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

src/compiler/bytecode-graph-builder.cc

Index: src/compiler/bytecode-graph-builder.cc
diff --git a/src/compiler/bytecode-graph-builder.cc b/src/compiler/bytecode-graph-builder.cc
index 5bb208ce94f7e5d8a2550d24cb9d0a1f4268c29b..a9720418caecb1f367ef9915512efbc3f77d58f4 100644
--- a/src/compiler/bytecode-graph-builder.cc
+++ b/src/compiler/bytecode-graph-builder.cc
@@ -998,27 +998,35 @@ void BytecodeGraphBuilder::VisitTestInstanceOf(
 }
 
 
+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);
 }