Remove explicit double alignment from allocation helper functions.

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 3648 matching lines @@
 
 
 AllocationResult Heap::AllocateFixedTypedArray(int length,
                                                ExternalArrayType array_type,
                                                PretenureFlag pretenure) {
   int element_size;
   ElementsKind elements_kind;
   ForFixedTypedArray(array_type, &element_size, &elements_kind);
   int size = OBJECT_POINTER_ALIGN(length * element_size +
                                   FixedTypedArrayBase::kDataOffset);
-#ifndef V8_HOST_ARCH_64_BIT
-  if (array_type == kExternalFloat64Array) {
-    size += kPointerSize;
-  }
-#endif
   AllocationSpace space = SelectSpace(size, pretenure);
 
   HeapObject* object;
-  AllocationResult allocation = AllocateRaw(size, space, OLD_SPACE);
+  AllocationResult allocation = AllocateRaw(
+      size, space, OLD_SPACE,
+      array_type == kExternalFloat64Array ? kDoubleWordAligned : kWordAligned);
   if (!allocation.To(&object)) return allocation;
 
-  if (array_type == kExternalFloat64Array) {
-    object = EnsureDoubleAligned(object, size);
-  }
-
   object->set_map(MapForFixedTypedArray(array_type));
   FixedTypedArrayBase* elements = FixedTypedArrayBase::cast(object);
   elements->set_length(length);
   memset(elements->DataPtr(), 0, elements->DataSize());
   return elements;
 }
 
 
 AllocationResult Heap::AllocateCode(int object_size, bool immovable) {
   DCHECK(IsAligned(static_cast<intptr_t>(object_size), kCodeAlignment));
@@ skipping 694 matching lines @@
 
   elements->set_map_no_write_barrier(fixed_double_array_map());
   FixedDoubleArray::cast(elements)->set_length(length);
   return elements;
 }
 
 
 AllocationResult Heap::AllocateRawFixedDoubleArray(int length,
                                                    PretenureFlag pretenure) {
   if (length < 0 || length > FixedDoubleArray::kMaxLength) {
-    v8::internal::Heap::FatalProcessOutOfMemory("invalid array length", true);
+    v8::internal::Heap::FatalProcessOutOfMemory("invalid array length",
+                                                kDoubleWordAligned);
   }
   int size = FixedDoubleArray::SizeFor(length);
-#ifndef V8_HOST_ARCH_64_BIT
-  size += kPointerSize;
-#endif
   AllocationSpace space = SelectSpace(size, pretenure);
 
   HeapObject* object;
   {
-    AllocationResult allocation = AllocateRaw(size, space, OLD_SPACE);
+    AllocationResult allocation =
+        AllocateRaw(size, space, OLD_SPACE, kDoubleWordAligned);
     if (!allocation.To(&object)) return allocation;
   }
 
-  return EnsureDoubleAligned(object, size);
+  return object;
 }
 
 
 AllocationResult Heap::AllocateConstantPoolArray(
     const ConstantPoolArray::NumberOfEntries& small) {
   CHECK(small.are_in_range(0, ConstantPoolArray::kMaxSmallEntriesPerType));
   int size = ConstantPoolArray::SizeFor(small);
-#ifndef V8_HOST_ARCH_64_BIT
-  size += kPointerSize;
-#endif
   AllocationSpace space = SelectSpace(size, TENURED);
 
   HeapObject* object;
   {
-    AllocationResult allocation = AllocateRaw(size, space, OLD_SPACE);
+    AllocationResult allocation =
+        AllocateRaw(size, space, OLD_SPACE, kDoubleWordAligned);
     if (!allocation.To(&object)) return allocation;
   }
-  object = EnsureDoubleAligned(object, size);
   object->set_map_no_write_barrier(constant_pool_array_map());
 
   ConstantPoolArray* constant_pool = ConstantPoolArray::cast(object);
   constant_pool->Init(small);
   constant_pool->ClearPtrEntries(isolate());
   return constant_pool;
 }
 
 
 AllocationResult Heap::AllocateExtendedConstantPoolArray(
     const ConstantPoolArray::NumberOfEntries& small,
     const ConstantPoolArray::NumberOfEntries& extended) {
   CHECK(small.are_in_range(0, ConstantPoolArray::kMaxSmallEntriesPerType));
   CHECK(extended.are_in_range(0, kMaxInt));
   int size = ConstantPoolArray::SizeForExtended(small, extended);
-#ifndef V8_HOST_ARCH_64_BIT
-  size += kPointerSize;
-#endif
   AllocationSpace space = SelectSpace(size, TENURED);
 
   HeapObject* object;
   {
-    AllocationResult allocation = AllocateRaw(size, space, OLD_SPACE);
+    AllocationResult allocation =
+        AllocateRaw(size, space, OLD_SPACE, kDoubleWordAligned);
     if (!allocation.To(&object)) return allocation;
   }
-  object = EnsureDoubleAligned(object, size);
   object->set_map_no_write_barrier(constant_pool_array_map());
 
   ConstantPoolArray* constant_pool = ConstantPoolArray::cast(object);
   constant_pool->InitExtended(small, extended);
   constant_pool->ClearPtrEntries(isolate());
   return constant_pool;
 }
 
 
 AllocationResult Heap::AllocateEmptyConstantPoolArray() {
@@ skipping 2029 matching lines @@
       }
       delete list;
     } else {
       prev = list;
     }
     list = next;
   }
 }
 }
 }  // namespace v8::internal