Polymorphism support for load IC.

src/objects.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 8694 matching lines @@
   int mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT);
   for (RelocIterator it(this, mask); !it.done(); it.next()) {
     RelocInfo* info = it.rinfo();
     Object* object = info->target_object();
     if (object->IsMap()) return Map::cast(object);
   }
   return NULL;
 }
 
 
+void Code::FindAllMaps(MapHandleList* maps) {
+  ASSERT(is_inline_cache_stub());
+  AssertNoAllocation no_allocation;
+  int mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT);
+  for (RelocIterator it(this, mask); !it.done(); it.next()) {
+    RelocInfo* info = it.rinfo();
+    Object* object = info->target_object();
+    if (object->IsMap()) maps->Add(Handle<Map>(Map::cast(object)));
+  }
+}
+
+
+Code* Code::FindFirstCode() {
+  ASSERT(is_inline_cache_stub());
+  AssertNoAllocation no_allocation;
+  int mask = RelocInfo::ModeMask(RelocInfo::CODE_TARGET);
+  for (RelocIterator it(this, mask); !it.done(); it.next()) {
+    RelocInfo* info = it.rinfo();
+    return Code::GetCodeFromTargetAddress(info->target_address());
+  }
+  return NULL;
+}
+
+
+void Code::FindAllCode(CodeHandleList* code_list, int length) {
+  ASSERT(is_inline_cache_stub());
+  AssertNoAllocation no_allocation;
+  int mask = RelocInfo::ModeMask(RelocInfo::CODE_TARGET);
+  int i = 0;
+  for (RelocIterator it(this, mask); !it.done(); it.next()) {
+    if (i++ == length) return;
+    RelocInfo* info = it.rinfo();
+    Code* code = Code::GetCodeFromTargetAddress(info->target_address());
+    ASSERT(code->is_load_stub());
+    code_list->Add(Handle<Code>(code));
+  }
+  UNREACHABLE();
+}
+
+
 void Code::ClearInlineCaches() {
   int mask = RelocInfo::ModeMask(RelocInfo::CODE_TARGET) |
              RelocInfo::ModeMask(RelocInfo::CONSTRUCT_CALL) |
              RelocInfo::ModeMask(RelocInfo::CODE_TARGET_WITH_ID) |
              RelocInfo::ModeMask(RelocInfo::CODE_TARGET_CONTEXT);
   for (RelocIterator it(this, mask); !it.done(); it.next()) {
     RelocInfo* info = it.rinfo();
     Code* target(Code::GetCodeFromTargetAddress(info->target_address()));
     if (target->is_inline_cache_stub()) {
       IC::Clear(info->pc());
@@ skipping 5263 matching lines @@
   set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER);
   set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER);
   set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER);
   set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER);
   set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER);
   set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER);
   set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER);
 }
 
 } }  // namespace v8::internal