8292713: Unsafe.allocateInstance should be intrinsified without UseUnalignedAccesses

Backport-of: c0623972cffdbcd7f80e84a1ec344fd382a4a5cc

Author: shipilev

src/hotspot/share/classfile/vmIntrinsics.cpp

@@ -397,6 +397,7 @@ 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:
@@ -407,7 +408,6 @@ 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: