Continue learning for calls in optimized code when we have no type feedback.

src/hydrogen.cc

 // Copyright 2013 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/hydrogen.h"
 
 #include <sstream>
 
 #include "src/v8.h"
 
@@ skipping 9330 matching lines @@
 
       if (TryInlineCall(expr)) return;
 
       call = PreProcessCall(New<HInvokeFunction>(
           function, expr->target(), argument_count));
 
     } else {
       Push(graph()->GetConstantUndefined());
       CHECK_ALIVE(VisitExpressions(expr->arguments()));
       PushArgumentsFromEnvironment(argument_count);
-      call = New<HCallFunction>(function, argument_count);
+      HCallFunction* call_function =
+          New<HCallFunction>(function, argument_count);
+      call = call_function;
+      if (expr->is_uninitialized() && expr->HasCallFeedbackSlot()) {
+        // We've never seen this call before, so let's have Crankshaft learn
+        // through the type vector.
+        Handle<SharedFunctionInfo> current_shared =
+            function_state()->compilation_info()->shared_info();
+        Handle<TypeFeedbackVector> vector =
+            handle(current_shared->feedback_vector(), isolate());
+        FeedbackVectorICSlot slot = expr->CallFeedbackSlot();
+        call_function->SetVectorAndSlot(vector, slot);
+      }
     }
   }
 
   Drop(1);  // Drop the function.
   return ast_context()->ReturnInstruction(call, expr->id());
 }
 
 
 void HOptimizedGraphBuilder::BuildInlinedCallArray(
     Expression* expression,
@@ skipping 4108 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal