Reland: [Compiler] Enable handles created during parsing and scope analysis to be deferred.

src/parsing/parse-info.cc

 // Copyright 2016 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/parsing/parse-info.h"
 
+#include "src/api.h"
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/ast.h"
 #include "src/heap/heap-inl.h"
 #include "src/objects-inl.h"
 #include "src/objects/scope-info.h"
 #include "src/zone/zone.h"
 
 namespace v8 {
 namespace internal {
 
@@ skipping 12 matching lines @@
       hash_seed_(0),
       compiler_hints_(0),
       start_position_(0),
       end_position_(0),
       function_literal_id_(FunctionLiteral::kIdTypeInvalid),
       max_function_literal_id_(FunctionLiteral::kIdTypeInvalid),
       isolate_(nullptr),
       cached_data_(nullptr),
       ast_value_factory_(nullptr),
       function_name_(nullptr),
-      literal_(nullptr) {}
+      literal_(nullptr),
+      deferred_handles_(nullptr) {}
 
 ParseInfo::ParseInfo(Handle<SharedFunctionInfo> shared)
     : ParseInfo(shared->GetIsolate()->allocator()) {
   isolate_ = shared->GetIsolate();
 
   set_toplevel(shared->is_toplevel());
   set_allow_lazy_parsing(FLAG_lazy_inner_functions);
   set_hash_seed(isolate_->heap()->HashSeed());
   set_is_named_expression(shared->is_named_expression());
   set_calls_eval(shared->scope_info()->CallsEval());
@@ skipping 51 matching lines @@
 DeclarationScope* ParseInfo::scope() const { return literal()->scope(); }
 
 bool ParseInfo::is_declaration() const {
   return (compiler_hints_ & (1 << SharedFunctionInfo::kIsDeclaration)) != 0;
 }
 
 FunctionKind ParseInfo::function_kind() const {
   return SharedFunctionInfo::FunctionKindBits::decode(compiler_hints_);
 }
 
+void ParseInfo::set_deferred_handles(
+    std::shared_ptr<DeferredHandles> deferred_handles) {
+  DCHECK(deferred_handles_.get() == nullptr);
+  deferred_handles_.swap(deferred_handles);
+}
+
+void ParseInfo::set_deferred_handles(DeferredHandles* deferred_handles) {
+  DCHECK(deferred_handles_.get() == nullptr);
+  deferred_handles_.reset(deferred_handles);
+}
+
 #ifdef DEBUG
 bool ParseInfo::script_is_native() const {
   return script_->type() == Script::TYPE_NATIVE;
 }
 #endif  // DEBUG
 
 }  // namespace internal
 }  // namespace v8