8292713: Unsafe.allocateInstance should be intrinsified without UseUnalignedAccesses

Reviewed-by: psandoz, kvn, fyang

Author: shipilev

src/hotspot/share/classfile/vmIntrinsics.cpp

@@ -419,6 +419,7 @@ bool vmIntrinsics::disabled_by_jvm_flags(vmIntrinsics::ID id) {
   case vmIntrinsics::_compareAndExchangeReference:
   case vmIntrinsics::_compareAndExchangeReferenceAcquire:
   case vmIntrinsics::_compareAndExchangeReferenceRelease:
+  case vmIntrinsics::_allocateInstance:
     if (!InlineUnsafeOps) return true;
     break;
   case vmIntrinsics::_getShortUnaligned:
@@ -429,7 +430,6 @@ bool vmIntrinsics::disabled_by_jvm_flags(vmIntrinsics::ID id) {
   case vmIntrinsics::_putCharUnaligned:
   case vmIntrinsics::_putIntUnaligned:
   case vmIntrinsics::_putLongUnaligned:
-  case vmIntrinsics::_allocateInstance:
     if (!InlineUnsafeOps || !UseUnalignedAccesses) return true;
     break;
   case vmIntrinsics::_hashCode: