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(* Copyright (c) 2009, Adam Chlipala
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* - The names of contributors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*)
structure Checknest :> CHECKNEST = struct
open Cjr
structure IS = IntBinarySet
structure IM = IntBinaryMap
fun expUses globals =
let
fun eu (e, _) =
case e of
EPrim _ => IS.empty
| ERel _ => IS.empty
| ENamed n => Option.getOpt (IM.find (globals, n), IS.empty)
| ECon (_, _, NONE) => IS.empty
| ECon (_, _, SOME e) => eu e
| ENone _ => IS.empty
| ESome (_, e) => eu e
| EFfi _ => IS.empty
| EFfiApp (_, _, es) => foldl IS.union IS.empty (map eu es)
| EApp (e, es) => foldl IS.union (eu e) (map eu es)
| EUnop (_, e) => eu e
| EBinop (_, e1, e2) => IS.union (eu e1, eu e2)
| ERecord (_, xes) => foldl (fn ((_, e), s) => IS.union (eu e, s)) IS.empty xes
| EField (e, _) => eu e
| ECase (e, pes, _) => foldl (fn ((_, e), s) => IS.union (eu e, s)) (eu e) pes
| EError (e, _) => eu e
| EReturnBlob {blob, mimeType, ...} => IS.union (eu blob, eu mimeType)
| ERedirect (e, _) => eu e
| EWrite e => eu e
| ESeq (e1, e2) => IS.union (eu e1, eu e2)
| ELet (_, _, e1, e2) => IS.union (eu e1, eu e2)
| EQuery {query, body, initial, prepared, ...} =>
let
val s = IS.union (eu query, IS.union (eu body, eu initial))
in
case prepared of
SOME {id, ...} => IS.add (s, id)
| _ => s
end
| EDml {dml, prepared, ...} =>
let
val s = eu dml
in
case prepared of
SOME {id, ...} => IS.add (s, id)
| _ => s
end
| ENextval {seq, prepared, ...} =>
let
val s = eu seq
in
case prepared of
SOME {id, ...} => IS.add (s, id)
| _ => s
end
| EUnurlify (e, _) => eu e
in
eu
end
fun annotateExp globals =
let
fun ae (e as (_, loc)) =
case #1 e of
EPrim _ => e
| ERel _ => e
| ENamed n => e
| ECon (_, _, NONE) => e
| ECon (dk, pc, SOME e) => (ECon (dk, pc, SOME (ae e)), loc)
| ENone _ => e
| ESome (t, e) => (ESome (t, ae e), loc)
| EFfi _ => e
| EFfiApp (m, f, es) => (EFfiApp (m, f, map ae es), loc)
| EApp (e, es) => (EApp (ae e, map ae es), loc)
| EUnop (uo, e) => (EUnop (uo, ae e), loc)
| EBinop (bo, e1, e2) => (EBinop (bo, ae e1, ae e2), loc)
| ERecord (n, xes) => (ERecord (n, map (fn (x, e) => (x, ae e)) xes), loc)
| EField (e, f) => (EField (ae e, f), loc)
| ECase (e, pes, ts) => (ECase (ae e, map (fn (p, e) => (p, ae e)) pes, ts), loc)
| EError (e, t) => (EError (ae e, t), loc)
| EReturnBlob {blob, mimeType, t} => (EReturnBlob {blob = ae blob, mimeType = ae mimeType, t = t}, loc)
| ERedirect (e, t) => (ERedirect (ae e, t), loc)
| EWrite e => (EWrite (ae e), loc)
| ESeq (e1, e2) => (ESeq (ae e1, ae e2), loc)
| ELet (x, t, e1, e2) => (ELet (x, t, ae e1, ae e2), loc)
| EQuery {exps, tables, rnum, state, query, body, initial, prepared} =>
(EQuery {exps = exps,
tables = tables,
rnum = rnum,
state = state,
query = ae query,
body = ae body,
initial = ae initial,
prepared = case prepared of
NONE => NONE
| SOME {id, query, ...} => SOME {id = id, query = query,
nested = IS.member (expUses globals body, id)}},
loc)
| EDml {dml, prepared} =>
(EDml {dml = ae dml,
prepared = prepared}, loc)
| ENextval {seq, prepared} =>
(ENextval {seq = ae seq,
prepared = prepared}, loc)
| EUnurlify (e, t) => (EUnurlify (ae e, t), loc)
in
ae
end
fun annotate (ds, syms) =
let
val globals =
foldl (fn ((d, _), globals) =>
case d of
DVal (_, n, _, e) => IM.insert (globals, n, expUses globals e)
| DFun (_, n, _, _, e) => IM.insert (globals, n, expUses globals e)
| DFunRec fs =>
let
val s = foldl (fn ((_, _, _, _, e), s) => IS.union (expUses globals e, s)) IS.empty fs
in
foldl (fn ((_, n, _, _, _), globals) => IM.insert (globals, n, s)) globals fs
end
| _ => globals) IM.empty ds
val ds =
map (fn d as (_, loc) =>
case #1 d of
DVal (x, n, t, e) => (DVal (x, n, t, annotateExp globals e), loc)
| DFun (x, n, ts, t, e) => (DFun (x, n, ts, t, annotateExp globals e), loc)
| DFunRec fs => (DFunRec
(map (fn (x, n, ts, t, e) => (x, n, ts, t, annotateExp globals e)) fs), loc)
| _ => d) ds
in
(ds, syms)
end
end
|
