sdcc/support/regression/tests/bug1717943.c

   1 /*
   2    bug1717943c.c
   3      an error in the detection of loopinvariants,
   4       will move the foo=0 initialisation out of the loops.
   5  */
   6
   7 #include <testfwk.h>
   8
   9 char foo, firstcall;
  10
  11 char check(void)
  12 {
  13   if(!firstcall)
  14     return 1;
  15
  16   firstcall=0;
  17   foo = 42;
  18   return 0;
  19 }
  20
  21 void bug(void)
  22 {
  23   while(1) {
  24     foo = 0;
  25     while(check())
  26       if(check())
  27         return;
  28   }
  29 }
  30
  31
  32 void
  33 testBug(void)
  34 {
  35   firstcall = 1;
  36   bug();
  37   ASSERT(foo == 0);
  38 }