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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. *)
(* *)
(* *********************************************************************)
Require Import Coqlib Errors AST Integers.
Require Import Asmblock.
Local Open Scope error_monad_scope.
(** Oracle taking as input a basic block,
returns a schedule expressed as a list of bundles *)
Axiom schedule: bblock -> list bblock.
Extract Constant schedule => "PostpassSchedulingOracle.schedule".
(* TODO: refactorisation.
... concat2 ...
Fixpoint concat_all (lbb: list bblock) : res bblock :=
match lbb with
| nil => Error (msg "PostpassSchedulingproof.concatenate: empty list")
| bb::nil => OK bb
| bb::lbb =>
do bb' <- concat_all lbb;
concat2 bb bb'
end.
Axiom test_equiv_bblock: bblock -> bblock -> bool.
Axiom test_equiv_bblock_correct:
forall ge f bb tbb,
test_equiv bb tbb = true ->
bblock_equiv ge f bb tbb.
Definition verified_schedule (bb : bblock) : res (list bblock) :=
DO lbb <- (schedule bb) ;
DO tbb <- (concat lbb) ;
DO res <- test_equiv_bblock bb tbb ;
if res
then OK lbb
else Error (msg "blah").
*)
(* TODO - implement the verificator *)
Definition verified_schedule (bb : bblock) : res (list bblock) := OK (schedule bb).
Fixpoint transf_blocks (lbb : list bblock) : res (list bblock) :=
match lbb with
| nil => OK nil
| (cons bb lbb) =>
do tlbb <- transf_blocks lbb;
do tbb <- verified_schedule bb;
OK (tbb ++ tlbb)
end.
Definition transl_function (f: function) : res function :=
do lb <- transf_blocks (fn_blocks f);
OK (mkfunction (fn_sig f) lb).
Definition transf_function (f: function) : res function :=
do tf <- transl_function f;
if zlt Ptrofs.max_unsigned (size_blocks tf.(fn_blocks))
then Error (msg "code size exceeded")
else OK tf.
Definition transf_fundef (f: fundef) : res fundef :=
transf_partial_fundef transf_function f.
Definition transf_program (p: program) : res program :=
transform_partial_program transf_fundef p.
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