gcc/testsuite/gcc.dg/multiword-1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O3" } */
   3 /* { dg-require-effective-target ilp32 } */
   4
   5 typedef unsigned int u32;
   6 typedef unsigned long long u64;
   7
   8 u64 __attribute__((noinline))
   9 foo (u32 high, u32 low)
  10 {
  11   return ((u64)high << 32) | low;
  12 }
  13
  14 u32 __attribute__((noinline))
  15 right (u64 t)
  16 {
  17   return (u32)(t >> 32);
  18 }
  19
  20 u64 __attribute__((noinline))
  21 left (u32 t)
  22 {
  23   return (u64)t << 32;
  24 }
  25
  26 u32 __attribute__((noinline))
  27 right2 (u64 t)
  28 {
  29   return (u32)(t >> 40);
  30 }
  31
  32 u64 __attribute__((noinline))
  33 left2 (u32 t)
  34 {
  35   return (u64)t << 40;
  36 }
  37
  38 u64 __attribute__((noinline))
  39 zeroextend (u32 t)
  40 {
  41   return (u64)t;
  42 }
  43
  44 extern void abort ();
  45
  46 int
  47 main ()
  48 {
  49   if (foo (13000, 12000) != 55834574860000ULL)
  50     abort ();
  51
  52   if (right (55834574860000ULL) != 13000)
  53     abort ();
  54
  55   if (left (13000) != 55834574848000ULL)
  56     abort ();
  57
  58   if (right2 (55834574860000ULL) != 50)
  59     abort ();
  60
  61   if (left2 (13000) != 14293651161088000ULL)
  62     abort ();
  63
  64   if (zeroextend (13000) != 13000ULL)
  65     abort ();
  66
  67   return 0;
  68 }