[turbofan] Initial version of number type feedback.

src/compiler/pipeline.cc

Index: src/compiler/pipeline.cc
diff --git a/src/compiler/pipeline.cc b/src/compiler/pipeline.cc
index 52b30dd6ecd4c12a36b360d18d07e44b74b25192..5a10b0caaff97b79be0bc0c615360f34fc7109bd 100644
--- a/src/compiler/pipeline.cc
+++ b/src/compiler/pipeline.cc
@@ -882,6 +882,9 @@ struct TypedLoweringPhase {
     if (data->info()->shared_info()->HasBytecodeArray()) {
       typed_lowering_flags |= JSTypedLowering::kDisableBinaryOpReduction;
     }
+    if (FLAG_turbo_type_feedback) {

[Benedikt Meurer, 2016/05/30 18:39:50]

Can you add a CompilationInfo flag for this?

[Jarin, 2016/05/31 20:28:53]

Done.

+      typed_lowering_flags |= JSTypedLowering::kTypeFeedbackEnabled;
+    }
     JSTypedLowering typed_lowering(&graph_reducer, data->info()->dependencies(),
                                    typed_lowering_flags, data->jsgraph(),
                                    temp_zone);
@@ -944,8 +947,11 @@ struct RepresentationSelectionPhase {
   static const char* phase_name() { return "representation selection"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
+    SimplifiedLowering::Flags flags =
+        FLAG_turbo_type_feedback ? SimplifiedLowering::kTypeFeedbackEnabled

[Benedikt Meurer, 2016/05/30 18:39:50]

See comment above.

+                                 : SimplifiedLowering::kNoFlag;
     SimplifiedLowering lowering(data->jsgraph(), temp_zone,
-                                data->source_positions());
+                                data->source_positions(), flags);
     lowering.LowerAllNodes();
   }
 };