[turbofan] Performance enhancements for escape analysis

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 1146 matching lines @@
     // Lower JSOperators where we can determine types.
     Run<TypedLoweringPhase>();
     RunPrintAndVerify("Lowered typed");
 
     if (FLAG_turbo_stress_loop_peeling) {
       Run<StressLoopPeelingPhase>();
       RunPrintAndVerify("Loop peeled");
     }
 
     if (FLAG_turbo_escape) {
-      // TODO(sigurds): EscapeAnalysis needs a trimmed graph at the moment,
-      // because it does a forwards traversal of the effect edges.
-      Run<EarlyGraphTrimmingPhase>();

[Michael Starzinger, 2016/01/12 17:27:44]

Woot, I like it!

       Run<EscapeAnalysisPhase>();
       RunPrintAndVerify("Escape Analysed");
     }
 
     // Lower simplified operators and insert changes.
     Run<SimplifiedLoweringPhase>();
     RunPrintAndVerify("Lowered simplified");
 
     Run<BranchEliminationPhase>();
     RunPrintAndVerify("Branch conditions eliminated");
@@ skipping 300 matching lines @@
     tcf << AsC1VRegisterAllocationData("CodeGen",
                                        data->register_allocation_data());
   }
 
   data->DeleteRegisterAllocationZone();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8