--- old/src/hotspot/cpu/x86/globals_x86.hpp	2019-03-11 14:24:53.338356162 +0100
+++ new/src/hotspot/cpu/x86/globals_x86.hpp	2019-03-11 14:24:53.138356165 +0100
@@ -102,6 +102,9 @@
 define_pd_global(bool, ThreadLocalHandshakes, false);
 #endif
 
+define_pd_global(bool, ValueTypePassFieldsAsArgs, LP64_ONLY(true) NOT_LP64(false));
+define_pd_global(bool, ValueTypeReturnedAsFields, LP64_ONLY(true) NOT_LP64(false));
+
 #define ARCH_FLAGS(develop, \
                    product, \
                    diagnostic, \