sdcc/support/regression/tests/bug-2776.c

   1 /*
   2    bug-2776.c. Originally a segfault on trying to pass an array element as variable argument struct parameter.
   3    Later a iCode generation issue for pdk that triggered an assertion in codegen (when trying
   4    to pass an array element of size 1 as a variable argument struct parameter).
   5  */
   6
   7 #include <testfwk.h>
   8
   9 #pragma disable_warning 283
  10 #pragma disable_warning 278
  11
  12 #include <stdarg.h>
  13
  14 struct tiny
  15 {
  16   char c;
  17 };
  18
  19 void f (int n, ...);
  20
  21 void m ()
  22 {
  23   struct tiny x[3];
  24   x[0].c = 10;
  25   x[1].c = 11;
  26   x[2].c = 12;
  27
  28   f (3, x[0], x[1], x[2], (long) 123);
  29 }
  30
  31 void f (int n, ...)
  32 {
  33         ASSERT (n == 3);
  34         struct tiny x;
  35
  36         va_list args;
  37         va_start(args, n);
  38         x = va_arg (args, struct tiny);
  39         ASSERT (x.c == 10);
  40         x = va_arg (args, struct tiny);
  41         ASSERT (x.c == 11);
  42         x = va_arg (args, struct tiny);
  43         ASSERT (x.c == 12);
  44
  45         ASSERT (va_arg (args, long) == 123);
  46
  47         va_end (args);
  48 }
  49
  50 void
  51 testBug (void)
  52 {
  53 #ifndef __OpenBSD__ // Known to fail on OpenBSD 7.3 powerpc64 (don't know for other OpenBSD versions or archs) reported to OpenBSD.
  54   m ();
  55 #endif
  56 }
  57
  58
  59