[intrinsic] Drop the %_ValueOf intrinsic.

src/code-stub-assembler.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_CODE_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include <functional>
 
 #include "src/compiler/code-assembler.h"
 #include "src/objects.h"
 
 namespace v8 {
 namespace internal {
 
 class CallInterfaceDescriptor;
 class StatsCounter;
 class StubCache;
 
+enum class PrimitiveType { kBoolean, kNumber, kString, kSymbol };
+
 // Provides JavaScript-specific "macro-assembler" functionality on top of the
 // CodeAssembler. By factoring the JavaScript-isms out of the CodeAssembler,
 // it's possible to add JavaScript-specific useful CodeAssembler "macros"
 // without modifying files in the compiler directory (and requiring a review
 // from a compiler directory OWNER).
 class CodeStubAssembler : public compiler::CodeAssembler {
  public:
   // Create with CallStub linkage.
   // |result_size| specifies the number of results returned by the stub.
   // TODO(rmcilroy): move result_size to the CallInterfaceDescriptor.
@@ skipping 214 matching lines @@
   // Conversions.
   compiler::Node* ChangeFloat64ToTagged(compiler::Node* value);
   compiler::Node* ChangeInt32ToTagged(compiler::Node* value);
   compiler::Node* ChangeUint32ToTagged(compiler::Node* value);
 
   // Type conversions.
   // Throws a TypeError for {method_name} if {value} is not coercible to Object,
   // or returns the {value} converted to a String otherwise.
   compiler::Node* ToThisString(compiler::Node* context, compiler::Node* value,
                                char const* method_name);
+  // Throws a TypeError for {method_name} if {value} is neither of the given
+  // {primitive_type} nor a JSValue wrapping a value of {primitive_type}, or
+  // returns the {value} (or wrapped value) otherwise.
+  compiler::Node* ToThisValue(compiler::Node* context, compiler::Node* value,
+                              PrimitiveType primitive_type,
+                              char const* method_name);
 
   // String helpers.
   // Load a character from a String (might flatten a ConsString).
   compiler::Node* StringCharCodeAt(compiler::Node* string,
                                    compiler::Node* smi_index);
   // Return the single character string with only {code}.
   compiler::Node* StringFromCharCode(compiler::Node* code);
 
   // Returns a node that is true if the given bit is set in |word32|.
   template <typename T>
@@ skipping 198 matching lines @@
                                        AllocationFlags flags,
                                        compiler::Node* top_adddress,
                                        compiler::Node* limit_address);
 
   static const int kElementLoopUnrollThreshold = 8;
 };
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_