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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)
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8 {
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9 char *q;
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10 /* This can be optimized into memcpy and the size can be decreased to one,
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11 as it is immediately overwritten. */
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12 strcpy (p, "z");
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13 q = strchr (p, '\0');
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14 *q = 32;
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15 /* This strlen can't be optimized away, string length is unknown here. */
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16 return strlen (p);
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17 }
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18
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19 __attribute__((noinline, noclone)) void
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20 fn2 (char *p, const char *z, size_t *lp)
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21 {
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22 char *q, *r;
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23 char buf[64];
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24 size_t l[10];
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25 /* The first strlen stays, all the strcpy calls can be optimized
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26 into memcpy and all other strlen calls and all strchr calls
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27 optimized away. */
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28 l[0] = strlen (z);
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29 strcpy (buf, z);
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30 strcpy (p, "abcde");
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31 q = strchr (p, '\0');
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32 strcpy (q, "efghi");
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33 r = strchr (q, '\0');
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34 strcpy (r, "jkl");
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35 l[1] = strlen (p);
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36 l[2] = strlen (q);
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37 l[3] = strlen (r);
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38 strcpy (r, buf);
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39 l[4] = strlen (p);
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40 l[5] = strlen (q);
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41 l[6] = strlen (r);
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42 strcpy (r, "mnopqr");
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43 l[7] = strlen (p);
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44 l[8] = strlen (q);
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45 l[9] = strlen (r);
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46 memcpy (lp, l, sizeof l);
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47 }
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48
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49 int
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50 main ()
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51 {
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52 char buf[64];
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53 size_t l[10];
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54 const char *volatile z = "ABCDEFG";
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55 memset (buf, '\0', sizeof buf);
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56 if (fn1 (buf) != 2 || buf[0] != 'z' || buf[1] != 32 || buf[2] != '\0')
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57 abort ();
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58 fn2 (buf, z, l);
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59 if (memcmp (buf, "abcdeefghimnopqr", 17) != 0)
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60 abort ();
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61 if (l[0] != 7)
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62 abort ();
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63 if (l[1] != 13 || l[2] != 8 || l[3] != 3)
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64 abort ();
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65 if (l[4] != 17 || l[5] != 12 || l[6] != 7)
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66 abort ();
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67 if (l[7] != 16 || l[8] != 11 || l[9] != 6)
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68 abort ();
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69 return 0;
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70 }
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71
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145
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72 /* { dg-final { scan-tree-dump-times "strlen \\(" 2 "strlen1" } } */
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111
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73 /* avr has BIGGEST_ALIGNMENT 8, allowing fold_builtin_memory_op
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74 to expand the memcpy call at the end of fn2. */
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145
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75 /* { dg-final { scan-tree-dump-times "memcpy \\(" 8 "strlen1" { target { ! avr-*-* } } } } */
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76 /* { dg-final { scan-tree-dump-times "memcpy \\(" 7 "strlen1" { target { avr-*-* } } } } */
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77 /* { dg-final { scan-tree-dump-times "strcpy \\(" 0 "strlen1" } } */
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78 /* { dg-final { scan-tree-dump-times "strcat \\(" 0 "strlen1" } } */
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79 /* { dg-final { scan-tree-dump-times "strchr \\(" 0 "strlen1" } } */
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80 /* { dg-final { scan-tree-dump-times "stpcpy \\(" 0 "strlen1" } } */
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81 /* { dg-final { scan-tree-dump-times "\\*q_\[0-9\]* = 32;" 1 "strlen1" } } */
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82 /* { dg-final { scan-tree-dump-times "memcpy \\(\[^\n\r\]*, 1\\)" 1 "strlen1" } } */
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