[turbofan] Unify BooleanToNumber, StringToNumber and PlainPrimitiveToNumber.

src/compiler/simplified-operator.h

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_SIMPLIFIED_OPERATOR_H_
 #define V8_COMPILER_SIMPLIFIED_OPERATOR_H_
 
 #include <iosfwd>
 
 #include "src/compiler/type-hints.h"
@@ skipping 140 matching lines @@
 
 // Boolean values can be:
 //   - Bool: a tagged pointer to either the canonical JS #false or
 //           the canonical JS #true object
 //   - Bit: an untagged integer 0 or 1, but word-sized
 class SimplifiedOperatorBuilder final : public ZoneObject {
  public:
   explicit SimplifiedOperatorBuilder(Zone* zone);
 
   const Operator* BooleanNot();
-  const Operator* BooleanToNumber();
 
   const Operator* NumberEqual();
   const Operator* NumberLessThan();
   const Operator* NumberLessThanOrEqual();
   const Operator* NumberAdd();
   const Operator* NumberSubtract();
   const Operator* NumberMultiply();
   const Operator* NumberDivide();
   const Operator* NumberModulus();
   const Operator* NumberBitwiseOr();
@@ skipping 48 matching lines @@
   const Operator* SpeculativeNumberLessThanOrEqual(
       CompareOperationHints::Hint hint);
   const Operator* SpeculativeNumberEqual(CompareOperationHints::Hint hint);
 
   const Operator* ReferenceEqual(Type* type);
 
   const Operator* StringEqual();
   const Operator* StringLessThan();
   const Operator* StringLessThanOrEqual();
   const Operator* StringFromCharCode();
-  const Operator* StringToNumber();
 
   const Operator* PlainPrimitiveToNumber();
   const Operator* PlainPrimitiveToWord32();
   const Operator* PlainPrimitiveToFloat64();
 
   const Operator* ChangeTaggedSignedToInt32();
   const Operator* ChangeTaggedToInt32();
   const Operator* ChangeTaggedToUint32();
   const Operator* ChangeTaggedToFloat64();
   const Operator* ChangeInt31ToTaggedSigned();
@@ skipping 54 matching lines @@
   Zone* const zone_;
 
   DISALLOW_COPY_AND_ASSIGN(SimplifiedOperatorBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_SIMPLIFIED_OPERATOR_H_