[modules] Introduce new VariableLocation for module imports/exports.

src/full-codegen/arm64/full-codegen-arm64.cc

 // Copyright 2013 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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 781 matching lines @@
     case VariableLocation::LOOKUP: {
       Comment cmnt(masm_, "[ VariableDeclaration");
       DCHECK_EQ(VAR, variable->mode());
       DCHECK(!variable->binding_needs_init());
       __ Mov(x2, Operand(variable->name()));
       __ Push(x2);
       __ CallRuntime(Runtime::kDeclareEvalVar);
       PrepareForBailoutForId(proxy->id(), BailoutState::NO_REGISTERS);
       break;
     }
+
+    case VariableLocation::MODULE:
+      UNREACHABLE();
   }
 }
 
 
 void FullCodeGenerator::VisitFunctionDeclaration(
     FunctionDeclaration* declaration) {
   VariableProxy* proxy = declaration->proxy();
   Variable* variable = proxy->var();
   switch (variable->location()) {
     case VariableLocation::GLOBAL:
@@ skipping 39 matching lines @@
     case VariableLocation::LOOKUP: {
       Comment cmnt(masm_, "[ Function Declaration");
       __ Mov(x2, Operand(variable->name()));
       PushOperand(x2);
       // Push initial value for function declaration.
       VisitForStackValue(declaration->fun());
       CallRuntimeWithOperands(Runtime::kDeclareEvalFunction);
       PrepareForBailoutForId(proxy->id(), BailoutState::NO_REGISTERS);
       break;
     }
+
+    case VariableLocation::MODULE:
+      UNREACHABLE();
   }
 }
 
 
 void FullCodeGenerator::DeclareGlobals(Handle<FixedArray> pairs) {
   // Call the runtime to declare the globals.
   __ Mov(x11, Operand(pairs));
   Register flags = xzr;
   if (Smi::FromInt(DeclareGlobalsFlags())) {
     flags = x10;
@@ skipping 458 matching lines @@
       __ Push(var->name());
       Runtime::FunctionId function_id =
           typeof_mode == NOT_INSIDE_TYPEOF
               ? Runtime::kLoadLookupSlot
               : Runtime::kLoadLookupSlotInsideTypeof;
       __ CallRuntime(function_id);
       __ Bind(&done);
       context()->Plug(x0);
       break;
     }
+
+    case VariableLocation::MODULE:
+      UNREACHABLE();
   }
 }
 
 
 void FullCodeGenerator::EmitAccessor(ObjectLiteralProperty* property) {
   Expression* expression = (property == NULL) ? NULL : property->value();
   if (expression == NULL) {
     __ LoadRoot(x10, Heap::kNullValueRootIndex);
     PushOperand(x10);
   } else {
@@ skipping 2487 matching lines @@
   }
 
   return INTERRUPT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64