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/* Copyright (C) 2000 Free Software Foundation.
Ensure all expected transformations of builtin strchr and index
occur and perform correctly.
Written by Jakub Jelinek, 11/7/2000. */
extern void abort (void);
extern char *strchr (const char *, int);
extern char *index (const char *, int);
int main()
{
const char *const foo = "hello world";
if (strchr (foo, 'x'))
abort ();
if (strchr (foo, 'o') != foo + 4)
abort ();
if (strchr (foo + 5, 'o') != foo + 7)
abort ();
if (strchr (foo, '\0') != foo + 11)
abort ();
/* Test only one instance of index since the code path is the same
as that of strchr. */
if (index ("hello", 'z') != 0)
abort ();
/* Test at least one instance of the __builtin_ style. We do this
to ensure that it works and that the prototype is correct. */
if (__builtin_strchr (foo, 'o') != foo + 4)
abort ();
if (__builtin_index (foo, 'o') != foo + 4)
abort ();
return 0;
}
static char *
index (const char *s, int c)
{
/* For systems which don't have index, we ensure no link failures
occur by always providing a backup definition. During
optimization this function aborts to catch errors. */
#ifdef __OPTIMIZE__
abort ();
#else
return strchr(s, c);
#endif
}
#ifdef __OPTIMIZE__
/* When optimizing, all the above cases should be transformed into
something else. So any remaining calls to the original function
should abort. */
__attribute__ ((noinline))
static char *
strchr (const char *s, int c)
{
abort ();
}
#endif
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