diff -r d3aefa77da6c -r 910b77f150c4 src/cpu/mips/vm/mips_64.ad
--- a/src/cpu/mips/vm/mips_64.ad	Thu Mar 30 08:45:59 2017 -0400
+++ b/src/cpu/mips/vm/mips_64.ad	Fri Mar 31 12:43:02 2017 -0400
@@ -12089,10 +12089,8 @@
   ins_encode %{
     Register src = $src$$Register;
     Register dst = $dst$$Register;
-    if (src != dst) {
-      __ move(dst, src);
-    }
-    __ encode_heap_oop(dst);
+
+    __ encode_heap_oop(dst, src);
   %}
   ins_pipe( ialu_regL_regL );
 %}
@@ -12115,10 +12113,8 @@
   ins_encode %{
     Register s = $src$$Register;
     Register d = $dst$$Register;
-    if (s != d) {
-      __ move(d, s);
-    }
-    __ decode_heap_oop(d);
+
+    __ decode_heap_oop(d, s);
   %}
   ins_pipe( ialu_regL_regL );
 %}