[turbofan] Stand-alone deferred block splitting - full.

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 1319 matching lines @@
        << printable;
   }
   if (verifier != nullptr) {
     CHECK(!data->register_allocation_data()->ExistsUseWithoutDefinition());
   }
 
   if (FLAG_turbo_preprocess_ranges) {
     Run<PreprocessLiveRangesPhase>();
   }
 
-  if (FLAG_turbo_greedy_regalloc) {
-    Run<AllocateGeneralRegistersPhase<GreedyAllocator>>();
-    Run<AllocateDoubleRegistersPhase<GreedyAllocator>>();
-  } else {
-    Run<AllocateGeneralRegistersPhase<LinearScanAllocator>>();
-    Run<AllocateDoubleRegistersPhase<LinearScanAllocator>>();
-  }
+  // TODO(mtrofin): re-enable greedy once we have bots for range preprocessing.
+  Run<AllocateGeneralRegistersPhase<LinearScanAllocator>>();
+  Run<AllocateDoubleRegistersPhase<LinearScanAllocator>>();
 
   if (FLAG_turbo_frame_elision) {
     Run<LocateSpillSlotsPhase>();
     Run<FrameElisionPhase>();
   }
 
   Run<AssignSpillSlotsPhase>();
 
   Run<CommitAssignmentPhase>();
   Run<PopulateReferenceMapsPhase>();
@@ skipping 20 matching lines @@
     tcf << AsC1VRegisterAllocationData("CodeGen",
                                        data->register_allocation_data());
   }
 
   data->DeleteRegisterAllocationZone();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8