[Interpreter] Add support for cast operators to bytecode graph builder and

src/compiler/bytecode-graph-builder.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/compiler/bytecode-graph-builder.h"
 
 #include "src/compiler/linkage.h"
 #include "src/compiler/operator-properties.h"
 #include "src/interpreter/bytecode-array-iterator.h"
 
@@ skipping 980 matching lines @@
   UNIMPLEMENTED();
 }
 
 
 void BytecodeGraphBuilder::VisitTestInstanceOf(
     const interpreter::BytecodeArrayIterator& iterator) {
   UNIMPLEMENTED();
 }
 
 
+void BytecodeGraphBuilder::BuildCastOperator(
+    const Operator* js_op, const interpreter::BytecodeArrayIterator& iterator) {
+  Node* node = NewNode(js_op, environment()->LookupAccumulator());
+  AddEmptyFrameStateInputs(node);
+  environment()->BindAccumulator(node);
+}
+
+
 void BytecodeGraphBuilder::VisitToBoolean(
     const interpreter::BytecodeArrayIterator& iterator) {
-  UNIMPLEMENTED();
+  BuildCastOperator(javascript()->ToBoolean(), iterator);
 }
 
 
 void BytecodeGraphBuilder::VisitToName(
     const interpreter::BytecodeArrayIterator& iterator) {
-  UNIMPLEMENTED();
+  BuildCastOperator(javascript()->ToName(), iterator);
 }
 
 
 void BytecodeGraphBuilder::VisitToNumber(
     const interpreter::BytecodeArrayIterator& iterator) {
-  UNIMPLEMENTED();
+  BuildCastOperator(javascript()->ToNumber(), iterator);
 }
 
 
 void BytecodeGraphBuilder::VisitToObject(
     const interpreter::BytecodeArrayIterator& iterator) {
-  UNIMPLEMENTED();
+  BuildCastOperator(javascript()->ToObject(), iterator);
 }
 
 
 void BytecodeGraphBuilder::VisitJump(
     const interpreter::BytecodeArrayIterator& iterator) {
   UNIMPLEMENTED();
 }
 
 
 void BytecodeGraphBuilder::VisitJumpConstant(
@@ skipping 196 matching lines @@
 
 void BytecodeGraphBuilder::UpdateControlDependencyToLeaveFunction(Node* exit) {
   if (environment()->IsMarkedAsUnreachable()) return;
   environment()->MarkAsUnreachable();
   exit_controls_.push_back(exit);
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8