gcc/testsuite/gcc.dg/tree-ssa/alias-31.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fno-tree-sra -fdump-tree-cddce1" } */
   3
   4 extern int posix_memalign(void **memptr,
   5                           __SIZE_TYPE__ alignment, __SIZE_TYPE__ size);
   6
   7 int foo (float *p)
   8 {
   9   int res = *p;
  10   struct { void *q1; void *q2; } q;
  11   if (posix_memalign (&q.q1, 128, 128 * sizeof (int)) != 0)
  12     return 0;
  13   if (posix_memalign (&q.q2, 128, 128 * sizeof (int)) != 0)
  14     return 0;
  15   *((int *)q.q1) = 1;
  16   *((int *)q.q2) = 2;
  17   return res + *p + *((int *)q.q1) + *((int *)q.q2);
  18 }
  19
  20 /* There should be only one load from *p left.  All stores and all
  21    other loads should be removed.  */
  22
  23 /* { dg-final { scan-tree-dump-times "\\\*\[^ \]" 1 "cddce1" } } */
  24 /* { dg-final { cleanup-tree-dump "cddce1" } } */