--- a/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp	Wed May 22 06:29:08 2019 -0400
+++ b/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp	Thu May 23 07:57:50 2019 -0400
@@ -2268,7 +2268,7 @@
     __ ldr(src,              Address(sp, 4*BytesPerWord));
 
     // r0 is -1^K where K == partial copied count
-    __ eonw(rscratch1, r0, 0);
+    __ eonw(rscratch1, r0, zr);
     // adjust length down and src/end pos up by partial copied count
     __ subw(length, length, rscratch1);
     __ addw(src_pos, src_pos, rscratch1);