Pregenerate a RecordWrite stub that we need in the new CallFunctionStub

src/stub-cache.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 37 matching lines @@
   memset(primary_, 0, sizeof(primary_[0]) * StubCache::kPrimaryTableSize);
   memset(secondary_, 0, sizeof(secondary_[0]) * StubCache::kSecondaryTableSize);
 }
 
 
 void StubCache::Initialize(bool create_heap_objects) {
   ASSERT(IsPowerOf2(kPrimaryTableSize));
   ASSERT(IsPowerOf2(kSecondaryTableSize));
   if (create_heap_objects) {
     HandleScope scope;
-    Clear();
+    Code* empty = isolate_->builtins()->builtin(Builtins::kIllegal);
+    for (int i = 0; i < kPrimaryTableSize; i++) {
+      primary_[i].key = heap()->empty_string();
+      primary_[i].value = empty;
+    }
+    for (int j = 0; j < kSecondaryTableSize; j++) {
+      secondary_[j].key = heap()->empty_string();
+      secondary_[j].value = empty;
+    }
   }
 }
 
 
 Code* StubCache::Set(String* name, Map* map, Code* code) {
   // Get the flags from the code.
   Code::Flags flags = Code::RemoveTypeFromFlags(code->flags());
 
   // Validate that the name does not move on scavenge, and that we
   // can use identity checks instead of string equality checks.
@@ skipping 1023 matching lines @@
     if (!maybe_probe->ToObject(&probe)) return maybe_probe;
   }
   if (!probe->IsUndefined()) return probe;
   StubCompiler compiler;
   return FillCache(isolate_, compiler.CompileCallDebugPrepareStepIn(flags));
 }
 #endif
 
 
 void StubCache::Clear() {
+  Code* empty = isolate_->builtins()->builtin(Builtins::kIllegal);
   for (int i = 0; i < kPrimaryTableSize; i++) {
-    primary_[i].key = heap()->empty_string();
-    primary_[i].value = isolate_->builtins()->builtin(
-        Builtins::kIllegal);
+    Code* code = primary_[i].value;
+    if (code != empty && !code->is_pregenerated()) {
+      primary_[i].key = heap()->empty_string();
+      primary_[i].value = empty;
+    }
   }
   for (int j = 0; j < kSecondaryTableSize; j++) {
-    secondary_[j].key = heap()->empty_string();
-    secondary_[j].value = isolate_->builtins()->builtin(
-        Builtins::kIllegal);
+    Code* code = secondary_[j].value;
+    if (code != empty && !code->is_pregenerated()) {
+      secondary_[j].key = heap()->empty_string();
+      secondary_[j].value = empty;
+    }
   }
 }
 
 
 void StubCache::CollectMatchingMaps(SmallMapList* types,
                                     String* name,
                                     Code::Flags flags) {
   for (int i = 0; i < kPrimaryTableSize; i++) {
     if (primary_[i].key == name) {
       Map* map = primary_[i].value->FindFirstMap();
@@ skipping 712 matching lines @@
       expected_receiver_type_ =
           FunctionTemplateInfo::cast(signature->receiver());
     }
   }
 
   is_simple_api_call_ = true;
 }
 
 
 } }  // namespace v8::internal