VM: Enable collection of unoptimized code for optimized functions.

runtime/vm/compiler.cc

Index: runtime/vm/compiler.cc
===================================================================
--- runtime/vm/compiler.cc	(revision 44959)
+++ runtime/vm/compiler.cc	(working copy)
@@ -976,6 +976,12 @@
     TIMERSCOPE(isolate, time_compilation);
     Timer per_compile_timer(FLAG_trace_compiler, "Compilation time");
     per_compile_timer.Start();
+
+    // Restore unoptimized code if needed.
+    if (optimized) {

[Vyacheslav Egorov (Google), 2015/04/09 12:23:07]

Why do we need to restore unoptimized code for optimized compilation?

If it's only for edge counters then they'll be zeroed?

We need to sanitize that.

[Florian Schneider, 2015/04/09 14:48:38]

Agree. Do you want me to do that in this CL?

+      Compiler::EnsureUnoptimizedCode(Thread::Current(), function);
+    }
+
     ParsedFunction* parsed_function = new(zone) ParsedFunction(
         thread, Function::ZoneHandle(zone, function.raw()));
     if (FLAG_trace_compiler) {