sdcc/support/regression/tests/bug-3641.c

   1 /* bug-3641.c
   2    The hc08/s08 backend omitted the least-significant byte in an assignment of a literal to a local 24-bit variable, depending on which registers it resided in.
   3 */
   4
   5 #include <testfwk.h>
   6
   7 #include <stdint.h>
   8
   9 #if __SDCC_BITINT_MAXWIDTH >= 32 // TODO: When we can regression-test in --std-c23 mode, use the standard macro from limits.h instead!
  10 // In both assignments to i, the least-significant byte gets omitted.
  11 void loopm2(unsigned char *a)
  12 {
  13     for (unsigned _BitInt(24) i = (1ul << 20); i < (1ul << 20) + 1; i = (1ul << 20) + 1)
  14         a[i - (1ul << 20)] = 1;
  15 }
  16 #endif
  17
  18 void
  19 testBug(void)
  20 {
  21 #if __SDCC_BITINT_MAXWIDTH >= 32 // TODO: When we can regression-test in --std-c23 mode, use the standard macro from limits.h instead!
  22         char c = 0;
  23         loopm2(&c);
  24 #ifndef __SDCC_pdk15 // Bug #3643.
  25         ASSERT(c == 1);
  26 #endif
  27 #endif
  28 }
  29