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

src/interpreter/bytecodes.h

 // 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.
 
 #ifndef V8_INTERPRETER_BYTECODES_H_
 #define V8_INTERPRETER_BYTECODES_H_
 
 #include <iosfwd>
 
 // Clients of this interface shouldn't depend on lots of interpreter internals.
@@ skipping 25 matching lines @@
   /* Loading the accumulator */                                            \
   V(LdaZero, OperandType::kNone)                                           \
   V(LdaSmi8, OperandType::kImm8)                                           \
   V(LdaConstant, OperandType::kIdx)                                        \
   V(LdaUndefined, OperandType::kNone)                                      \
   V(LdaNull, OperandType::kNone)                                           \
   V(LdaTheHole, OperandType::kNone)                                        \
   V(LdaTrue, OperandType::kNone)                                           \
   V(LdaFalse, OperandType::kNone)                                          \
                                                                            \
-  /* Load globals */                                                       \
+  /* Globals */                                                            \
   V(LdaGlobal, OperandType::kIdx)                                          \
+  V(StaGlobal, OperandType::kIdx)                                          \
+                                                                           \
+  /* Context operations */                                                 \
+  V(LdaContextSlot, OperandType::kReg, OperandType::kIdx)                  \
                                                                            \
   /* Register-accumulator transfers */                                     \
   V(Ldar, OperandType::kReg)                                               \
   V(Star, OperandType::kReg)                                               \
                                                                            \
   /* LoadIC operations */                                                  \
   V(LoadIC, OperandType::kReg, OperandType::kIdx)                          \
   V(KeyedLoadIC, OperandType::kReg, OperandType::kIdx)                     \
                                                                            \
   /* StoreIC operations */                                                 \
@@ skipping 88 matching lines @@
   int index() const {
     DCHECK(index_ != kIllegalIndex);
     return index_;
   }
   bool is_parameter() const { return index() < 0; }
 
   static Register FromParameterIndex(int index, int parameter_count);
   int ToParameterIndex(int parameter_count) const;
   static int MaxParameterIndex();
 
+  // Returns the register for the function's outer context.
+  static Register function_context();
+  bool is_function_context() const;
+
   static Register FromOperand(uint8_t operand);
   uint8_t ToOperand() const;
 
  private:
   static const int kIllegalIndex = kMaxInt;
 
   void* operator new(size_t size);
   void operator delete(void* p);
 
   int index_;
@@ skipping 45 matching lines @@
 };
 
 std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode);
 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type);
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODES_H_