56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
/* { dg-do run } */
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/* { dg-options "-O2 -fdump-tree-strlen" } */
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#include "strlenopt.h"
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__attribute__((noinline, noclone)) char *
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foo (char *p, const char *q)
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{
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char *e = strchr (p, '\0');
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strcat (p, q);
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return e;
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}
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__attribute__((noinline, noclone)) char *
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bar (char *p)
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{
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memcpy (p, "abcd", 5);
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return strchr (p, '\0');
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}
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__attribute__((noinline, noclone)) void
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baz (char *p)
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{
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char *e = strchr (p, '\0');
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strcat (e, "abcd");
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}
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char buf[64];
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int
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main ()
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{
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char *volatile p = buf;
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const char *volatile q = "ij";
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memset (buf, 'v', 3);
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if (foo (p, q) != buf + 3
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|| memcmp (buf, "vvvij\0\0\0\0", 10) != 0)
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abort ();
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memset (buf, '\0', sizeof buf);
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if (bar (p) != buf + 4
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|| memcmp (buf, "abcd\0\0\0\0\0", 10) != 0)
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abort ();
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memset (buf, 'v', 2);
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memset (buf + 2, '\0', -2 + sizeof buf);
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baz (p);
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if (memcmp (buf, "vvabcd\0\0\0", 10) != 0)
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abort ();
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return 0;
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}
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/* { dg-final { scan-tree-dump-times "strlen \\(" 2 "strlen1" } } */
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/* { dg-final { scan-tree-dump-times "memcpy \\(" 2 "strlen1" } } */
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/* { dg-final { scan-tree-dump-times "strcpy \\(" 1 "strlen1" } } */
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/* { dg-final { scan-tree-dump-times "strcat \\(" 0 "strlen1" } } */
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/* { dg-final { scan-tree-dump-times "strchr \\(" 0 "strlen1" } } */
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/* { dg-final { scan-tree-dump-times "stpcpy \\(" 0 "strlen1" } } */
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