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annotate src/mono_shake.sml @ 1289:3b22c3c67f35

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Reduce: Inline let-bound variables whose types involve functions
author Adam Chlipala <adam@chlipala.net>
date Sun, 22 Aug 2010 13:43:46 -0400
parents a9a500d22ebc
children b4480a56cab7
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@1265 61 | ((DView (_, _, e), _), st) => usedVars st e
adamc@1199 62 | ((DPolicy pol, _), st) =>
adamc@1199 63 let
adamc@1199 64 val e1 = case pol of
adamc@1214 65 PolClient e1 => e1
adamc@1220 66 | PolInsert e1 => e1
adamc@1221 67 | PolDelete e1 => e1
adamc@1223 68 | PolUpdate e1 => e1
adamc@1229 69 | PolSequence e1 => e1
adamc@1199 70 in
adamc@1199 71 usedVars st e1
adamc@1199 72 end
adamc@1073 73 | (_, st) => st) (IS.empty, IS.empty) file
adamc@134 74
adamc@808 75 val (cdef, edef) = foldl (fn ((DDatatype dts, _), (cdef, edef)) =>
adamc@808 76 (foldl (fn ((_, n, xncs), cdef) => IM.insert (cdef, n, xncs)) cdef dts, edef)
adamc@178 77 | ((DVal (_, n, t, e, _), _), (cdef, edef)) =>
adamc@178 78 (cdef, IM.insert (edef, n, (t, e)))
adamc@134 79 | ((DValRec vis, _), (cdef, edef)) =>
adamc@134 80 (cdef, foldl (fn ((_, n, t, e, _), edef) => IM.insert (edef, n, (t, e))) edef vis)
adamc@271 81 | ((DExport _, _), acc) => acc
adamc@273 82 | ((DTable _, _), acc) => acc
adamc@338 83 | ((DSequence _, _), acc) => acc
adamc@754 84 | ((DView _, _), acc) => acc
adamc@569 85 | ((DDatabase _, _), acc) => acc
adamc@718 86 | ((DJavaScript _, _), acc) => acc
adamc@725 87 | ((DCookie _, _), acc) => acc
adamc@1073 88 | ((DStyle _, _), acc) => acc
adamc@1199 89 | ((DTask _, _), acc) => acc
adamc@1199 90 | ((DPolicy _, _), acc) => acc)
adamc@134 91 (IM.empty, IM.empty) file
adamc@134 92
adamc@164 93 fun typ (c, s) =
adamc@164 94 case c of
adamc@196 95 TDatatype (n, _) =>
adamc@164 96 if IS.member (#con s, n) then
adamc@164 97 s
adamc@164 98 else
adamc@178 99 let
adamc@178 100 val s' = {exp = #exp s,
adamc@178 101 con = IS.add (#con s, n)}
adamc@178 102 in
adamc@178 103 case IM.find (cdef, n) of
adamc@178 104 NONE => s'
adamc@178 105 | SOME xncs => foldl (fn ((_, _, to), s) =>
adamc@178 106 case to of
adamc@178 107 NONE => s
adamc@178 108 | SOME t => shakeTyp s t)
adamc@178 109 s' xncs
adamc@178 110 end
adamc@164 111 | _ => s
adamc@134 112
adamc@178 113 and shakeTyp s = U.Typ.fold typ s
adamc@178 114
adamc@134 115 fun exp (e, s) =
adamc@134 116 case e of
adamc@134 117 ENamed n =>
adamc@134 118 if IS.member (#exp s, n) then
adamc@134 119 s
adamc@134 120 else
adamc@134 121 let
adamc@134 122 val s' = {exp = IS.add (#exp s, n),
adamc@134 123 con = #con s}
adamc@134 124 in
adamc@134 125 case IM.find (edef, n) of
adamc@134 126 NONE => s'
adamc@134 127 | SOME (t, e) => shakeExp s' e
adamc@134 128 end
adamc@134 129 | _ => s
adamc@134 130
adamc@134 131 and shakeExp s = U.Exp.fold {typ = typ, exp = exp} s
adamc@134 132
adamc@1073 133 val s = {con = page_cs, exp = page_es}
adamc@134 134
adamc@1073 135 val s = IS.foldl (fn (n, s) =>
adamc@1073 136 case IM.find (cdef, n) of
adamc@1073 137 NONE => raise Fail "MonoShake: Couldn't find 'datatype'"
adamc@1073 138 | SOME xncs => foldl (fn ((_, _, SOME c), s) => shakeTyp s c
adamc@1073 139 | _ => s) s xncs) s page_cs
adamc@1073 140
adamc@1073 141 val s = IS.foldl (fn (n, s) =>
adamc@1073 142 case IM.find (edef, n) of
adamc@1073 143 NONE => raise Fail "MonoShake: Couldn't find 'val'"
adamc@1073 144 | SOME (t, e) => shakeExp s e) s page_es
adamc@134 145 in
adamc@808 146 List.filter (fn (DDatatype dts, _) => List.exists (fn (_, n, _) => IS.member (#con s, n)) dts
adamc@164 147 | (DVal (_, n, _, _, _), _) => IS.member (#exp s, n)
adamc@134 148 | (DValRec vis, _) => List.exists (fn (_, n, _, _, _) => IS.member (#exp s, n)) vis
adamc@271 149 | (DExport _, _) => true
adamc@273 150 | (DTable _, _) => true
adamc@338 151 | (DSequence _, _) => true
adamc@754 152 | (DView _, _) => true
adamc@569 153 | (DDatabase _, _) => true
adamc@718 154 | (DJavaScript _, _) => true
adamc@725 155 | (DCookie _, _) => true
adamc@1073 156 | (DStyle _, _) => true
adamc@1199 157 | (DTask _, _) => true
adamc@1199 158 | (DPolicy _, _) => true) file
adamc@134 159 end
adamc@134 160
adamc@134 161 end