sdcc/support/regression/tests/gcc-torture-execute-pr63209.c

   1 /*
   2    pr63209.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 #pragma disable_warning 85
  10 #endif
  11
  12 static int Sub(int a, int b) {
  13   return  b - a;
  14 }
  15
  16 static unsigned Select(unsigned a, unsigned b, unsigned c) {
  17   const int pa_minus_pb =
  18       Sub((a >>  8) & 0xff, (b >>  8) & 0xff) +
  19       Sub((a >>  0) & 0xff, (b >>  0) & 0xff);
  20   (void)c;
  21   return (pa_minus_pb <= 0) ? a : b;
  22 }
  23
  24 unsigned Predictor(unsigned left, const unsigned* const top) {
  25   const unsigned pred = Select(top[1], left, top[0]);
  26   return pred;
  27 }
  28
  29 void
  30 testTortureExecute (void) {
  31   const unsigned top[2] = {0xff7a7a7a, 0xff7a7a7a};
  32   const unsigned left = 0xff7b7b7b;
  33   const unsigned pred = Predictor(left, top /*+ 1*/);
  34   ASSERT (pred == left);
  35 }