf48fdf..6fa3b151596 100644
--- a/gcc/range-op.cc
+++ b/gcc/range-op.cc
@@ -1790,13 +1790,9 @@ cross_product_operator::wi_cross_product (irange &r, 
tree type,
 
 class operator_mult : public cross_product_operator
 {
-  using range_operator::fold_range;
   using range_operator::op1_range;
   using range_operator::op2_range;
 public:
-  virtual bool fold_range (irange &r, tree type,
-                          const irange &lh, const irange &rh,
-                          relation_trio = TRIO_VARYING) const final override;
   virtual void wi_fold (irange &r, tree type,
                        const wide_int &lh_lb,
                        const wide_int &lh_ub,
@@ -1815,18 +1811,6 @@ public:
                          relation_trio) const final override;
 } op_mult;
 
-bool
-operator_mult::fold_range (irange &r, tree type,
-                          const irange &lh, const irange &rh,
-                          relation_trio trio) const
-{
-  if (!cross_product_operator::fold_range (r, type, lh, rh, trio))
-    return false;
-
-  update_known_bitmask (r, MULT_EXPR, lh, rh);
-  return true;
-}
-
 bool
 operator_mult::op1_range (irange &r, tree type,
                          const irange &lhs, const irange &op2,
@@ -1979,23 +1963,8 @@ public:
   virtual bool wi_op_overflows (wide_int &res, tree type,
                                const wide_int &, const wide_int &)
     const final override;
-  virtual bool fold_range (irange &r, tree type,
-                          const irange &lh, const irange &rh,
-                          relation_trio trio) const final override;
 };
 
-bool
-operator_div::fold_range (irange &r, tree type,
-                         const irange &lh, const irange &rh,
-                         relation_trio trio) const
-{
-  if (!cross_product_operator::fold_range (r, type, lh, rh, trio))
-    return false;
-
-  update_known_bitmask (r, m_code, lh, rh);
-  return true;
-}
-
 bool
 operator_div::wi_op_overflows (wide_int &res, tree type,
                               const wide_int &w0, const wide_int &w1) const
@@ -2834,14 +2803,9 @@ operator_logical_and::op2_range (irange &r, tree type,
 
 class operator_bitwise_and : public range_operator
 {
-  using range_operator::fold_range;
   using range_operator::op1_range;
   using range_operator::op2_range;
 public:
-  virtual bool fold_range (irange &r, tree type,
-                          const irange &lh,
-                          const irange &rh,
-                          relation_trio rel = TRIO_VARYING) const;
   virtual bool op1_range (irange &r, tree type,
                          const irange &lhs,
                          const irange &op2,
@@ -2865,22 +2829,6 @@ private:
                                const irange &op2) const;
 } op_bitwise_and;
 
-bool
-operator_bitwise_and::fold_range (irange &r, tree type,
-                                 const irange &lh,
-                                 const irange &rh,
-                                 relation_trio) const
-{
-  if (range_operator::fold_range (r, type, lh, rh))
-    {
-      if (!r.undefined_p () && !lh.undefined_p () && !rh.undefined_p ())
-       r.set_nonzero_bits (wi::bit_and (lh.get_nonzero_bits (),
-                                        rh.get_nonzero_bits ()));
-      return true;
-    }
-  return false;
-}
-
 
 // Optimize BIT_AND_EXPR, BIT_IOR_EXPR and BIT_XOR_EXPR of signed types
 // by considering the number of leading redundant sign bit copies.
-- 
2.38.1