--- old/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp	2019-01-15 22:00:07.052496489 -0800
+++ new/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp	2019-01-15 22:00:06.864489578 -0800
@@ -3479,7 +3479,8 @@
     assert(BasicLock::displaced_header_offset_in_bytes() == 0, "lock_reg must point to the displaced header");
     __ resolve(ACCESS_READ | ACCESS_WRITE, obj);
     // add debug info for NullPointerException only if one is possible
-    int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry());
+    bool check_always_locked = (op->throw_imse_stub() != NULL);
+    int null_check_offset = __ lock_object(hdr, obj, lock, scratch, *op->stub()->entry(), check_always_locked);
     if (op->info() != NULL) {
       add_debug_info_for_null_check(null_check_offset, op->info());
     }