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+(* *********************************************************************)
+(* *)
+(* The Compcert verified compiler *)
+(* *)
+(* Xavier Leroy, INRIA Paris-Rocquencourt *)
+(* *)
+(* Copyright Institut National de Recherche en Informatique et en *)
+(* Automatique. All rights reserved. This file is distributed *)
+(* under the terms of the INRIA Non-Commercial License Agreement. *)
+(* *)
+(* *********************************************************************)
+
+open Registers
+open Locations
+open RTL
+open RTLtyping
+open InterfGraph
+
+val graph_coloring:
+ coq_function -> graph -> regenv -> Regset.t -> (reg -> loc)