[Interpreter] Add support for loading globals in the interpreter.

src/interpreter/bytecode-array-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/interpreter/bytecode-array-builder.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
@@ skipping 134 matching lines @@
 }
 
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::StoreAccumulatorInRegister(
     Register reg) {
   Output(Bytecode::kStar, reg.ToOperand());
   return *this;
 }
 
 
+BytecodeArrayBuilder& BytecodeArrayBuilder::LoadGlobal(int slot_index) {
+  DCHECK(slot_index >= 0);
+  if (FitsInByteOperand(slot_index)) {
+    Output(Bytecode::kLdaGlobal, static_cast<uint8_t>(slot_index));
+  } else {
+    UNIMPLEMENTED();
+  }
+  return *this;
+}
+
 BytecodeArrayBuilder& BytecodeArrayBuilder::LoadNamedProperty(
     Register object, int feedback_slot, LanguageMode language_mode) {
   if (!is_sloppy(language_mode)) {
     UNIMPLEMENTED();
   }
 
   if (FitsInByteOperand(feedback_slot)) {
     Output(Bytecode::kLoadIC, object.ToOperand(),
            static_cast<uint8_t>(feedback_slot));
   } else {
@@ skipping 217 matching lines @@
 
 Register TemporaryRegisterScope::NewRegister() {
   count_++;
   last_register_index_ = builder_->BorrowTemporaryRegister();
   return Register(last_register_index_);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8