[turbofan] Frame elision only for stubs.

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 1423 matching lines @@
     Run<AllocateDoubleRegistersPhase<GreedyAllocator>>();
   } else {
     Run<AllocateGeneralRegistersPhase<LinearScanAllocator>>();
     Run<AllocateDoubleRegistersPhase<LinearScanAllocator>>();
   }
 
   if (FLAG_turbo_preprocess_ranges) {
     Run<MergeSplintersPhase>();
   }
 
-  if (FLAG_turbo_frame_elision) {
+  // We plan to enable frame elision only for stubs and bytecode handlers.
+  if (FLAG_turbo_frame_elision && info()->IsStub()) {

[Mircea Trofin, 2016/01/28 02:39:10]

Is there a way to check this is a bytecode handler yet, or is "IsStub" covering
that?

     Run<LocateSpillSlotsPhase>();
     Run<FrameElisionPhase>();
   }
 
   Run<AssignSpillSlotsPhase>();
 
   Run<CommitAssignmentPhase>();
   Run<PopulateReferenceMapsPhase>();
   Run<ConnectRangesPhase>();
   Run<ResolveControlFlowPhase>();
@@ skipping 18 matching lines @@
     tcf << AsC1VRegisterAllocationData("CodeGen",
                                        data->register_allocation_data());
   }
 
   data->DeleteRegisterAllocationZone();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8