Viewing file:  strlenopt-8.c (1.01 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-options "-O2 -fdump-tree-strlen" } */
#include "strlenopt.h"
/* Yes, there are people who write code like this. */
__attribute__((noinline, noclone)) char *
foo (int r)
{
char buf[10] = "";
strcat (buf, r ? "r" : "w");
strcat (buf, "b");
return strdup (buf);
}
__attribute__((noinline, noclone)) char *
bar (int r)
{
char buf[10] = {};
strcat (buf, r ? "r" : "w");
strcat (buf, "b");
return strdup (buf);
}
int
main ()
{
char *q = foo (1);
if (q != NULL)
{
if (strcmp (q, "rb"))
abort ();
free (q);
}
q = bar (0);
if (q != NULL)
{
if (strcmp (q, "wb"))
abort ();
free (q);
}
return 0;
}
/* { dg-final { scan-tree-dump-times "strlen \\(" 0 "strlen1" } } */
/* { dg-final { scan-tree-dump-times "strcpy \\(" 0 "strlen1" } } */
/* { dg-final { scan-tree-dump-times "strcat \\(" 0 "strlen1" } } */
/* { dg-final { scan-tree-dump-times "strchr \\(" 0 "strlen1" } } */
/* { dg-final { scan-tree-dump-times "stpcpy \\(" 0 "strlen1" } } */
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