Assign unique IDs to FunctionLiterals

src/objects.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/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <memory>
 #include <sstream>
@@ skipping 13593 matching lines @@
 
 
 MaybeHandle<SharedFunctionInfo> Script::FindSharedFunctionInfo(
     FunctionLiteral* fun) {
   WeakFixedArray::Iterator iterator(shared_function_infos());
   SharedFunctionInfo* shared;
   while ((shared = iterator.Next<SharedFunctionInfo>())) {
     if (fun->function_token_position() == shared->function_token_position() &&
         fun->start_position() == shared->start_position() &&
         fun->end_position() == shared->end_position()) {
+      DCHECK_EQ(fun->function_literal_num(), shared->function_literal_num());
       return Handle<SharedFunctionInfo>(shared);
     }
+    DCHECK_NE(fun->function_literal_num(), shared->function_literal_num());
   }
   return MaybeHandle<SharedFunctionInfo>();
 }
 
 
 Script::Iterator::Iterator(Isolate* isolate)
     : iterator_(isolate->heap()->script_list()) {}
 
 
 Script* Script::Iterator::Next() { return iterator_.Next<Script>(); }
@@ skipping 331 matching lines @@
   shared_info->set_kind(lit->kind());
   if (!IsConstructable(lit->kind(), lit->language_mode())) {
     shared_info->SetConstructStub(
         *shared_info->GetIsolate()->builtins()->ConstructedNonConstructable());
   }
   shared_info->set_needs_home_object(lit->scope()->NeedsHomeObject());
   shared_info->set_asm_function(lit->scope()->asm_function());
   shared_info->set_requires_class_field_init(lit->requires_class_field_init());
   shared_info->set_is_class_field_initializer(
       lit->is_class_field_initializer());
+  shared_info->set_function_literal_num(lit->function_literal_num());
   SetExpectedNofPropertiesFromEstimate(shared_info, lit);
 }
 
 
 bool SharedFunctionInfo::VerifyBailoutId(BailoutId id) {
   DCHECK(!id.IsNone());
   Code* unoptimized = code();
   DeoptimizationOutputData* data =
       DeoptimizationOutputData::cast(unoptimized->deoptimization_data());
   unsigned ignore = Deoptimizer::GetOutputInfo(data, id, this);
@@ skipping 6445 matching lines @@
       // depend on this.
       return DICTIONARY_ELEMENTS;
     }
     DCHECK_LE(kind, LAST_ELEMENTS_KIND);
     return kind;
   }
 }
 
 }  // namespace internal
 }  // namespace v8