Move FlowGraphPrinter to a new file.

vm/il_printer.h

Index: vm/il_printer.h
===================================================================
--- vm/il_printer.h	(revision 0)
+++ vm/il_printer.h	(revision 0)
@@ -0,0 +1,50 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#ifndef VM_IL_PRINTER_H_
+#define VM_IL_PRINTER_H_
+
+#include "vm/intermediate_language.h"
+
+namespace dart {
+
+// Graph printing.
+class FlowGraphPrinter : public FlowGraphVisitor {
+ public:
+  FlowGraphPrinter(const Function& function,
+                   const GrowableArray<BlockEntryInstr*>& block_order)
+      : FlowGraphVisitor(block_order), function_(function) { }
+
+  virtual ~FlowGraphPrinter() {}
+
+  // Print the instructions in a block terminated by newlines.  Add "goto N"
+  // to the end of the block if it ends with an unconditional jump to
+  // another block and that block is not next in reverse postorder.
+  void VisitBlocks();
+
+  // Visiting a computation prints it with no indentation or newline.
+#define DECLARE_VISIT_COMPUTATION(ShortName, ClassName)                        \
+  virtual void Visit##ShortName(ClassName* comp);
+
+  // Visiting an instruction prints it with a four space indent and no
+  // trailing newline.  Basic block entries are labeled with their block
+  // number.
+#define DECLARE_VISIT_INSTRUCTION(ShortName)                                   \
+  virtual void Visit##ShortName(ShortName##Instr* instr);
+
+  FOR_EACH_COMPUTATION(DECLARE_VISIT_COMPUTATION)
+  FOR_EACH_INSTRUCTION(DECLARE_VISIT_INSTRUCTION)
+
+#undef DECLARE_VISIT_COMPUTATION
+#undef DECLARE_VISIT_INSTRUCTION
+
+ private:
+  const Function& function_;
+
+  DISALLOW_COPY_AND_ASSIGN(FlowGraphPrinter);
+};
+
+}  // namespace dart
+
+#endif  // VM_IL_PRINTER_H_