[ignition] Add bytecodes for loads/stores in the current context

src/interpreter/interpreter.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/interpreter.h"
 
 #include <fstream>
 #include <memory>
 
 #include "src/ast/prettyprinter.h"
@@ skipping 526 matching lines @@
 compiler::Node* Interpreter::BuildLoadContextSlot(
     InterpreterAssembler* assembler) {
   Node* reg_index = __ BytecodeOperandReg(0);
   Node* context = __ LoadRegister(reg_index);
   Node* slot_index = __ BytecodeOperandIdx(1);
   Node* depth = __ BytecodeOperandUImm(2);
   Node* slot_context = __ GetContextAtDepth(context, depth);
   return __ LoadContextSlot(slot_context, slot_index);
 }
 
+compiler::Node* Interpreter::BuildLoadCurrentContextSlot(
+    InterpreterAssembler* assembler) {
+  Node* slot_index = __ BytecodeOperandIdx(0);
+  Node* slot_context = __ GetContext();
+  return __ LoadContextSlot(slot_context, slot_index);
+}
+
 // LdaContextSlot <context> <slot_index> <depth>
 //
 // Load the object in |slot_index| of the context at |depth| in the context
 // chain starting at |context| into the accumulator.
 void Interpreter::DoLdaContextSlot(InterpreterAssembler* assembler) {
   Node* result = BuildLoadContextSlot(assembler);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
+// LdaCurrentContextSlot <slot_index>
+//
+// Load the object in |slot_index| of the current context into the accumulator.
+void Interpreter::DoLdaCurrentContextSlot(InterpreterAssembler* assembler) {
+  Node* result = BuildLoadCurrentContextSlot(assembler);
+  __ SetAccumulator(result);
+  __ Dispatch();
+}
+
 // LdrContextSlot <context> <slot_index> <depth> <reg>
 //
 // Load the object in |slot_index| of the context at |depth| in the context
 // chain of |context| into register |reg|.
 void Interpreter::DoLdrContextSlot(InterpreterAssembler* assembler) {
   Node* result = BuildLoadContextSlot(assembler);
   Node* destination = __ BytecodeOperandReg(3);
   __ StoreRegister(result, destination);
   __ Dispatch();
 }
 
+// LdrCurrentContextSlot <slot_index> <reg>
+//
+// Load the object in |slot_index| of the current context into register |reg|.
+void Interpreter::DoLdrCurrentContextSlot(InterpreterAssembler* assembler) {
+  Node* result = BuildLoadCurrentContextSlot(assembler);
+  Node* destination = __ BytecodeOperandReg(1);
+  __ StoreRegister(result, destination);
+  __ Dispatch();
+}
+
 // StaContextSlot <context> <slot_index> <depth>
 //
 // Stores the object in the accumulator into |slot_index| of the context at
 // |depth| in the context chain starting at |context|.
 void Interpreter::DoStaContextSlot(InterpreterAssembler* assembler) {
   Node* value = __ GetAccumulator();
   Node* reg_index = __ BytecodeOperandReg(0);
   Node* context = __ LoadRegister(reg_index);
   Node* slot_index = __ BytecodeOperandIdx(1);
   Node* depth = __ BytecodeOperandUImm(2);
   Node* slot_context = __ GetContextAtDepth(context, depth);
   __ StoreContextSlot(slot_context, slot_index, value);
   __ Dispatch();
 }
 
+// StaCurrentContextSlot <slot_index>
+//
+// Stores the object in the accumulator into |slot_index| of the current
+// context.
+void Interpreter::DoStaCurrentContextSlot(InterpreterAssembler* assembler) {
+  Node* value = __ GetAccumulator();
+  Node* slot_index = __ BytecodeOperandIdx(0);
+  Node* slot_context = __ GetContext();
+  __ StoreContextSlot(slot_context, slot_index, value);
+  __ Dispatch();
+}
+
 void Interpreter::DoLdaLookupSlot(Runtime::FunctionId function_id,
                                   InterpreterAssembler* assembler) {
   Node* name_index = __ BytecodeOperandIdx(0);
   Node* name = __ LoadConstantPoolEntry(name_index);
   Node* context = __ GetContext();
   Node* result = __ CallRuntime(function_id, context, name);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
@@ skipping 2064 matching lines @@
   __ StoreObjectField(generator, JSGeneratorObject::kContinuationOffset,
       __ SmiTag(new_state));
   __ SetAccumulator(old_state);
 
   __ Dispatch();
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8