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annotate src/mono_shake.sml @ 1207:ae3036773768

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Introduced the known() predicate
author Adam Chlipala <adamc@hcoop.net>
date Tue, 06 Apr 2010 09:51:36 -0400
parents c316ca3c9ec6
children 648e6b087dfb
rev   line source
adamc@134 1 (* Copyright (c) 2008, Adam Chlipala
adamc@134 2 * All rights reserved.
adamc@134 3 *
adamc@134 4 * Redistribution and use in source and binary forms, with or without
adamc@134 5 * modification, are permitted provided that the following conditions are met:
adamc@134 6 *
adamc@134 7 * - Redistributions of source code must retain the above copyright notice,
adamc@134 8 * this list of conditions and the following disclaimer.
adamc@134 9 * - Redistributions in binary form must reproduce the above copyright notice,
adamc@134 10 * this list of conditions and the following disclaimer in the documentation
adamc@134 11 * and/or other materials provided with the distribution.
adamc@134 12 * - The names of contributors may not be used to endorse or promote products
adamc@134 13 * derived from this software without specific prior written permission.
adamc@134 14 *
adamc@134 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
adamc@134 16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
adamc@134 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
adamc@134 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
adamc@134 19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
adamc@134 20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
adamc@134 21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
adamc@134 22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
adamc@134 23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
adamc@134 24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
adamc@134 25 * POSSIBILITY OF SUCH DAMAGE.
adamc@134 26 *)
adamc@134 27
adamc@134 28 (* Remove unused definitions from a file *)
adamc@134 29
adamc@134 30 structure MonoShake :> MONO_SHAKE = struct
adamc@134 31
adamc@134 32 open Mono
adamc@134 33
adamc@134 34 structure U = MonoUtil
adamc@134 35
adamc@134 36 structure IS = IntBinarySet
adamc@134 37 structure IM = IntBinaryMap
adamc@134 38
adamc@134 39 type free = {
adamc@134 40 con : IS.set,
adamc@134 41 exp : IS.set
adamc@134 42 }
adamc@134 43
adamc@134 44 fun shake file =
adamc@134 45 let
adamc@1073 46 val usedVars = U.Exp.fold {typ = fn (c, st as (cs, es)) =>
adamc@1073 47 case c of
adamc@1073 48 TDatatype (n, _) => (IS.add (cs, n), es)
adamc@1073 49 | _ => st,
adamc@1073 50 exp = fn (e, st as (cs, es)) =>
adamc@1073 51 case e of
adamc@1073 52 ENamed n => (cs, IS.add (es, n))
adamc@1073 53 | _ => st}
adamc@1073 54
adamc@1073 55 val (page_cs, page_es) =
adamc@1073 56 List.foldl
adamc@1104 57 (fn ((DExport (_, _, n, _, _, _), _), (page_cs, page_es)) => (page_cs, IS.add (page_es, n))
adamc@1073 58 | ((DDatabase {expunge = n1, initialize = n2, ...}, _), (page_cs, page_es)) =>
adamc@1073 59 (page_cs, IS.addList (page_es, [n1, n2]))
adamc@1075 60 | ((DTask (e1, e2), _), st) => usedVars (usedVars st e2) e1
adamc@1199 61 | ((DPolicy pol, _), st) =>
adamc@1199 62 let
adamc@1199 63 val e1 = case pol of
adamc@1199 64 PolQuery e1 => e1
adamc@1199 65 in
adamc@1199 66 usedVars st e1
adamc@1199 67 end
adamc@1073 68 | (_, st) => st) (IS.empty, IS.empty) file
adamc@134 69
adamc@808 70 val (cdef, edef) = foldl (fn ((DDatatype dts, _), (cdef, edef)) =>
adamc@808 71 (foldl (fn ((_, n, xncs), cdef) => IM.insert (cdef, n, xncs)) cdef dts, edef)
adamc@178 72 | ((DVal (_, n, t, e, _), _), (cdef, edef)) =>
adamc@178 73 (cdef, IM.insert (edef, n, (t, e)))
adamc@134 74 | ((DValRec vis, _), (cdef, edef)) =>
adamc@134 75 (cdef, foldl (fn ((_, n, t, e, _), edef) => IM.insert (edef, n, (t, e))) edef vis)
adamc@271 76 | ((DExport _, _), acc) => acc
adamc@273 77 | ((DTable _, _), acc) => acc
adamc@338 78 | ((DSequence _, _), acc) => acc
adamc@754 79 | ((DView _, _), acc) => acc
adamc@569 80 | ((DDatabase _, _), acc) => acc
adamc@718 81 | ((DJavaScript _, _), acc) => acc
adamc@725 82 | ((DCookie _, _), acc) => acc
adamc@1073 83 | ((DStyle _, _), acc) => acc
adamc@1199 84 | ((DTask _, _), acc) => acc
adamc@1199 85 | ((DPolicy _, _), acc) => acc)
adamc@134 86 (IM.empty, IM.empty) file
adamc@134 87
adamc@164 88 fun typ (c, s) =
adamc@164 89 case c of
adamc@196 90 TDatatype (n, _) =>
adamc@164 91 if IS.member (#con s, n) then
adamc@164 92 s
adamc@164 93 else
adamc@178 94 let
adamc@178 95 val s' = {exp = #exp s,
adamc@178 96 con = IS.add (#con s, n)}
adamc@178 97 in
adamc@178 98 case IM.find (cdef, n) of
adamc@178 99 NONE => s'
adamc@178 100 | SOME xncs => foldl (fn ((_, _, to), s) =>
adamc@178 101 case to of
adamc@178 102 NONE => s
adamc@178 103 | SOME t => shakeTyp s t)
adamc@178 104 s' xncs
adamc@178 105 end
adamc@164 106 | _ => s
adamc@134 107
adamc@178 108 and shakeTyp s = U.Typ.fold typ s
adamc@178 109
adamc@134 110 fun exp (e, s) =
adamc@134 111 case e of
adamc@134 112 ENamed n =>
adamc@134 113 if IS.member (#exp s, n) then
adamc@134 114 s
adamc@134 115 else
adamc@134 116 let
adamc@134 117 val s' = {exp = IS.add (#exp s, n),
adamc@134 118 con = #con s}
adamc@134 119 in
adamc@134 120 case IM.find (edef, n) of
adamc@134 121 NONE => s'
adamc@134 122 | SOME (t, e) => shakeExp s' e
adamc@134 123 end
adamc@134 124 | _ => s
adamc@134 125
adamc@134 126 and shakeExp s = U.Exp.fold {typ = typ, exp = exp} s
adamc@134 127
adamc@1073 128 val s = {con = page_cs, exp = page_es}
adamc@134 129
adamc@1073 130 val s = IS.foldl (fn (n, s) =>
adamc@1073 131 case IM.find (cdef, n) of
adamc@1073 132 NONE => raise Fail "MonoShake: Couldn't find 'datatype'"
adamc@1073 133 | SOME xncs => foldl (fn ((_, _, SOME c), s) => shakeTyp s c
adamc@1073 134 | _ => s) s xncs) s page_cs
adamc@1073 135
adamc@1073 136 val s = IS.foldl (fn (n, s) =>
adamc@1073 137 case IM.find (edef, n) of
adamc@1073 138 NONE => raise Fail "MonoShake: Couldn't find 'val'"
adamc@1073 139 | SOME (t, e) => shakeExp s e) s page_es
adamc@134 140 in
adamc@808 141 List.filter (fn (DDatatype dts, _) => List.exists (fn (_, n, _) => IS.member (#con s, n)) dts
adamc@164 142 | (DVal (_, n, _, _, _), _) => IS.member (#exp s, n)
adamc@134 143 | (DValRec vis, _) => List.exists (fn (_, n, _, _, _) => IS.member (#exp s, n)) vis
adamc@271 144 | (DExport _, _) => true
adamc@273 145 | (DTable _, _) => true
adamc@338 146 | (DSequence _, _) => true
adamc@754 147 | (DView _, _) => true
adamc@569 148 | (DDatabase _, _) => true
adamc@718 149 | (DJavaScript _, _) => true
adamc@725 150 | (DCookie _, _) => true
adamc@1073 151 | (DStyle _, _) => true
adamc@1199 152 | (DTask _, _) => true
adamc@1199 153 | (DPolicy _, _) => true) file
adamc@134 154 end
adamc@134 155
adamc@134 156 end