sdcc/support/regression/tests/gcc-torture-execute-pr63843.c

   1 /*
   2    pr60822.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 #endif
  10
  11 #include <limits.h>
  12 #include <string.h>
  13
  14 /* PR rtl-optimization/63843 */
  15
  16 static inline
  17 unsigned short foo (unsigned short v)
  18 {
  19   return (v << 8) | (v >> 8);
  20 }
  21
  22 unsigned short
  23 bar (unsigned char *x)
  24 {
  25   unsigned int a;
  26   unsigned short b;
  27   memcpy (&a, &x[0], sizeof (a));
  28   a ^= 0x80808080U;
  29   memcpy (&x[0], &a, sizeof (a));
  30   memcpy (&b, &x[2], sizeof (b));
  31   return foo (b);
  32 }
  33
  34 void
  35 testTortureExecute (void)
  36 {
  37   unsigned char x[8] = { 0x01, 0x01, 0x01, 0x01 };
  38   if (CHAR_BIT == 8
  39       && sizeof (short) == 2
  40       && sizeof (int) == 4
  41       && bar (x) != 0x8181U)
  42     ASSERT (0);
  43   return;
  44 }