[turbofan] Initial version of number type feedback.

src/compiler/pipeline.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/base/adapters.h"
@@ skipping 864 matching lines @@
     JSCreateLowering create_lowering(
         &graph_reducer, data->info()->dependencies(), data->jsgraph(),
         literals_array, temp_zone);
     JSTypedLowering::Flags typed_lowering_flags = JSTypedLowering::kNoFlags;
     if (data->info()->is_deoptimization_enabled()) {
       typed_lowering_flags |= JSTypedLowering::kDeoptimizationEnabled;
     }
     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);
     JSIntrinsicLowering intrinsic_lowering(
         &graph_reducer, data->jsgraph(),
         data->info()->is_deoptimization_enabled()
             ? JSIntrinsicLowering::kDeoptimizationEnabled
             : JSIntrinsicLowering::kDeoptimizationDisabled);
     SimplifiedOperatorReducer simple_reducer(data->jsgraph());
     CommonOperatorReducer common_reducer(&graph_reducer, data->graph(),
@@ skipping 42 matching lines @@
     AddReducer(data, &graph_reducer, &escape_reducer);
     graph_reducer.ReduceGraph();
     escape_reducer.VerifyReplacement();
   }
 };
 
 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();
   }
 };
 
 struct EarlyOptimizationPhase {
   static const char* phase_name() { return "early optimization"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
     JSGraphReducer graph_reducer(data->jsgraph(), temp_zone);
     JSGenericLowering generic_lowering(data->jsgraph());
@@ skipping 837 matching lines @@
   data->DeleteRegisterAllocationZone();
 }
 
 CompilationInfo* PipelineImpl::info() const { return data_->info(); }
 
 Isolate* PipelineImpl::isolate() const { return info()->isolate(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8