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

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 93a2971ed16837801609c32d5dbed6aee2bc28bd..9ad681c3139697ebac2f6e746cdf28177315cb83 100644
--- a/src/compiler/bytecode-graph-builder.cc
+++ b/src/compiler/bytecode-graph-builder.cc
@@ -809,16 +809,36 @@ Node* BytecodeGraphBuilder::BuildLoadContextSlot() {
   return NewNode(op, context);
 }
 
+Node* BytecodeGraphBuilder::BuildLoadLocalContextSlot() {
+  // TODO(mythria): immutable flag is also set to false. This information is not
+  // available in bytecode array. update this code when the implementation
+  // changes.
+  const Operator* op = javascript()->LoadContext(
+      0, bytecode_iterator().GetIndexOperand(0), false);
+  Node* context = environment()->Context();
+  return NewNode(op, context);
+}
+
 void BytecodeGraphBuilder::VisitLdaContextSlot() {
   Node* node = BuildLoadContextSlot();
   environment()->BindAccumulator(node);
 }
 
+void BytecodeGraphBuilder::VisitLdaLocalContextSlot() {
+  Node* node = BuildLoadLocalContextSlot();
+  environment()->BindAccumulator(node);
+}
+
 void BytecodeGraphBuilder::VisitLdrContextSlot() {
   Node* node = BuildLoadContextSlot();
   environment()->BindRegister(bytecode_iterator().GetRegisterOperand(3), node);
 }
 
+void BytecodeGraphBuilder::VisitLdrLocalContextSlot() {
+  Node* node = BuildLoadLocalContextSlot();
+  environment()->BindRegister(bytecode_iterator().GetRegisterOperand(1), node);
+}
+
 void BytecodeGraphBuilder::VisitStaContextSlot() {
   const Operator* op = javascript()->StoreContext(
       bytecode_iterator().GetUnsignedImmediateOperand(2),
@@ -829,6 +849,14 @@ void BytecodeGraphBuilder::VisitStaContextSlot() {
   NewNode(op, context, value);
 }
 
+void BytecodeGraphBuilder::VisitStaLocalContextSlot() {
+  const Operator* op =
+      javascript()->StoreContext(0, bytecode_iterator().GetIndexOperand(0));
+  Node* context = environment()->Context();
+  Node* value = environment()->LookupAccumulator();
+  NewNode(op, context, value);
+}
+
 void BytecodeGraphBuilder::BuildLdaLookupSlot(TypeofMode typeof_mode) {
   PrepareEagerCheckpoint();
   Node* name =