gcc/testsuite/gcc.dg/pr58981.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2" } */
   3 /* { dg-additional-options "-minline-all-stringops" { target { i?86-*-* x86_64-*-* } } } */
   4
   5 extern void abort (void);
   6
   7 #define MAX_OFFSET (sizeof (long long))
   8 #define MAX_COPY (8 * sizeof (long long))
   9 #define MAX_EXTRA (sizeof (long long))
  10
  11 #define MAX_LENGTH (MAX_OFFSET + MAX_COPY + MAX_EXTRA)
  12
  13 static union {
  14   char buf[MAX_LENGTH];
  15   long long align_int;
  16   long double align_fp;
  17 } u;
  18
  19 char A[MAX_LENGTH];
  20
  21 int
  22 main ()
  23 {
  24   int off, len, i;
  25   char *p, *q;
  26
  27   for (i = 0; i < MAX_LENGTH; i++)
  28     A[i] = 'A';
  29
  30   for (off = 0; off < MAX_OFFSET; off++)
  31     for (len = 1; len < MAX_COPY; len++)
  32       {
  33         for (i = 0; i < MAX_LENGTH; i++)
  34           u.buf[i] = 'a';
  35
  36         p = __builtin_memcpy (u.buf + off, A, len);
  37         if (p != u.buf + off)
  38           abort ();
  39
  40         q = u.buf;
  41         for (i = 0; i < off; i++, q++)
  42           if (*q != 'a')
  43             abort ();
  44
  45         for (i = 0; i < len; i++, q++)
  46           if (*q != 'A')
  47             abort ();
  48
  49         for (i = 0; i < MAX_EXTRA; i++, q++)
  50           if (*q != 'a')
  51             abort ();
  52       }
  53
  54   return 0;
  55 }