[ignition,modules] Introduce bytecodes for loading/storing module variables.

src/compiler/bytecode-graph-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/compiler/bytecode-graph-builder.h"
 
 #include "src/ast/ast.h"
 #include "src/ast/scopes.h"
 #include "src/compilation-info.h"
 #include "src/compiler/bytecode-branch-analysis.h"
@@ skipping 1114 matching lines @@
 }
 
 void BytecodeGraphBuilder::VisitStaKeyedPropertySloppy() {
   BuildKeyedStore(LanguageMode::SLOPPY);
 }
 
 void BytecodeGraphBuilder::VisitStaKeyedPropertyStrict() {
   BuildKeyedStore(LanguageMode::STRICT);
 }
 
+void BytecodeGraphBuilder::VisitLdaModuleVariable() {
+  // TODO(neis): Don't call the runtime.

[Benedikt Meurer, 2016/11/04 16:45:59]

So next step is to introduce JSLoadModuleVariable and JSStoreModuleVariable,
backed by these runtime calls? And then add typed lowering to
LoadElement/StoreElement?

+  PrepareEagerCheckpoint();
+  Node* index = jsgraph()->Constant(bytecode_iterator().GetImmediateOperand(0));
+  const Operator* op = javascript()->CallRuntime(Runtime::kLoadModuleVariable);
+  Node* value = NewNode(op, index);
+  environment()->BindAccumulator(value, Environment::kAttachFrameState);
+}
+
+void BytecodeGraphBuilder::VisitStaModuleVariable() {
+  // TODO(neis): Don't call the runtime.
+  PrepareEagerCheckpoint();
+  Node* index = jsgraph()->Constant(bytecode_iterator().GetImmediateOperand(0));
+  Node* value = environment()->LookupAccumulator();
+  const Operator* op = javascript()->CallRuntime(Runtime::kStoreModuleVariable);
+  Node* store = NewNode(op, index, value);
+  environment()->RecordAfterState(store, Environment::kAttachFrameState);
+}
+
 void BytecodeGraphBuilder::VisitPushContext() {
   Node* new_context = environment()->LookupAccumulator();
   environment()->BindRegister(bytecode_iterator().GetRegisterOperand(0),
                               environment()->Context());
   environment()->SetContext(new_context);
 }
 
 void BytecodeGraphBuilder::VisitPopContext() {
   Node* context =
       environment()->LookupRegister(bytecode_iterator().GetRegisterOperand(0));
@@ skipping 1088 matching lines @@
     source_positions_->set_current_position(it->source_position());
     it->Advance();
   } else {
     DCHECK_GT(it->code_offset(), offset);
   }
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8