MIPS: Ensure proper alignment of LazyInstance objects.

src/lazy-instance.h

Index: src/lazy-instance.h
diff --git a/src/lazy-instance.h b/src/lazy-instance.h
index 09dfe2154dc2992305a0b04787d8c3cca3391193..9748bb522996037e6069b5ed29a5a1f2b4530574 100644
--- a/src/lazy-instance.h
+++ b/src/lazy-instance.h
@@ -104,9 +104,15 @@ struct LeakyInstanceTrait {
 
 // Traits that define how an instance is allocated and accessed.
 
+#if V8_HOST_ARCH_MIPS

[danno, 2012/03/16 12:40:08]

I'd prefer avoiding the platform-specific define. Is there a more general test
about the target architecture that can determine if this is needed? Is it
harmful to have this always present for GCC-based builds?

+#define LAZY_ALIGN(x) __attribute__((aligned(__alignof__(x))))
+#else  // V8_HOST_ARCH_MIPS
+#define LAZY_ALIGN(x)
+#endif
+
 template <typename T>
 struct StaticallyAllocatedInstanceTrait {
-  typedef char StorageType[sizeof(T)];
+  typedef char StorageType[sizeof(T)] LAZY_ALIGN(T);
 
   static T* MutableInstance(StorageType* storage) {
     return reinterpret_cast<T*>(storage);