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annotate gcc/testsuite/gcc.dg/strlenopt-15.c @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
parents
children 1830386684a0
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
111
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1 /* { dg-do run } */
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2 /* { dg-options "-O2 -fdump-tree-strlen" } */
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3
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4 #include "strlenopt.h"
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5
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6 __attribute__((noinline, noclone)) size_t
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7 fn1 (char *p, size_t l)
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8 {
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9 memcpy (p, "abcdef", l);
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10 /* This strlen can't be optimized, as l is unknown. */
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11 return strlen (p);
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12 }
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13
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14 __attribute__((noinline, noclone)) size_t
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15 fn2 (char *p, const char *q, size_t *lp)
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16 {
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17 size_t l = strlen (q), l2;
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18 memcpy (p, q, 7);
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19 /* This strlen can't be optimized, as l might be bigger than 7. */
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20 l2 = strlen (p);
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21 *lp = l;
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22 return l2;
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23 }
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24
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25 __attribute__((noinline, noclone)) char *
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26 fn3 (char *p)
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27 {
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28 *p = 0;
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29 return p + 1;
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30 }
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31
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32 int
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33 main ()
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34 {
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35 char buf[64];
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36 const char *volatile q = "ABCDEFGH";
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37 const char *volatile q2 = "IJ\0KLMNOPQRS";
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38 size_t l;
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39 memset (buf, '\0', sizeof buf);
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40 memset (buf + 2, 'a', 7);
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41 if (fn1 (buf, 3) != 9 || memcmp (buf, "abcaaaaaa", 10) != 0)
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42 abort ();
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43 if (fn1 (buf, 7) != 6 || memcmp (buf, "abcdef\0aa", 10) != 0)
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44 abort ();
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45 if (fn2 (buf, q, &l) != 9 || l != 8 || memcmp (buf, "ABCDEFGaa", 10) != 0)
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46 abort ();
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47 if (fn2 (buf, q2, &l) != 2 || l != 2 || memcmp (buf, "IJ\0KLMNaa", 10) != 0)
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48 abort ();
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49 if (fn3 (buf) != buf + 1 || memcmp (buf, "\0J\0KLMNaa", 10) != 0)
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50 abort ();
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51 return 0;
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52 }
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53
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54 /* { dg-final { scan-tree-dump-times "strlen \\(" 3 "strlen" } } */
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55 /* { dg-final { scan-tree-dump-times "memcpy \\(" 2 "strlen" } } */
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56 /* { dg-final { scan-tree-dump-times "strcpy \\(" 0 "strlen" } } */
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57 /* { dg-final { scan-tree-dump-times "strcat \\(" 0 "strlen" } } */
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58 /* { dg-final { scan-tree-dump-times "strchr \\(" 0 "strlen" } } */
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59 /* { dg-final { scan-tree-dump-times "stpcpy \\(" 0 "strlen" } } */