PPC: Changes to allow AIX to compile with gcc 4.8.3

src/heap/heap.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/base/bits.h"
 #include "src/base/once.h"
@@ skipping 2884 matching lines @@
                            SKIP_WRITE_BARRIER);
   cell->set_value(the_hole_value());
   cell->set_type(HeapType::None());
   return result;
 }
 
 
 AllocationResult Heap::AllocateWeakCell(HeapObject* value) {
   int size = WeakCell::kSize;
   STATIC_ASSERT(WeakCell::kSize <= Page::kMaxRegularHeapObjectSize);
-  HeapObject* result;
+  HeapObject* result = NULL;
   {
     AllocationResult allocation =
         AllocateRaw(size, OLD_POINTER_SPACE, OLD_POINTER_SPACE);
     if (!allocation.To(&result)) return allocation;
   }
   result->set_map_no_write_barrier(weak_cell_map());
   WeakCell::cast(result)->initialize(value);
   WeakCell::cast(result)->set_next(undefined_value(), SKIP_WRITE_BARRIER);
   return result;
 }
@@ skipping 1555 matching lines @@
   ConstantPoolArray* constant_pool = ConstantPoolArray::cast(object);
   constant_pool->InitExtended(small, extended);
   constant_pool->ClearPtrEntries(isolate());
   return constant_pool;
 }
 
 
 AllocationResult Heap::AllocateEmptyConstantPoolArray() {
   ConstantPoolArray::NumberOfEntries small(0, 0, 0, 0);
   int size = ConstantPoolArray::SizeFor(small);
-  HeapObject* result;
+  HeapObject* result = NULL;
   {
     AllocationResult allocation =
         AllocateRaw(size, OLD_DATA_SPACE, OLD_DATA_SPACE);
     if (!allocation.To(&result)) return allocation;
   }
   result->set_map_no_write_barrier(constant_pool_array_map());
   ConstantPoolArray::cast(result)->Init(small);
   return result;
 }
 
 
 AllocationResult Heap::AllocateSymbol() {
   // Statically ensure that it is safe to allocate symbols in paged spaces.
   STATIC_ASSERT(Symbol::kSize <= Page::kMaxRegularHeapObjectSize);
 
-  HeapObject* result;
+  HeapObject* result = NULL;
   AllocationResult allocation =
       AllocateRaw(Symbol::kSize, OLD_POINTER_SPACE, OLD_POINTER_SPACE);
   if (!allocation.To(&result)) return allocation;
 
   result->set_map_no_write_barrier(symbol_map());
 
   // Generate a random hash value.
   int hash;
   int attempts = 0;
   do {
@@ skipping 1941 matching lines @@
       static_cast<int>(object_sizes_last_time_[index]));
   CODE_AGE_LIST_COMPLETE(ADJUST_LAST_TIME_OBJECT_COUNT)
 #undef ADJUST_LAST_TIME_OBJECT_COUNT
 
   MemCopy(object_counts_last_time_, object_counts_, sizeof(object_counts_));
   MemCopy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_));
   ClearObjectStats();
 }
 }
 }  // namespace v8::internal