gcc/testsuite/gcc.dg/attr-alloc_align-3.c

/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-optimized" } */

char *my_alloc1 (int len, int align) __attribute__((__alloc_align__ (2)));
char *my_alloc2 (int align, int len) __attribute__((alloc_align (1)));

int
test1 (int len)
{
  int i;
  char *p = my_alloc1 (len, 32);
  return ((__INTPTR_TYPE__) p) & 31;
}

int
test2 (int len)
{
  int i;
  char *p = my_alloc2 (32, len);
  return ((__INTPTR_TYPE__) p) & 31;
}

int
test3 (int len)
{
  int i;
  char *p = my_alloc1 (len, 16);
  return ((__INTPTR_TYPE__) p) & 15;
}

int
test4 (int len)
{
  int i;
  char *p = my_alloc2 (16, len);
  return ((__INTPTR_TYPE__) p) & 15;
}

int
test5 (int len, int align)
{
  int i;
  char *p = my_alloc1 (len, align);
  return ((__INTPTR_TYPE__) p) & 15;
}

int
test6 (int len, int align)
{
  int i;
  char *p = my_alloc2 (align, len);
  return ((__INTPTR_TYPE__) p) & 15;
}

/* { dg-final { scan-tree-dump-times "return 0" 4 "optimized" } } */