--- old/src/cpu/x86/vm/globals_x86.hpp	2017-03-06 09:06:43.602041213 +0100
+++ new/src/cpu/x86/vm/globals_x86.hpp	2017-03-06 09:06:43.538041216 +0100
@@ -97,6 +97,8 @@
 
 define_pd_global(bool, PreserveFramePointer, false);
 
+define_pd_global(bool, ValueTypePassFieldsAsArgs, LP64_ONLY(true) NOT_LP64(false));
+
 #define ARCH_FLAGS(develop, product, diagnostic, experimental, notproduct, range, constraint) \
                                                                             \
   develop(bool, IEEEPrecision, true,                                        \