Preserve LICM information for check instructions during assertion strengthening.

runtime/vm/flow_graph_type_propagator.cc

Index: runtime/vm/flow_graph_type_propagator.cc
diff --git a/runtime/vm/flow_graph_type_propagator.cc b/runtime/vm/flow_graph_type_propagator.cc
index 1138c6a20c562577a773ce53cb6d3d58371f792e..d0ffe7707e57d67f1eb6093a54c55ddaaffc28af 100644
--- a/runtime/vm/flow_graph_type_propagator.cc
+++ b/runtime/vm/flow_graph_type_propagator.cc
@@ -356,6 +356,8 @@ void FlowGraphTypePropagator::StrengthenAssertWith(Instruction* check) {
         new CheckSmiInstr(assert->value()->Copy(zone()),
                           assert->env()->deopt_id(),
                           check->token_pos());
+    check_clone->AsCheckSmi()->set_licm_hoisted(
+        check->AsCheckSmi()->licm_hoisted());
   } else {
     ASSERT(check->IsCheckClass());
     check_clone =
@@ -363,6 +365,8 @@ void FlowGraphTypePropagator::StrengthenAssertWith(Instruction* check) {
                             assert->env()->deopt_id(),
                             check->AsCheckClass()->unary_checks(),
                             check->token_pos());
+    check_clone->AsCheckClass()->set_licm_hoisted(
+        check->AsCheckClass()->licm_hoisted());
   }
   ASSERT(check_clone != NULL);
   ASSERT(assert->deopt_id() == assert->env()->deopt_id());