Reland of Immediately cache compiled scripts.

test/cctest/heap/test-heap.cc

 // Copyright 2012 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 1569 matching lines @@
       "};"
       "foo()";
   Handle<String> source = factory->InternalizeUtf8String(raw_source);
   Handle<Context> native_context = isolate->native_context();
 
   {
     v8::HandleScope scope(CcTest::isolate());
     CompileRun(raw_source);
   }
 
-  // On first compilation, only a hash is inserted in the code cache. We can't
-  // find that value.
+  // The script should be in the cache now.
   MaybeHandle<SharedFunctionInfo> info = compilation_cache->LookupScript(
       source, Handle<Object>(), 0, 0,
       v8::ScriptOriginOptions(false, true, false), native_context,
       language_mode);
-  CHECK(info.is_null());
-
-  {
-    v8::HandleScope scope(CcTest::isolate());
-    CompileRun(raw_source);
-  }
-
-  // On second compilation, the hash is replaced by a real cache entry mapping
-  // the source to the shared function info containing the code.
-  info = compilation_cache->LookupScript(
-      source, Handle<Object>(), 0, 0,
-      v8::ScriptOriginOptions(false, true, false), native_context,
-      language_mode);
   CHECK(!info.is_null());
 
   // Check that the code cache entry survives at least on GC.
   // (Unless --optimize-for-size, in which case it might get collected
   // immediately.)
   if (!FLAG_optimize_for_size) {
     heap->CollectAllGarbage();
     info = compilation_cache->LookupScript(
         source, Handle<Object>(), 0, 0,
         v8::ScriptOriginOptions(false, true, false), native_context,
         language_mode);
     CHECK(!info.is_null());
   }
 
   // Progress code age until it's old and ready for GC.
   while (!info.ToHandleChecked()->code()->IsOld()) {
     // To guarantee progress, we have to MakeOlder with different parities.
     // We can't just use NO_MARKING_PARITY, since e.g. kExecutedOnceCodeAge is
     // always NO_MARKING_PARITY and the code age only progresses if the parity
     // is different.
     info.ToHandleChecked()->code()->MakeOlder(ODD_MARKING_PARITY);
     info.ToHandleChecked()->code()->MakeOlder(EVEN_MARKING_PARITY);
   }
 
   heap->CollectAllGarbage();
   // Ensure code aging cleared the entry from the cache.
   info = compilation_cache->LookupScript(
       source, Handle<Object>(), 0, 0,
       v8::ScriptOriginOptions(false, true, false), native_context,
-      language_mode);
-  CHECK(info.is_null());
-
-  {
-    v8::HandleScope scope(CcTest::isolate());
-    CompileRun(raw_source);
-  }
-
-  // On first compilation, only a hash is inserted in the code cache. We can't
-  // find that value.
-  info = compilation_cache->LookupScript(
-      source, Handle<Object>(), 0, 0,
-      v8::ScriptOriginOptions(false, true, false), native_context,
-      language_mode);
-  CHECK(info.is_null());
-
-  for (int i = 0; i < CompilationCacheTable::kHashGenerations; i++) {
-    compilation_cache->MarkCompactPrologue();
-  }
-
-  {
-    v8::HandleScope scope(CcTest::isolate());
-    CompileRun(raw_source);
-  }
-
-  // If we aged the cache before caching the script, ensure that we didn't cache
-  // on next compilation.
-  info = compilation_cache->LookupScript(
-      source, Handle<Object>(), 0, 0,
-      v8::ScriptOriginOptions(false, true, false), native_context,
       language_mode);
   CHECK(info.is_null());
 }
 
 
 static void OptimizeEmptyFunction(const char* name) {
   HandleScope scope(CcTest::i_isolate());
   EmbeddedVector<char, 256> source;
   SNPrintF(source,
            "function %s() { return 0; }"
@@ skipping 4924 matching lines @@
       heap->RightTrimFixedArray<Heap::CONCURRENT_TO_SWEEPER>(arrays[j], N - 1);
     }
   }
   // Force allocation from the free list.
   heap->set_force_oom(true);
   heap->CollectGarbage(OLD_SPACE);
 }
 
 }  // namespace internal
 }  // namespace v8