1  /* { dg-do compile } */
       2  /* { dg-require-effective-target bswap } */
       3  /* { dg-options "-O2 -fdump-tree-bswap" } */
       4  /* { dg-additional-options "-march=z900" { target s390-*-* } } */
       5  
       6  typedef unsigned char u8;
       7  typedef unsigned int u32;
       8  union __anonunion
       9  {
      10    u32 value;
      11    u8 bytes[4];
      12  };
      13  
      14  u32
      15  acpi_ut_dword_byte_swap (u32 value)
      16  {
      17    union __anonunion in;
      18    in.value = value;
      19  #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
      20    return ((in.bytes[0] << 24) | (in.bytes[1] << 16)
      21  	  | (in.bytes[2] << 8) | in.bytes[3]);
      22  #else
      23    return ((in.bytes[3] << 24) | (in.bytes[2] << 16)
      24  	  | (in.bytes[1] << 8) | in.bytes[0]);
      25  #endif
      26  }
      27  
      28  /* { dg-final { scan-tree-dump "32 bit bswap implementation found at" "bswap" } } */