libbanshee/engine/setif-var.c

   1 /*
   2  * Copyright (c) 2000-2001
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  */
  30
  31 #include <stdio.h>
  32 #include <assert.h>
  33 #include <regions.h>
  34 #include "setif-var.h"
  35 #include "ufind.h"
  36 #include "bounds.h"
  37
  38 struct sv_info
  39 {
  40   stamp st;
  41   bounds sameregion lbs;
  42   bounds sameregion ubs;
  43   jcoll tlb_cache;
  44   gen_e_list ub_projs;
  45   const char *name;
  46   uf_element component;
  47 };
  48
  49 typedef struct sv_info *sv_info;
  50
  51 DECLARE_UFIND(sv_elt,sv_info)
  52
  53 DEFINE_UFIND(sv_elt,sv_info)
  54
  55 DEFINE_LIST(setif_var_list,setif_var)
  56
  57 #define get_info(v) (sv_elt_get_info((v)->elt))
  58
  59 struct setif_var /* extends gen_e */
  60 {
  61 #ifdef NONSPEC
  62   sort_kind sort;
  63 #endif
  64   int type;
  65   sv_elt elt;
  66 };
  67
  68 bool sv_lt(setif_var v1, setif_var v2)
  69 {
  70   return ( sv_get_stamp(v1) < sv_get_stamp(v2) );
  71 }
  72
  73 bool sv_eq(setif_var v1, setif_var v2)
  74 {
  75   return ( sv_get_stamp(v1) == sv_get_stamp(v2) );
  76 }
  77
  78 static setif_var make_var(region r, const char *name, stamp st)
  79 {
  80   setif_var result = ralloc(r, struct setif_var);
  81   sv_info info = ralloc(r, struct sv_info);
  82
  83   info->st = st;
  84   info->lbs = bounds_create(r);
  85   info->ubs = bounds_create(r);
  86   info->tlb_cache = NULL;
  87   info->ub_projs = new_gen_e_list(r);
  88   info->name = name ? rstrdup(r,name) : "fv";
  89   info->component = new_uf_element(r, NULL);
  90
  91   result->type = VAR_TYPE;
  92   result->elt = new_sv_elt(r,info);
  93
  94 #ifdef NONSPEC
  95   result->sort = setif_sort;
  96 #endif
  97
  98   return result;
  99 }
 100
 101 setif_var sv_fresh(region r, const char *name)
 102 {
 103   return make_var(r,name,stamp_fresh());
 104 }
 105
 106 setif_var sv_fresh_large(region r, const char *name)
 107 {
 108   return make_var(r,name,stamp_fresh_large());
 109 }
 110
 111 setif_var sv_fresh_small(region r, const char *name)
 112 {
 113   return make_var(r,name,stamp_fresh_small());
 114 }
 115
 116 stamp sv_get_stamp(setif_var v)
 117 {
 118   return get_info(v)->st;
 119 }
 120
 121 const char *sv_get_name(setif_var v)
 122 {
 123   return get_info(v)->name;
 124 }
 125
 126
 127 static sv_info combine(sv_info i1, sv_info i2)
 128 {
 129   if (i1->st < i2->st)
 130     return i1;
 131   else return i2;
 132 }
 133
 134 void sv_unify(setif_var v,setif_var_list vars)
 135 {
 136   setif_var temp;
 137   setif_var_list_scanner scan;
 138
 139   setif_var_list_scan(vars,&scan);
 140
 141   while (setif_var_list_next(&scan,&temp))
 142     {
 143       sv_elt_unify(combine,v->elt,temp->elt);
 144     }
 145 }
 146
 147 gen_e_list sv_get_lbs(setif_var v)
 148 {
 149   return bounds_exprs(get_info(v)->lbs);
 150 }
 151
 152 gen_e_list sv_get_ubs(setif_var v)
 153 {
 154   return bounds_exprs(get_info(v)->ubs);
 155 }
 156
 157 bool sv_add_ub(setif_var v, gen_e e, stamp s)
 158 {
 159   return bounds_add(get_info(v)->ubs,e,s);
 160 }
 161
 162 bool sv_add_lb(setif_var v, gen_e e, stamp s)
 163 {
 164   return bounds_add(get_info(v)->lbs,e,s);
 165 }
 166
 167 bool sv_is_ub(setif_var v, stamp s)
 168 {
 169   bool self_edge = sv_get_stamp(v) == s,
 170     in_bounds = bounds_query(get_info(v)->ubs,s);
 171
 172   return (self_edge || in_bounds);
 173 }
 174
 175 bool sv_is_lb(setif_var v, stamp s)
 176 {
 177
 178   bool self_edge = sv_get_stamp(v) == s,
 179     in_bounds = bounds_query(get_info(v)->lbs,s);
 180
 181   return (self_edge || in_bounds);
 182
 183 }
 184
 185 void sv_add_ub_proj(setif_var v, gen_e e)
 186 {
 187   gen_e_list_cons(e,get_info(v)->ub_projs);
 188 }
 189
 190 gen_e sv_get_ub_proj(setif_var v, get_proj_fn_ptr get_proj)
 191 {
 192   return get_proj(get_info(v)->ub_projs);
 193 }
 194
 195 gen_e_list sv_get_ub_projs(setif_var v)
 196 {
 197   return get_info(v)->ub_projs;
 198 }
 199
 200
 201 bool sv_union_component(setif_var v1, setif_var v2)
 202 {
 203   if (uf_eq(get_info(v1)->component,get_info(v2)->component))
 204     return FALSE;
 205
 206   else
 207     {
 208       uf_union(get_info(v1)->component,get_info(v2)->component);
 209       return TRUE;
 210     }
 211 }
 212
 213 void sv_set_tlb_cache(setif_var v, jcoll j)
 214 {
 215   get_info(v)->tlb_cache = j;
 216 }
 217
 218 jcoll sv_get_tlb_cache(setif_var v)
 219 {
 220   return get_info(v)->tlb_cache;
 221 }
 222
 223 void sv_clear_tlb_cache(setif_var v)
 224 {
 225   get_info(v)->tlb_cache = NULL;
 226 }