--- a/src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp	Wed May 08 08:15:04 2019 +0100
+++ b/src/hotspot/cpu/aarch64/stubGenerator_aarch64.cpp	Wed May 08 11:59:14 2019 +0200
@@ -1788,7 +1788,7 @@
     }
 #endif //ASSERT
 
-    DecoratorSet decorators = IN_HEAP | IS_ARRAY | ARRAYCOPY_CHECKCAST;
+    DecoratorSet decorators = IN_HEAP | IS_ARRAY | ARRAYCOPY_CHECKCAST | ARRAYCOPY_DISJOINT;
     bool is_oop = true;
     if (dest_uninitialized) {
       decorators |= IS_DEST_UNINITIALIZED;

--- a/src/hotspot/cpu/x86/gc/shared/modRefBarrierSetAssembler_x86.cpp	Wed May 08 08:15:04 2019 +0100
+++ b/src/hotspot/cpu/x86/gc/shared/modRefBarrierSetAssembler_x86.cpp	Wed May 08 11:59:14 2019 +0200
@@ -36,12 +36,14 @@
 
   if (type == T_OBJECT || type == T_ARRAY) {
 #ifdef _LP64
-    if (!checkcast && !obj_int) {
-      // Save count for barrier
-      __ movptr(r11, count);
-    } else if (disjoint && obj_int) {
-      // Save dst in r11 in the disjoint case
-      __ movq(r11, dst);
+    if (!checkcast) {
+      if (!obj_int) {
+        // Save count for barrier
+        __ movptr(r11, count);
+      } else if (disjoint) {
+        // Save dst in r11 in the disjoint case
+        __ movq(r11, dst);
+      }
     }
 #else
     if (disjoint) {
@@ -61,13 +63,15 @@
 
   if (type == T_OBJECT || type == T_ARRAY) {
 #ifdef _LP64
-    if (!checkcast && !obj_int) {
-      // Save count for barrier
-      count = r11;
-    } else if (disjoint && obj_int) {
-      // Use the saved dst in the disjoint case
-      dst = r11;
-    } else if (checkcast) {
+    if (!checkcast) {
+      if (!obj_int) {
+        // Save count for barrier
+        count = r11;
+      } else if (disjoint) {
+        // Use the saved dst in the disjoint case
+        dst = r11;
+      }
+    } else {
       tmp = rscratch1;
     }
 #else

--- a/src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.cpp	Wed May 08 08:15:04 2019 +0100
+++ b/src/hotspot/cpu/x86/gc/shenandoah/shenandoahBarrierSetAssembler_x86.cpp	Wed May 08 11:59:14 2019 +0200
@@ -53,12 +53,14 @@
 
   if (type == T_OBJECT || type == T_ARRAY) {
 #ifdef _LP64
-    if (!checkcast && !obj_int) {
-      // Save count for barrier
-      __ movptr(r11, count);
-    } else if (disjoint && obj_int) {
-      // Save dst in r11 in the disjoint case
-      __ movq(r11, dst);
+    if (!checkcast) {
+      if (!obj_int) {
+        // Save count for barrier
+        __ movptr(r11, count);
+      } else if (disjoint) {
+        // Save dst in r11 in the disjoint case
+        __ movq(r11, dst);
+      }
     }
 #else
     if (disjoint) {
@@ -123,13 +125,15 @@
 
   if (type == T_OBJECT || type == T_ARRAY) {
 #ifdef _LP64
-    if (!checkcast && !obj_int) {
-      // Save count for barrier
-      count = r11;
-    } else if (disjoint && obj_int) {
-      // Use the saved dst in the disjoint case
-      dst = r11;
-    } else if (checkcast) {
+    if (!checkcast) {
+      if (!obj_int) {
+        // Save count for barrier
+        count = r11;
+      } else if (disjoint && obj_int) {
+        // Use the saved dst in the disjoint case
+        dst = r11;
+      }
+    } else {
       tmp = rscratch1;
     }
 #else

--- a/src/hotspot/cpu/x86/stubGenerator_x86_64.cpp	Wed May 08 08:15:04 2019 +0100
+++ b/src/hotspot/cpu/x86/stubGenerator_x86_64.cpp	Wed May 08 11:59:14 2019 +0200
@@ -2183,7 +2183,7 @@
                                    // r9 is used to save r15_thread
     // 'from', 'to' and 'qword_count' are now valid
 
-    DecoratorSet decorators = IN_HEAP | IS_ARRAY | ARRAYCOPY_DISJOINT;
+    DecoratorSet decorators = IN_HEAP | IS_ARRAY;
     if (dest_uninitialized) {
       decorators |= IS_DEST_UNINITIALIZED;
     }
@@ -2377,7 +2377,7 @@
     Address from_element_addr(end_from, count, TIMES_OOP, 0);
     Address   to_element_addr(end_to,   count, TIMES_OOP, 0);
 
-    DecoratorSet decorators = IN_HEAP | IS_ARRAY | ARRAYCOPY_CHECKCAST;
+    DecoratorSet decorators = IN_HEAP | IS_ARRAY | ARRAYCOPY_CHECKCAST | ARRAYCOPY_DISJOINT;
     if (dest_uninitialized) {
       decorators |= IS_DEST_UNINITIALIZED;
     }