Support polymorphic loads of constant functions as well as fields.

src/hydrogen-instructions.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 1188 matching lines @@
       name_(name),
       need_generic_(false) {
   set_representation(Representation::Tagged());
   SetFlag(kDependsOnMaps);
   for (int i = 0;
        i < types->length() && types_.length() < kMaxLoadPolymorphism;
        ++i) {
     Handle<Map> map = types->at(i);
     LookupResult lookup;
     map->LookupInDescriptors(NULL, *name, &lookup);
-    if (lookup.IsProperty() && lookup.type() == FIELD) {
-      types_.Add(types->at(i));
-      int index = lookup.GetLocalFieldIndexFromMap(*map);
-      if (index < 0) {
-        SetFlag(kDependsOnInobjectFields);
-      } else {
-        SetFlag(kDependsOnBackingStoreFields);
+    if (lookup.IsProperty()) {
+      switch (lookup.type()) {
+        case FIELD: {
+          int index = lookup.GetLocalFieldIndexFromMap(*map);
+          if (index < 0) {
+            SetFlag(kDependsOnInobjectFields);
+          } else {
+            SetFlag(kDependsOnBackingStoreFields);
+          }
+          types_.Add(types->at(i));
+          break;
+        }
+        case CONSTANT_FUNCTION:
+          types_.Add(types->at(i));
+          break;
+        default:
+          break;
       }
     }
   }
 
   if (types_.length() == types->length() && FLAG_deoptimize_uncommon_cases) {
     SetFlag(kUseGVN);
   } else {
     SetAllSideEffects();
     need_generic_ = true;
   }
@@ skipping 450 matching lines @@
 
 
 void HCheckPrototypeMaps::Verify() {
   HInstruction::Verify();
   ASSERT(HasNoUses());
 }
 
 #endif
 
 } }  // namespace v8::internal