gcc/testsuite/gcc.dg/pr50527.c

   1 /* { dg-do run } */
   2 /* { dg-options "-Os --param large-stack-frame=30 -Wno-pointer-to-int-cast" } */
   3
   4 extern void abort (void);
   5
   6 void __attribute__((noinline))
   7 bar (char *a)
   8 {
   9 }
  10
  11 void __attribute__((noinline))
  12 foo (char *a, int b)
  13 {
  14 }
  15
  16 void __attribute__((noinline))
  17 test_align (char *p, int aligned, unsigned int mask)
  18 {
  19   int p_aligned = ((unsigned long int)p & mask) == 0;
  20   if (aligned != p_aligned)
  21     abort ();
  22 }
  23
  24 int
  25 main ()
  26 {
  27   const int kIterations = 4;
  28   char results[kIterations];
  29   int i;
  30   unsigned int mask;
  31
  32   mask = 0xf;
  33   test_align (results, ((unsigned long int)results & mask) == 0, mask);
  34   mask = 0x7;
  35   test_align (results, ((unsigned long int)results & mask) == 0, mask);
  36   mask = 0x3;
  37   test_align (results, ((unsigned long int)results & mask) == 0, mask);
  38   mask = 0x1;
  39   test_align (results, ((unsigned long int)results & mask) == 0, mask);
  40
  41   bar (results);
  42   for (i = 0; i < kIterations; i++)
  43     foo ("%d ", results[i]);
  44
  45   return 0;
  46 }