gcc/testsuite/gcc.dg/pr59605.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3 /* { dg-additional-options "-minline-stringops-dynamically" { target { i?86-*-* x86_64-*-* } } } */
   4
   5 extern void abort (void);
   6
   7 #define MAX_OFFSET (sizeof (long long))
   8 #ifndef MAX_COPY
   9 #define MAX_COPY (1024 + 8192)
  10 #endif
  11 #define MAX_EXTRA (sizeof (long long))
  12
  13 #define MAX_LENGTH (MAX_OFFSET + MAX_COPY + MAX_EXTRA)
  14
  15 static union {
  16   char buf[MAX_LENGTH];
  17   long long align_int;
  18   long double align_fp;
  19 } u;
  20
  21 char A[MAX_LENGTH];
  22
  23 int
  24 main ()
  25 {
  26   int off, len, i;
  27   char *p, *q;
  28
  29   for (i = 0; i < MAX_LENGTH; i++)
  30     A[i] = 'A';
  31
  32   for (off = 0; off < MAX_OFFSET; off++)
  33     for (len = 1; len < MAX_COPY; len++)
  34       {
  35         for (i = 0; i < MAX_LENGTH; i++)
  36           u.buf[i] = 'a';
  37
  38         p = __builtin_memcpy (u.buf + off, A, len);
  39         if (p != u.buf + off)
  40           abort ();
  41
  42         q = u.buf;
  43         for (i = 0; i < off; i++, q++)
  44           if (*q != 'a')
  45             abort ();
  46
  47         for (i = 0; i < len; i++, q++)
  48           if (*q != 'A')
  49             abort ();
  50
  51         for (i = 0; i < MAX_EXTRA; i++, q++)
  52           if (*q != 'a')
  53             abort ();
  54       }
  55
  56   return 0;
  57 }