[turbofan] split register allocator into little pieces

src/compiler/graph-visualizer.h

Index: src/compiler/graph-visualizer.h
diff --git a/src/compiler/graph-visualizer.h b/src/compiler/graph-visualizer.h
index 17094c23c57c37a93433565bbfba91aa193f1c97..aad7f8cc4b26a42bbceaef06533e4ccfb80b858c 100644
--- a/src/compiler/graph-visualizer.h
+++ b/src/compiler/graph-visualizer.h
@@ -16,7 +16,7 @@ namespace compiler {
 
 class Graph;
 class InstructionSequence;
-class RegisterAllocator;
+class LiveRangeBuilder;
 class Schedule;
 class SourcePositionTable;
 
@@ -67,18 +67,18 @@ struct AsC1V {
   const char* phase_;
 };
 
-struct AsC1VAllocator {
-  explicit AsC1VAllocator(const char* phase,
-                          const RegisterAllocator* allocator = NULL)
-      : phase_(phase), allocator_(allocator) {}
+struct AsC1VLiveRangeBuilder {
+  explicit AsC1VLiveRangeBuilder(
+      const char* phase, const LiveRangeBuilder* live_range_builder = nullptr)
+      : phase_(phase), live_range_builder_(live_range_builder) {}
   const char* phase_;
-  const RegisterAllocator* allocator_;
+  const LiveRangeBuilder* live_range_builder_;
 };
 
 std::ostream& operator<<(std::ostream& os, const AsDOT& ad);
 std::ostream& operator<<(std::ostream& os, const AsC1VCompilation& ac);
 std::ostream& operator<<(std::ostream& os, const AsC1V& ac);
-std::ostream& operator<<(std::ostream& os, const AsC1VAllocator& ac);
+std::ostream& operator<<(std::ostream& os, const AsC1VLiveRangeBuilder& ac);
 
 }  // namespace compiler
 }  // namespace internal