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__attribute__ ((externally_visible)) int global;

int func(void);

/* These must fail.  */

int bad0(void) { return __builtin_constant_p(global); }

int bad1(void) { return __builtin_constant_p(global++); }

inline int bad2(int x) { return __builtin_constant_p(x++); }

inline int bad3(int x) { return __builtin_constant_p(x); }

inline int bad4(const char *x) { return __builtin_constant_p(x); }

int bad5(void) { return bad2(1); }

inline int bad6(int x) { return __builtin_constant_p(x+1); }

int bad7(void) { return __builtin_constant_p(func()); }

int bad8(void) { char buf[10]; return __builtin_constant_p(buf); }

int bad9(const char *x) { return __builtin_constant_p(x[123456]); }

int bad10(void) { return __builtin_constant_p(&global); }

/* These must pass, or we've broken gcc2 functionality.  */

int good0(void) { return __builtin_constant_p(1); }

int good1(void) { return __builtin_constant_p("hi"); }

int good2(void) { return __builtin_constant_p((1234 + 45) & ~7); }

/* These are extensions to gcc2.  Failure indicates an optimization

   regression.  */

int opt0(void) { return bad3(1); }

int opt1(void) { return bad6(1); }

int opt2(void) { return __builtin_constant_p("hi"[0]); }

/*

 * Opt3 is known to fail.  It is one of the important cases that glibc

 * was interested in though, so keep this around as a reminder.

 *

 * The solution is to add bits to recover bytes from constant pool

 * elements given nothing but a constant pool label and an offset.

 * When we can do that, and we can simplify strlen after the fact,

 * then we can enable recognition of constant pool labels as constants.

 */

/* int opt3(void) { return bad4("hi"); } */

/* Call through tables so -finline-functions can't screw with us.  */

int (* volatile bad_t0[])(void) = {

        bad0, bad1, bad5, bad7, bad8, bad10

};

int (* volatile bad_t1[])(int x) = {

        bad2, bad3, bad6

};

int (* volatile bad_t2[])(const char *x) = {

        bad4, bad9

};

int (* volatile good_t0[])(void) = {

        good0, good1, good2

};

int (* volatile opt_t0[])(void) = {

        opt0, opt1, opt2 /* , opt3 */

};

#define N(arr) (sizeof(arr)/sizeof(*arr))

int main()

{

  int i;

  for (i = 0; i < N(bad_t0); ++i)

    if ((*bad_t0[i])())

      abort();

  for (i = 0; i < N(bad_t1); ++i)

    if ((*bad_t1[i])(1))

      abort();

  for (i = 0; i < N(bad_t2); ++i)

    if ((*bad_t2[i])("hi"))

      abort();

  for (i = 0; i < N(good_t0); ++i)

    if (! (*good_t0[i])())

      abort();

#ifdef __OPTIMIZE__

  for (i = 0; i < N(opt_t0); ++i)

    if (! (*opt_t0[i])())

      abort();

#endif

  exit(0);

}