Coverage Report

Created: 2018-02-20 12:54

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/polly/lib/External/isl/isl_hash.c
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Source (jump to first uncovered line)
1
/*
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 * Copyright 2008-2009 Katholieke Universiteit Leuven
3
 *
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 * Use of this software is governed by the MIT license
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 *
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 * Written by Sven Verdoolaege, K.U.Leuven, Departement
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 * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
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 */
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10
#include <stdlib.h>
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#include <isl_hash_private.h>
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#include <isl/ctx.h>
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#include "isl_config.h"
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15
uint32_t isl_hash_string(uint32_t hash, const char *s)
16
152k
{
17
1.49M
  for (; *s; 
s++1.33M
)
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1.33M
    isl_hash_byte(hash, *s);
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152k
  return hash;
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152k
}
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uint32_t isl_hash_mem(uint32_t hash, const void *p, size_t len)
23
15.7k
{
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15.7k
  int i;
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15.7k
  const char *s = p;
26
142k
  for (i = 0; i < len; 
++i126k
)
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126k
    isl_hash_byte(hash, s[i]);
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15.7k
  return hash;
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15.7k
}
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static unsigned int round_up(unsigned int v)
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371k
{
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371k
  int old_v = v;
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371k
35
1.27M
  while (v) {
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900k
    old_v = v;
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900k
    v ^= v & -v;
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900k
  }
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371k
  return old_v << 1;
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371k
}
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int isl_hash_table_init(struct isl_ctx *ctx, struct isl_hash_table *table,
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      int min_size)
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371k
{
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371k
  size_t size;
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371k
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371k
  if (!table)
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0
    return -1;
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371k
50
371k
  if (min_size < 2)
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162k
    min_size = 2;
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371k
  table->bits = ffs(round_up(4 * (min_size + 1) / 3 - 1)) - 1;
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371k
  table->n = 0;
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371k
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371k
  size = 1 << table->bits;
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371k
  table->entries = isl_calloc_array(ctx, struct isl_hash_table_entry,
57
371k
            size);
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371k
  if (!table->entries)
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8
    return -1;
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371k
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371k
  return 0;
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371k
}
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/* Dummy comparison function that always returns false.
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 */
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static int no(const void *entry, const void *val)
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96.1k
{
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96.1k
  return 0;
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96.1k
}
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/* Extend "table" to twice its size.
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 * Return 0 on success and -1 on error.
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 *
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 * We reuse isl_hash_table_find to create entries in the extended table.
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 * Since all entries in the original table are assumed to be different,
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 * there is no need to compare them against each other.
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 */
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static int grow_table(struct isl_ctx *ctx, struct isl_hash_table *table)
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4.79k
{
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4.79k
  int n;
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4.79k
  size_t old_size, size;
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4.79k
  struct isl_hash_table_entry *entries;
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4.79k
  uint32_t h;
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4.79k
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4.79k
  entries = table->entries;
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4.79k
  old_size = 1 << table->bits;
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4.79k
  size = 2 * old_size;
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4.79k
  table->entries = isl_calloc_array(ctx, struct isl_hash_table_entry,
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4.79k
            size);
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4.79k
  if (!table->entries) {
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0
    table->entries = entries;
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0
    return -1;
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0
  }
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4.79k
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4.79k
  n = table->n;
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4.79k
  table->n = 0;
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4.79k
  table->bits++;
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4.79k
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50.1k
  for (h = 0; h < old_size; 
++h45.3k
) {
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45.3k
    struct isl_hash_table_entry *entry;
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45.3k
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45.3k
    if (!entries[h].data)
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11.3k
      continue;
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34.0k
105
34.0k
    entry = isl_hash_table_find(ctx, table, entries[h].hash,
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34.0k
              &no, NULL, 1);
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34.0k
    if (!entry) {
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0
      table->bits--;
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0
      free(table->entries);
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0
      table->entries = entries;
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0
      table->n = n;
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0
      return -1;
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0
    }
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34.0k
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34.0k
    *entry = entries[h];
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34.0k
  }
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4.79k
118
4.79k
  free(entries);
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4.79k
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4.79k
  return 0;
121
4.79k
}
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struct isl_hash_table *isl_hash_table_alloc(struct isl_ctx *ctx, int min_size)
124
26.5k
{
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26.5k
  struct isl_hash_table *table = NULL;
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26.5k
127
26.5k
  table = isl_alloc_type(ctx, struct isl_hash_table);
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26.5k
  if (isl_hash_table_init(ctx, table, min_size))
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0
    goto error;
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26.5k
  return table;
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0
error:
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0
  isl_hash_table_free(ctx, table);
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0
  return NULL;
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26.5k
}
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void isl_hash_table_clear(struct isl_hash_table *table)
137
371k
{
138
371k
  if (!table)
139
0
    return;
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371k
  free(table->entries);
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371k
}
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void isl_hash_table_free(struct isl_ctx *ctx, struct isl_hash_table *table)
144
26.6k
{
145
26.6k
  if (!table)
146
108
    return;
147
26.5k
  isl_hash_table_clear(table);
148
26.5k
  free(table);
149
26.5k
}
150
151
/* A dummy entry that can be used to make a distinction between
152
 * a missing entry and an error condition.
153
 * It is used by isl_union_*_find_part_entry.
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 */
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static struct isl_hash_table_entry none = { 0, NULL };
156
struct isl_hash_table_entry *isl_hash_table_entry_none = &none;
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struct isl_hash_table_entry *isl_hash_table_find(struct isl_ctx *ctx,
159
        struct isl_hash_table *table,
160
        uint32_t key_hash,
161
        int (*eq)(const void *entry, const void *val),
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        const void *val, int reserve)
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1.11M
{
164
1.11M
  size_t size;
165
1.11M
  uint32_t h, key_bits;
166
1.11M
167
1.11M
  key_bits = isl_hash_bits(key_hash, table->bits);
168
1.11M
  size = 1 << table->bits;
169
1.87M
  for (h = key_bits; table->entries[h].data; 
h = (h+1) % size753k
)
170
1.07M
    if (table->entries[h].hash == key_hash &&
171
1.07M
        
eq(table->entries[h].data, val)689k
)
172
321k
      return &table->entries[h];
173
1.11M
174
1.11M
  
if (797k
!reserve797k
)
175
113k
    return NULL;
176
683k
177
683k
  if (4 * table->n >= 3 * size) {
178
4.79k
    if (grow_table(ctx, table) < 0)
179
0
      return NULL;
180
4.79k
    return isl_hash_table_find(ctx, table, key_hash, eq, val, 1);
181
4.79k
  }
182
678k
183
678k
  table->n++;
184
678k
  table->entries[h].hash = key_hash;
185
678k
186
678k
  return &table->entries[h];
187
678k
}
188
189
isl_stat isl_hash_table_foreach(isl_ctx *ctx, struct isl_hash_table *table,
190
  isl_stat (*fn)(void **entry, void *user), void *user)
191
903k
{
192
903k
  size_t size;
193
903k
  uint32_t h;
194
903k
195
903k
  if (!table->entries)
196
8
    return isl_stat_error;
197
903k
198
903k
  size = 1 << table->bits;
199
15.9M
  for (h = 0; h < size; 
++ h15.0M
)
200
15.1M
    if (table->entries[h].data &&
201
15.1M
        
fn(&table->entries[h].data, user) < 01.16M
)
202
94.5k
      return isl_stat_error;
203
903k
  
204
903k
  
return isl_stat_ok808k
;
205
903k
}
206
207
void isl_hash_table_remove(struct isl_ctx *ctx,
208
        struct isl_hash_table *table,
209
        struct isl_hash_table_entry *entry)
210
74.5k
{
211
74.5k
  int h, h2;
212
74.5k
  size_t size;
213
74.5k
214
74.5k
  if (!table || !entry)
215
0
    return;
216
74.5k
217
74.5k
  size = 1 << table->bits;
218
74.5k
  h = entry - table->entries;
219
74.5k
  isl_assert(ctx, h >= 0 && h < size, return);
220
74.5k
221
356k
  
for (h2 = h+1; 74.5k
table->entries[h2 % size].data;
h2++282k
) {
222
282k
    uint32_t bits = isl_hash_bits(table->entries[h2 % size].hash,
223
282k
            table->bits);
224
282k
    uint32_t offset = (size + bits - (h+1)) % size;
225
282k
    if (offset <= h2 - (h+1))
226
59.7k
      continue;
227
222k
    *entry = table->entries[h2 % size];
228
222k
    h = h2;
229
222k
    entry = &table->entries[h % size];
230
222k
  }
231
74.5k
232
74.5k
  entry->hash = 0;
233
74.5k
  entry->data = NULL;
234
74.5k
  table->n--;
235
74.5k
}