Generate array allocation stub before ic call stubs to fix --lazy-dispatchers=false.

runtime/vm/flow_graph_compiler.cc

Index: runtime/vm/flow_graph_compiler.cc
diff --git a/runtime/vm/flow_graph_compiler.cc b/runtime/vm/flow_graph_compiler.cc
index fcba8813107dbededd3908fcee91237857343e60..4e19dc3d9a9e39b6d3632c4e2dda88a255c66e8e 100644
--- a/runtime/vm/flow_graph_compiler.cc
+++ b/runtime/vm/flow_graph_compiler.cc
@@ -103,6 +103,26 @@ DEFINE_FLAG_HANDLER(NooptModeHandler,
                     "Run fast unoptimized code only.");
 
 
+DECLARE_FLAG(bool, lazy_dispatchers);
+DECLARE_FLAG(bool, interpret_irregexp);
+DECLARE_FLAG(bool, enable_mirrors);
+
+
+static void PrecompileModeHandler(bool value) {
+  if (value) {
+    NooptModeHandler(true);
+    FLAG_lazy_dispatchers = false;
+    FLAG_interpret_irregexp = true;
+    FLAG_enable_mirrors = false;
+  }
+}
+
+
+DEFINE_FLAG_HANDLER(PrecompileModeHandler,
+                    precompile,
+                    "Precompilation mode");
+
+
 // Assign locations to incoming arguments, i.e., values pushed above spill slots
 // with PushArgument.  Recursively allocates from outermost to innermost
 // environment.