emit premonomorphic ics for loads/stores in optimized code

src/ic/ic.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/arguments.h"
 #include "src/base/bits.h"
@@ skipping 964 matching lines @@
                                      ExtraICState extra_state) {
   if (FLAG_vector_ics) {
     return LoadICTrampolineStub(isolate, LoadICState(extra_state)).GetCode();
   }
 
   return PropertyICCompiler::ComputeLoad(isolate, UNINITIALIZED, extra_state);
 }
 
 
 Handle<Code> LoadIC::initialize_stub_in_optimized_code(
-    Isolate* isolate, ExtraICState extra_state) {
+    Isolate* isolate, ExtraICState extra_state, bool initialize_megamorphic) {
   if (FLAG_vector_ics) {
     return VectorLoadStub(isolate, LoadICState(extra_state)).GetCode();
   }
+  if (initialize_megamorphic) {
+    return PropertyICCompiler::ComputeLoad(isolate, MEGAMORPHIC, extra_state);
+  }
   return initialize_stub(isolate, extra_state);
 }
 
 
 Handle<Code> KeyedLoadIC::initialize_stub(Isolate* isolate) {
   if (FLAG_vector_ics) {
     return KeyedLoadICTrampolineStub(isolate).GetCode();
   }
 
   return isolate->builtins()->KeyedLoadIC_Initialize();
@@ skipping 600 matching lines @@
 
 Handle<Code> CallIC::initialize_stub_in_optimized_code(
     Isolate* isolate, int argc, CallICState::CallType call_type) {
   CallICStub stub(isolate, CallICState(argc, call_type));
   Handle<Code> code = stub.GetCode();
   return code;
 }
 
 
 Handle<Code> StoreIC::initialize_stub(Isolate* isolate,
-                                      LanguageMode language_mode) {
+                                      LanguageMode language_mode,
+                                      bool initialize_megamorphic) {
   ExtraICState extra_state = ComputeExtraICState(language_mode);
+  InlineCacheState state = initialize_megamorphic ? MEGAMORPHIC : UNINITIALIZED;
   Handle<Code> ic =
-      PropertyICCompiler::ComputeStore(isolate, UNINITIALIZED, extra_state);
+      PropertyICCompiler::ComputeStore(isolate, state, extra_state);
   return ic;
 }
 
 
 Handle<Code> StoreIC::megamorphic_stub() {
   if (kind() == Code::STORE_IC) {
     return PropertyICCompiler::ComputeStore(isolate(), MEGAMORPHIC,
                                             extra_ic_state());
   } else {
     DCHECK(kind() == Code::KEYED_STORE_IC);
@@ skipping 1366 matching lines @@
 static const Address IC_utilities[] = {
 #define ADDR(name) FUNCTION_ADDR(name),
     IC_UTIL_LIST(ADDR) NULL
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) { return IC_utilities[id]; }
 }
 }  // namespace v8::internal