[XLA:HOST_OFFLOAD] Add Copy to the list of movable opcodes between ho…

…st to

device and dynamic slice.

PiperOrigin-RevId: 610968466

third_party/xla/xla/service/host_offloader.cc

@@ -157,7 +157,8 @@ absl::StatusOr<std::vector<HloInstruction*>> GetBufferUsersOfType(
 // And the buffer is passed through the first operand.
 // This is used to trace the graph between an annotation and its relevant slice.
 bool CanTraverseOpBetweenAnnotation(HloInstruction* hlo) {
-  if (hlo->opcode() == HloOpcode::kBitcast) {
+  if (hlo->opcode() == HloOpcode::kBitcast ||
+      hlo->opcode() == HloOpcode::kCopy) {
     return true;
   } else if (hlo->opcode() == HloOpcode::kReshape) {
     return ShapeUtil::ReshapeIsBitcast(hlo->operand(0)->shape(), hlo->shape());