Contribution of PowerPC port.

src/mark-compact.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/base/atomicops.h"
 #include "src/code-stubs.h"
 #include "src/compilation-cache.h"
 #include "src/cpu-profiler.h"
@@ skipping 49 matching lines @@
 
   void VisitPointers(Object** start, Object** end) {
     for (Object** current = start; current < end; current++) {
       if ((*current)->IsHeapObject()) {
         HeapObject* object = HeapObject::cast(*current);
         CHECK(heap_->mark_compact_collector()->IsMarked(object));
       }
     }
   }
 
+  void VisitConstantPoolEmbeddedPointer(
+      Object** p,
+      ConstantPoolArray::WeakObjectState state) {
+    bool is_weak_object =
+        (state == ConstantPoolArray::WEAK_OBJECTS_IN_OPTIMIZED_CODE &&
+         Code::IsWeakObjectInOptimizedCode(*p)) ||
+        (state == ConstantPoolArray::WEAK_OBJECTS_IN_IC &&
+         Code::IsWeakObjectInIC(*p));
+    if (!is_weak_object)
+      VisitPointer(p);
+  }
+
   void VisitEmbeddedPointer(RelocInfo* rinfo) {
     ASSERT(rinfo->rmode() == RelocInfo::EMBEDDED_OBJECT);
     if (!rinfo->host()->IsWeakObject(rinfo->target_object())) {
       Object* p = rinfo->target_object();
       VisitPointer(&p);
     }
   }
 
   void VisitCell(RelocInfo* rinfo) {
     Code* code = rinfo->host();
@@ skipping 4509 matching lines @@
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 
 
 } }  // namespace v8::internal