sdcc/support/regression/tests/bug-2712.c

   1 /*
   2    bug-2458.c
   3    In backends that support 16x16->32 multiplication, there was a bug when
   4    operands to such a multiplication were used in multiple such multiplications.
   5 */
   6
   7 #include <testfwk.h>
   8
   9 #ifndef __SDCC_pdk14 // Lack of memory - see RFE #606
  10 int dummy(int x)
  11 {
  12    return x;
  13 }
  14
  15 void dummy2(long x)
  16 {
  17    ASSERT(x == 42 * 42 || x == -42 * 42);
  18 }
  19 #endif
  20
  21 void testBug(void)
  22 {
  23 #ifndef __SDCC_pdk14 // Lack of memory
  24    int i, j;
  25
  26    // Double use of i and j.
  27    i = dummy(42);
  28    j = dummy(42);
  29    dummy2((long)i * (long)j);
  30    i = -i;
  31    dummy2((long)i * (long)j);
  32
  33    // Single use of i and j.
  34    i = dummy(42);
  35    j = dummy(42);
  36    dummy2((long)i * (long)j);
  37 #endif
  38 }
  39