Add is_inlinable field to functions.

runtime/vm/flow_graph_inliner.cc

Index: runtime/vm/flow_graph_inliner.cc
diff --git a/runtime/vm/flow_graph_inliner.cc b/runtime/vm/flow_graph_inliner.cc
index c60ee6d788403975ea86a1d4619d8604e09abac1..ff9652428dd6a22553a026fe1e561be4d91ce80b 100644
--- a/runtime/vm/flow_graph_inliner.cc
+++ b/runtime/vm/flow_graph_inliner.cc
@@ -41,6 +41,12 @@ class CallSiteInliner : public FlowGraphVisitor {
                    Definition* call) {
     TRACE_INLINING(OS::Print("  => %s\n", function.ToCString()));
 
+    // Abort if the inlinable bit on the function is low.
+    if (!function.is_inlinable()) {
+      TRACE_INLINING(OS::Print("     Bailout: not inlinable\n"));
+      return false;
+    }
+
     // Abort if the callee has optional parameters.
     if (function.HasOptionalParameters()) {
       TRACE_INLINING(OS::Print("     Bailout: optional parameters\n"));
@@ -52,6 +58,7 @@ class CallSiteInliner : public FlowGraphVisitor {
 
     // Abort if the callee has an intrinsic translation.
     if (Intrinsifier::CanIntrinsify(function)) {
+      function.set_is_inlinable(false);
       TRACE_INLINING(OS::Print("     Bailout: can intrinsify\n"));
       return false;
     }
@@ -89,6 +96,7 @@ class CallSiteInliner : public FlowGraphVisitor {
 
       // Abort if the callee graph contains control flow.
       if (callee_graph->preorder().length() != 2) {
+        function.set_is_inlinable(false);
         isolate->set_long_jump_base(base);
         isolate->set_ic_data_array(prev_ic_data.raw());
         TRACE_INLINING(OS::Print("     Bailout: control flow\n"));