[esnext] implement frontend changes for async/await proposal

src/globals.h

 // Copyright 2012 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_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 926 matching lines @@
   kNormalFunction = 0,
   kArrowFunction = 1 << 0,
   kGeneratorFunction = 1 << 1,
   kConciseMethod = 1 << 2,
   kConciseGeneratorMethod = kGeneratorFunction | kConciseMethod,
   kDefaultConstructor = 1 << 3,
   kSubclassConstructor = 1 << 4,
   kBaseConstructor = 1 << 5,
   kGetterFunction = 1 << 6,
   kSetterFunction = 1 << 7,
+  kAsyncFunction = 1 << 8,
   kAccessorFunction = kGetterFunction | kSetterFunction,
   kDefaultBaseConstructor = kDefaultConstructor | kBaseConstructor,
   kDefaultSubclassConstructor = kDefaultConstructor | kSubclassConstructor,
   kClassConstructor =
       kBaseConstructor | kSubclassConstructor | kDefaultConstructor,
+  kAsyncArrowFunction = kArrowFunction | kAsyncFunction,
+  kAsyncConciseMethod = kAsyncFunction | kConciseMethod
 };
 
 inline bool IsValidFunctionKind(FunctionKind kind) {
   return kind == FunctionKind::kNormalFunction ||
          kind == FunctionKind::kArrowFunction ||
          kind == FunctionKind::kGeneratorFunction ||
          kind == FunctionKind::kConciseMethod ||
          kind == FunctionKind::kConciseGeneratorMethod ||
          kind == FunctionKind::kGetterFunction ||
          kind == FunctionKind::kSetterFunction ||
          kind == FunctionKind::kAccessorFunction ||
          kind == FunctionKind::kDefaultBaseConstructor ||
          kind == FunctionKind::kDefaultSubclassConstructor ||
          kind == FunctionKind::kBaseConstructor ||
-         kind == FunctionKind::kSubclassConstructor;
+         kind == FunctionKind::kSubclassConstructor ||
+         kind == FunctionKind::kAsyncFunction ||
+         kind == FunctionKind::kAsyncArrowFunction ||
+         kind == FunctionKind::kAsyncConciseMethod;
 }
 
 
 inline bool IsArrowFunction(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kArrowFunction;
 }
 
 
 inline bool IsGeneratorFunction(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kGeneratorFunction;
 }
 
+inline bool IsAsyncFunction(FunctionKind kind) {
+  DCHECK(IsValidFunctionKind(kind));
+  return kind & FunctionKind::kAsyncFunction;
+}
 
 inline bool IsConciseMethod(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kConciseMethod;
 }
 
 inline bool IsGetterFunction(FunctionKind kind) {
   DCHECK(IsValidFunctionKind(kind));
   return kind & FunctionKind::kGetterFunction;
 }
@@ skipping 48 matching lines @@
   return static_cast<uint32_t>(bit_cast<uintptr_t>(address) >>
                                kPointerSizeLog2);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_