Add more timing information.

runtime/vm/flow_graph_compiler_x64.cc

Index: runtime/vm/flow_graph_compiler_x64.cc
===================================================================
--- runtime/vm/flow_graph_compiler_x64.cc	(revision 6695)
+++ runtime/vm/flow_graph_compiler_x64.cc	(working copy)
@@ -1599,6 +1599,7 @@
 // TODO(srdjan): Investigate where to put the argument type checks for
 // checked mode.
 void FlowGraphCompiler::CompileGraph() {
+  TimerScope timer(FLAG_compiler_stats, &CompilerStats::graphcompiler_timer);
   if (TryIntrinsify()) {
     // Make it patchable: code must have a minimum code size, nop(2) increases
     // the minimum code size appropriately.
@@ -1732,6 +1733,12 @@
 }
 
 
+void FlowGraphCompiler::FinalizeStackmaps(const Code& code) {
+  // TODO(srdjan): Compute stack maps for optimizing compiler.
+  code.set_stackmaps(Array::Handle());
+}
+
+
 void FlowGraphCompiler::FinalizeVarDescriptors(const Code& code) {
   const LocalVarDescriptors& var_descs = LocalVarDescriptors::Handle(
           parsed_function_.node_sequence()->scope()->GetVarDescriptors());