[turbofan] Split ConstraintBuilder off of LiveRangeBuilder.

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/platform/elapsed-timer.h"
@@ skipping 698 matching lines @@
                                  data->source_positions());
     selector.SelectInstructions();
   }
 };
 
 
 struct MeetRegisterConstraintsPhase {
   static const char* phase_name() { return "meet register constraints"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    LiveRangeBuilder builder(data->register_allocation_data());
+    ConstraintBuilder builder(data->register_allocation_data());
     builder.MeetRegisterConstraints();
   }
 };
 
 
 struct ResolvePhisPhase {
   static const char* phase_name() { return "resolve phis"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
-    LiveRangeBuilder builder(data->register_allocation_data());
+    ConstraintBuilder builder(data->register_allocation_data());
     builder.ResolvePhis();
   }
 };
 
 
 struct BuildLiveRangesPhase {
   static const char* phase_name() { return "build live ranges"; }
 
   void Run(PipelineData* data, Zone* temp_zone) {
     LiveRangeBuilder builder(data->register_allocation_data());
@@ skipping 558 matching lines @@
     tcf << AsC1VRegisterAllocationData("CodeGen",
                                        data->register_allocation_data());
   }
 
   data->DeleteRegisterAllocationZone();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8