Contribution of PowerPC port.

src/objects.cc

 // Copyright 2013 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/allocation-site-scopes.h"
 #include "src/api.h"
 #include "src/arguments.h"
@@ skipping 764 matching lines @@
   if (!fun->shared()->IsApiFunction())
     return true;
   // If the object is fully fast case and has the same map it was
   // created with then no changes can have been made to it.
   return map() != fun->initial_map()
       || !HasFastObjectElements()
       || !HasFastProperties();
 }
 
 
+#if defined(__GNUC__) && (__GNUC__ == 4) && (__GNUC_MINOR__ <= 4)
+// Work around bad optimization by GCC 4.4.6 on PPC Linux
+#pragma GCC optimize "O0"

[danno, 2014/07/29 13:24:08]

Please use this style of guard with the GCC detection and resetting afterwards
elsewhere where #pragmaGCC optimize is used.

Also, are you sure it's bad optimization, or not some strange hidden bug in our
code?

+#endif
 MaybeHandle<Object> Object::GetElementWithReceiver(Isolate* isolate,
                                                    Handle<Object> object,
                                                    Handle<Object> receiver,
                                                    uint32_t index) {
   if (object->IsUndefined()) {
     // TODO(verwaest): Why is this check here?
     UNREACHABLE();
     return isolate->factory()->undefined_value();
   }
 
@@ skipping 34 matching lines @@
       ASSIGN_RETURN_ON_EXCEPTION(
           isolate, result,
           js_object->GetElementsAccessor()->Get(receiver, js_object, index),
           Object);
       if (!result->IsTheHole()) return result;
     }
   }
 
   return isolate->factory()->undefined_value();
 }
+#if defined(__GNUC__) && (__GNUC__ == 4) && (__GNUC_MINOR__ <= 4)
+#pragma GCC reset_options
+#endif
 
 
 Map* Object::GetRootMap(Isolate* isolate) {
   DisallowHeapAllocation no_alloc;
   if (IsSmi()) {
     Context* context = isolate->context()->native_context();
     return context->number_function()->initial_map();
   }
 
   HeapObject* heap_object = HeapObject::cast(this);
@@ skipping 8815 matching lines @@
   int properties = mode == CLEAR_INOBJECT_PROPERTIES
       ? 0 : other->inobject_properties();
   return CheckEquivalent(this, other) && inobject_properties() == properties;
 }
 
 
 void ConstantPoolArray::ConstantPoolIterateBody(ObjectVisitor* v) {
   // Unfortunately the serializer relies on pointers within an object being
   // visited in-order, so we have to iterate both the code and heap pointers in
   // the small section before doing so in the extended section.
+  WeakObjectState state = get_weak_object_state();
   for (int s = 0; s <= final_section(); ++s) {
     LayoutSection section = static_cast<LayoutSection>(s);
     ConstantPoolArray::Iterator code_iter(this, ConstantPoolArray::CODE_PTR,
                                           section);
     while (!code_iter.is_finished()) {
       v->VisitCodeEntry(reinterpret_cast<Address>(
           RawFieldOfElementAt(code_iter.next_index())));
     }
 
     ConstantPoolArray::Iterator heap_iter(this, ConstantPoolArray::HEAP_PTR,
                                           section);
     while (!heap_iter.is_finished()) {
-      v->VisitPointer(RawFieldOfElementAt(heap_iter.next_index()));
+      v->VisitConstantPoolEmbeddedPointer(
+          RawFieldOfElementAt(heap_iter.next_index()), state);
     }
   }
 }
 
 
 void ConstantPoolArray::ClearPtrEntries(Isolate* isolate) {
   Type type[] = { CODE_PTR, HEAP_PTR };
   Address default_value[] = {
         isolate->builtins()->builtin(Builtins::kIllegal)->entry(),
         reinterpret_cast<Address>(isolate->heap()->undefined_value()) };
@@ skipping 1825 matching lines @@
       os << "\n";
     }
 #endif
   }
 
   os << "RelocInfo (size = " << relocation_size() << ")\n";
   for (RelocIterator it(this); !it.done(); it.next()) {
     it.rinfo()->Print(GetIsolate(), os);
   }
   os << "\n";
+
+  if (FLAG_enable_ool_constant_pool) {
+    ConstantPoolArray *pool = constant_pool();
+    if (pool->length()) {
+      os << "Constant Pool\n";
+      pool->Print(os);
+      os << "\n";
+    }
+  }
 }
 #endif  // ENABLE_DISASSEMBLER
 
 
 Handle<FixedArray> JSObject::SetFastElementsCapacityAndLength(
     Handle<JSObject> object,
     int capacity,
     int length,
     SetFastElementsCapacitySmiMode smi_mode) {
   // We should never end in here with a pixel or external array.
@@ skipping 5400 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal