[turbofan] Introduce a SpeculativeToNumber operator.

src/compiler/operation-typer.h

 // Copyright 2016 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_OPERATION_TYPER_H_
 #define V8_COMPILER_OPERATION_TYPER_H_
 
 #include "src/base/flags.h"
 #include "src/compiler/opcodes.h"
 
@@ skipping 21 matching lines @@
 
   Type* ToPrimitive(Type* type);
 
   // Helpers for number operation typing.
   Type* ToNumber(Type* type);
   Type* WeakenRange(Type* current_range, Type* previous_range);
 
 // Number unary operators.
 #define DECLARE_METHOD(Name) Type* Name(Type* type);
   SIMPLIFIED_NUMBER_UNOP_LIST(DECLARE_METHOD)
+  SIMPLIFIED_SPECULATIVE_NUMBER_UNOP_LIST(DECLARE_METHOD)
 #undef DECLARE_METHOD
 
 // Number binary operators.
 #define DECLARE_METHOD(Name) Type* Name(Type* lhs, Type* rhs);
   SIMPLIFIED_NUMBER_BINOP_LIST(DECLARE_METHOD)
   SIMPLIFIED_SPECULATIVE_NUMBER_BINOP_LIST(DECLARE_METHOD)
 #undef DECLARE_METHOD
 
   Type* TypeTypeGuard(const Operator* sigma_op, Type* input);
 
@@ skipping 33 matching lines @@
   Type* singleton_the_hole_;
   Type* signed32ish_;
   Type* unsigned32ish_;
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPERATION_TYPER_H_