validation/constexpr-pure-builtin.c

   1 // requires constant integer expressions
   2 static int bar[] = {
   3         [__builtin_bswap16(0x1234)] = 0,                // OK
   4         [__builtin_bswap32(0x1234)] = 0,                // OK
   5         [__builtin_bswap64(0x1234)] = 0,                // OK
   6 };
   7
   8 // requires constant integers
   9 static int foo(unsigned long long a)
  10 {
  11         switch (a) {
  12         case __builtin_bswap16(1   <<  8):
  13         case __builtin_bswap32(2L  << 24):
  14         case __builtin_bswap64(3LL << 56):
  15                 return 0;
  16         default:
  17                 return 1;
  18         }
  19 }
  20
  21 /*
  22  * check-name: constness of pure/const builtins
  23  */