[interpreter] Add a register operand to ToNumber

src/interpreter/interpreter.cc

 // Copyright 2015 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.
 
 #include "src/interpreter/interpreter.h"
 
 #include <fstream>
 
 #include "src/ast/prettyprinter.h"
 #include "src/code-factory.h"
@@ skipping 979 matching lines @@
   Node* context = __ GetContext();
   Node* lhs_value = __ TruncateTaggedToWord32(context, left);
   Node* rhs_value = __ SmiToWord32(right);
   Node* shift_count = __ Word32And(rhs_value, __ Int32Constant(0x1f));
   Node* value = __ Word32Sar(lhs_value, shift_count);
   Node* result = __ ChangeInt32ToTagged(value);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
+Node* Interpreter::BuildUnaryOp(Callable callable,
+                                InterpreterAssembler* assembler) {
+  Node* target = __ HeapConstant(callable.code());
+  Node* accumulator = __ GetAccumulator();
+  Node* context = __ GetContext();
+  return __ CallStub(callable.descriptor(), target, context, accumulator);
+}
+
 void Interpreter::DoUnaryOp(Callable callable,
                             InterpreterAssembler* assembler) {
-  Node* target = __ HeapConstant(callable.code());
-  Node* accumulator = __ GetAccumulator();
-  Node* context = __ GetContext();
-  Node* result =
-      __ CallStub(callable.descriptor(), target, context, accumulator);
+  Node* result = BuildUnaryOp(callable, assembler);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
 template <class Generator>
 void Interpreter::DoUnaryOp(InterpreterAssembler* assembler) {
   Node* value = __ GetAccumulator();
   Node* context = __ GetContext();
   Node* result = Generator::Generate(assembler, value, context);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
 // ToName
 //
 // Cast the object referenced by the accumulator to a name.
 void Interpreter::DoToName(InterpreterAssembler* assembler) {
   DoUnaryOp(CodeFactory::ToName(isolate_), assembler);
 }
 
 // ToNumber
 //
 // Cast the object referenced by the accumulator to a number.
 void Interpreter::DoToNumber(InterpreterAssembler* assembler) {
-  DoUnaryOp(CodeFactory::ToNumber(isolate_), assembler);
+  Node* result = BuildUnaryOp(CodeFactory::ToNumber(isolate_), assembler);
+  __ StoreRegister(result, __ BytecodeOperandReg(0));
+  __ Dispatch();
 }
 
 // ToObject
 //
 // Cast the object referenced by the accumulator to a JSObject.
 void Interpreter::DoToObject(InterpreterAssembler* assembler) {
   DoUnaryOp(CodeFactory::ToObject(isolate_), assembler);
 }
 
 // Inc
@@ skipping 1078 matching lines @@
   __ StoreObjectField(generator, JSGeneratorObject::kContinuationOffset,
       __ SmiTag(new_state));
   __ SetAccumulator(old_state);
 
   __ Dispatch();
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8