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annotate gcc/testsuite/gcc.dg/pr83047.c @ 158:494b0b89df80 default tip

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author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Mon, 25 May 2020 18:13:55 +0900
parents 84e7813d76e9
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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131
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1 /* PR tree-optimization/83047 */
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2 /* { dg-do run { target mmap } } */
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3 /* { dg-options "-O2" } */
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4
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5 #include <stddef.h>
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6 #include <stdio.h>
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7 #include <sys/mman.h>
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8 #ifndef MAP_ANONYMOUS
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9 #define MAP_ANONYMOUS MAP_ANON
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10 #endif
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11 #ifndef MAP_ANON
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12 #define MAP_ANON 0
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13 #endif
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14 #ifndef MAP_FAILED
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15 #define MAP_FAILED ((void *)-1)
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16 #endif
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17 #include <stdlib.h>
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18
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19 __attribute__((noipa)) void
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20 foo (char *p, char *q, int r)
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21 {
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22 char a = q[0];
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23 if (r || a == '\0')
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24 return;
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25 char b = q[1];
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26 p[0] = a;
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27 p[1] = b;
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28 }
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29
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30 int
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31 main ()
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32 {
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33 char *p = mmap (NULL, 131072, PROT_READ | PROT_WRITE,
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34 MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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35 if (p == MAP_FAILED)
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36 return 0;
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37 if (munmap (p + 65536, 65536) < 0)
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38 return 0;
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39 p[0] = 'c';
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40 p[1] = 'd';
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41 p[65536 - 2] = 'a';
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42 p[65536 - 1] = 'b';
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43 volatile int r = 1;
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44 foo (p, p + 65536 - 2, r);
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45 if (p[0] != 'c' || p[1] != 'd')
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46 abort ();
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47 r = 0;
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48 foo (p, p + 65536 - 2, r);
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49 if (p[0] != 'a' || p[1] != 'b')
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50 abort ();
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51 p[0] = 'e';
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52 p[1] = 'f';
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53 r = 1;
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54 foo (p, p + 65536 - 1, r);
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55 if (p[0] != 'e' || p[1] != 'f')
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56 abort ();
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57 return 0;
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58 }