[thirdparty/gcc.git] / gcc / testsuite / gcc.dg / tree-ssa / clz-char.c

/* { dg-do run } */
/* { dg-require-effective-target clzl } */
/* { dg-options "-O2 -fno-tree-ch -fdump-tree-optimized" } */

#define PREC (__CHAR_BIT__)

int
__attribute__ ((noinline, noclone))
foo (unsigned char b) {
    int c = 0;

    if (b == 0)
      return PREC;

    while (!(b & (1 << (PREC - 1)))) {
	b <<= 1;
	c++;
    }

    return c;
}

int main()
{
  if (foo(0) != PREC)
    __builtin_abort ();
  if (foo(1 << (PREC - 1)) != 0)
    __builtin_abort ();
  if (foo(35) != PREC - 6)
    __builtin_abort ();
  return 0;
}

/* { dg-final { scan-tree-dump-times "__builtin_clz|\\.CLZ" 1 "optimized" } } */
Commit	Line	Data
4798080d AC	1	/* { dg-do run } */
	2	/* { dg-require-effective-target clzl } */
	3	/* { dg-options "-O2 -fno-tree-ch -fdump-tree-optimized" } */
	4
	5	#define PREC (__CHAR_BIT__)
	6
	7	int
	8	__attribute__ ((noinline, noclone))
	9	foo (unsigned char b) {
	10	int c = 0;
	11
	12	if (b == 0)
	13	return PREC;
	14
	15	while (!(b & (1 << (PREC - 1)))) {
	16	b <<= 1;
	17	c++;
	18	}
	19
	20	return c;
	21	}
	22
	23	int main()
	24	{
	25	if (foo(0) != PREC)
	26	__builtin_abort ();
	27	if (foo(1 << (PREC - 1)) != 0)
	28	__builtin_abort ();
	29	if (foo(35) != PREC - 6)
	30	__builtin_abort ();
	31	return 0;
	32	}
	33
	34	/* { dg-final { scan-tree-dump-times "__builtin_clz\|\\.CLZ" 1 "optimized" } } */