sdcc/support/regression/tests/gcc-torture-execute-20010910-1.c

   1 /*
   2    20010910-1.c from the execute part of the gcc torture tests.
   3  */
   4
   5 #include <testfwk.h>
   6
   7 #ifdef __SDCC
   8 #pragma std_c99
   9 #endif
  10
  11 /* Test case contributed by Ingo Rohloff <rohloff@in.tum.de>.
  12    Code distilled from Linux kernel.  */
  13
  14 /* Compile this program with a gcc-2.95.2 using
  15    "gcc -O2" and run it. The result will be that
  16    rx_ring[1].next == 0   (it should be == 14)
  17    and
  18    ep.skbuff[4] == 5      (it should be 0)
  19 */
  20
  21 #ifndef __SDCC_pdk14 // Lack of memory
  22 extern void abort(void);
  23
  24 struct epic_rx_desc
  25 {
  26   unsigned int next;
  27 };
  28
  29 struct epic_private
  30 {
  31   struct epic_rx_desc *rx_ring;
  32   unsigned int rx_skbuff[5];
  33 };
  34
  35 static void epic_init_ring(struct epic_private *ep)
  36 {
  37   int i;
  38
  39   for (i = 0; i < 5; i++)
  40   {
  41     ep->rx_ring[i].next = 10 + (i+1)*2;
  42     ep->rx_skbuff[i] = 0;
  43   }
  44   ep->rx_ring[i-1].next = 10;
  45 }
  46
  47 static int check_rx_ring[5] = { 12,14,16,18,10 };
  48 #endif
  49
  50 void
  51 testTortureExecute (void)
  52 {
  53 #ifndef __SDCC_pdk14 // Lack of memory
  54   struct epic_private ep;
  55   struct epic_rx_desc rx_ring[5];
  56   int i;
  57
  58   for (i=0;i<5;i++)
  59   {
  60     rx_ring[i].next=0;
  61     ep.rx_skbuff[i]=5;
  62   }
  63
  64   ep.rx_ring=rx_ring;
  65   epic_init_ring(&ep);
  66
  67   for (i=0;i<5;i++)
  68   {
  69     if ( rx_ring[i].next != check_rx_ring[i] ) ASSERT(0);
  70     if ( ep.rx_skbuff[i] != 0 ) ASSERT(0);
  71   }
  72   return;
  73 #endif
  74 }
  75