[Interpreter] Add support for global declarations and load/store of global variables

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 223 matching lines @@
 BytecodeArrayBuilder& BytecodeArrayBuilder::LoadGlobal(int slot_index) {
   DCHECK(slot_index >= 0);
   if (FitsInIdx8Operand(slot_index)) {
     Output(Bytecode::kLdaGlobal, static_cast<uint8_t>(slot_index));
   } else {
     UNIMPLEMENTED();
   }
   return *this;
 }
 
+
+BytecodeArrayBuilder& BytecodeArrayBuilder::StoreGlobal(
+    int slot_index, LanguageMode language_mode) {
+  if (!is_sloppy(language_mode)) {
+    UNIMPLEMENTED();
+  }
+  DCHECK(slot_index >= 0);
+  if (FitsInIdx8Operand(slot_index)) {
+    Output(Bytecode::kStaGlobal, static_cast<uint8_t>(slot_index));
+  } else {
+    UNIMPLEMENTED();
+  }
+  return *this;
+}
+
+
+BytecodeArrayBuilder& BytecodeArrayBuilder::LoadContextSlot(Register context,
+                                                            int slot_index) {
+  DCHECK(slot_index >= 0);
+  if (FitsInIdx8Operand(slot_index)) {
+    Output(Bytecode::kLdaContextSlot, context.ToOperand(),
+           static_cast<uint8_t>(slot_index));
+  } else {
+    UNIMPLEMENTED();
+  }
+  return *this;
+}
+
+
 BytecodeArrayBuilder& BytecodeArrayBuilder::LoadNamedProperty(
     Register object, int feedback_slot, LanguageMode language_mode) {
   Bytecode bytecode = BytecodeForLoadIC(language_mode);
   if (FitsInIdx8Operand(feedback_slot)) {
     Output(bytecode, object.ToOperand(), static_cast<uint8_t>(feedback_slot));
   } else {
     UNIMPLEMENTED();
   }
   return *this;
 }
@@ skipping 281 matching lines @@
     case OperandType::kNone:
       return false;
     case OperandType::kIdx16:
       return static_cast<uint16_t>(operand_value) == operand_value;
     case OperandType::kCount8:
     case OperandType::kImm8:
     case OperandType::kIdx8:
       return static_cast<uint8_t>(operand_value) == operand_value;
     case OperandType::kReg8: {
       Register reg = Register::FromOperand(static_cast<uint8_t>(operand_value));
-      if (reg.is_parameter()) {
+      if (reg.is_function_context()) {
+        return true;
+      } else if (reg.is_parameter()) {
         int parameter_index = reg.ToParameterIndex(parameter_count_);
         return parameter_index >= 0 && parameter_index < parameter_count_;
       } else {
         return (reg.index() >= 0 && reg.index() < temporary_register_next_);
       }
     }
   }
   UNREACHABLE();
   return false;
 }
@@ skipping 157 matching lines @@
 
 Register TemporaryRegisterScope::NewRegister() {
   count_++;
   last_register_index_ = builder_->BorrowTemporaryRegister();
   return Register(last_register_index_);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8