Fix speculative inlining in precompilation.

runtime/vm/flow_graph_builder.cc

Index: runtime/vm/flow_graph_builder.cc
diff --git a/runtime/vm/flow_graph_builder.cc b/runtime/vm/flow_graph_builder.cc
index 98c184685cd5564ce476ff84af2a2e9bc66bb1ff..d1e0b857c40340aed606382fbb1d3d87c7f6896a 100644
--- a/runtime/vm/flow_graph_builder.cc
+++ b/runtime/vm/flow_graph_builder.cc
@@ -2806,6 +2806,9 @@ void EffectGraphVisitor::VisitConstructorCallNode(ConstructorCallNode* node) {
       // (0) type-arguments, (1) length.
       ASSERT(!LoadFieldInstr::IsFixedLengthArrayCid(result_cid) ||
              arguments->length() == 2);
+    } else if (node->constructor().recognized_kind() !=
+               MethodRecognizer::kUnknown) {
+      call->set_result_cid(MethodRecognizer::ResultCid(node->constructor()));
     }
     ReturnDefinition(call);
     return;