view gcc/testsuite/gcc.c-torture/execute/991016-1.c @ 158:494b0b89df80 default tip

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author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Mon, 25 May 2020 18:13:55 +0900
parents 04ced10e8804
children
line wrap: on
line source

/* Two of these types will, on current gcc targets, have the same
   mode but have different alias sets.  DOIT tries to get gcse to
   invalidly hoist one of the values out of the loop.  */

typedef int T0;
typedef long T1;
typedef long long T2;

int
doit(int sel, int n, void *p)
{
  T0 * const p0 = p;
  T1 * const p1 = p;
  T2 * const p2 = p;

  switch (sel)
    {
    case 0:
      do 
	*p0 += *p0;
      while (--n);
      return *p0 == 0;

    case 1:
      do 
	*p1 += *p1;
      while (--n);
      return *p1 == 0;

    case 2:
      do 
	*p2 += *p2;
      while (--n);
      return *p2 == 0;

    default:
      abort ();
    }
}

int
main()
{
  T0 v0; T1 v1; T2 v2;

  v0 = 1; doit(0, 5, &v0);
  v1 = 1; doit(1, 5, &v1);
  v2 = 1; doit(2, 5, &v2);

  if (v0 != 32) abort ();
  if (v1 != 32) abort ();
  if (v2 != 32) abort ();

  exit (0);
}