Add source position information to profile

runtime/vm/compiler.cc

Index: runtime/vm/compiler.cc
diff --git a/runtime/vm/compiler.cc b/runtime/vm/compiler.cc
index 5d5be9a44306b5900749c8b5337106e77c1c8013..eb2b6a3bcc93943104fbca77f2193420acc0e47b 100644
--- a/runtime/vm/compiler.cc
+++ b/runtime/vm/compiler.cc
@@ -701,7 +701,10 @@ bool CompileParsedFunctionHelper::Compile(CompilationPipeline* pipeline) {
                                                  compiler_timeline,
                                                  "OptimizationPasses"));
         inline_id_to_function.Add(&function);
-        inline_id_to_token_pos.Add(function.token_pos());
+        // We do not add the token position now because we don't know the

[srdjan, 2016/03/02 19:02:55]

Maybe add comment that we expect all token positions to be at a call.

[Cutch, 2016/03/02 19:14:07]

Done.

+        // position of the inlined call until later. A side effect of this
+        // is that the length of |inline_id_to_function| is always larger
+        // than the length of |inline_id_to_token_pos| by one.
         // Top scope function has no caller (-1).
         caller_inline_id.Add(-1);
         CSTAT_TIMER_SCOPE(thread(), graphoptimizer_timer);