45 lines
1.2 KiB
C
45 lines
1.2 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, char *r)
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{
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char *q = malloc (strlen (p) + strlen (r) + 64);
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if (q == NULL) return NULL;
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/* This strcpy can be optimized into memcpy, using the remembered
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strlen (p). */
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strcpy (q, p);
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/* These two strcat can be optimized into memcpy. The first one
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could be even optimized into a *ptr = '/'; store as the '\0'
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is immediately overwritten. */
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strcat (q, "/");
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strcat (q, "abcde");
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/* This can also be optimized into memcpy. */
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strcat (q, r);
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return q;
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}
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int
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main ()
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{
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char *volatile p = "string1";
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char *volatile r = "string2";
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char *q = foo (p, r);
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if (q != NULL)
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{
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if (strcmp (q, "string1/abcdestring2"))
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abort ();
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free (q);
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}
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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 \\(" 4 "strlen1" } } */
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/* { dg-final { scan-tree-dump-times "strcpy \\(" 0 "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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