[turbofan] initial framework for unittesting of register allocator

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 520 matching lines @@
   DCHECK_NOT_NULL(data->graph());
   DCHECK_NOT_NULL(data->schedule());
   CHECK(SupportedBackend());
 
   BasicBlockProfiler::Data* profiler_data = NULL;
   if (FLAG_turbo_profiling) {
     profiler_data = BasicBlockInstrumentor::Instrument(info(), data->graph(),
                                                        data->schedule());
   }
 
-  InstructionSequence sequence(data->instruction_zone(), data->schedule());
+  InstructionBlocks* instruction_blocks =
+      InstructionSequence::InstructionBlocksFor(data->instruction_zone(),
+                                                data->schedule());
+  InstructionSequence sequence(data->instruction_zone(), instruction_blocks);
 
   // Select and schedule instructions covering the scheduled graph.
   {
     PhaseScope phase_scope(data->pipeline_statistics(), "select instructions");
     ZonePool::Scope zone_scope(data->zone_pool());
     InstructionSelector selector(zone_scope.zone(), data->graph(), linkage,
                                  &sequence, data->schedule(),
                                  data->source_positions());
     selector.SelectInstructions();
   }
@@ skipping 75 matching lines @@
 }
 
 
 void Pipeline::TearDown() {
   InstructionOperand::TearDownCaches();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8