gcc/testsuite/gcc.dg/20040916-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3
   4 /* PR17513 - we hit a bug where EDGE_EXECUTABLE was not cleared on
   5    successors of the entry block.  This lead to a flow verification
   6    error much later in the compilation (after gcse).  */
   7 typedef unsigned char uint8;
   8 typedef unsigned int uint32;
   9
  10 uint32 marker = 0;
  11 uint8 *buff = 0;
  12 uint32 bsize = 0;
  13
  14 extern int foo (void);
  15
  16 uint32
  17 bar (void)
  18 {
  19   int len, d;
  20
  21   for (;;)
  22     {
  23       if (foo () == 0)
  24         return (0);
  25
  26       switch (marker)
  27         {
  28         case 0xfe:
  29           {
  30             len |= (*buff++);
  31             bsize -= 2;
  32
  33             while (len > 0)
  34               {
  35                 d = *buff++;
  36                 len--;
  37               }
  38           }
  39           break;
  40         default:
  41           break;
  42         }
  43     }
  44 }
  45