clang/test/Sema/darwin-align-cast.c

   1 // RUN: %clang_cc1 -fsyntax-only -Wno-pointer-to-int-cast -verify %s
   2 typedef long unsigned int __darwin_size_t;
   3 typedef long __darwin_ssize_t;
   4 typedef __darwin_size_t size_t;
   5 typedef __darwin_ssize_t ssize_t;
   6
   7 struct cmsghdr {};
   8
   9 #if 0
  10 This code below comes from the following system headers:
  11 sys/socket.h:#define CMSG_SPACE(l) (__DARWIN_ALIGN(sizeof(struct
  12 cmsghdr)) + __DARWIN_ALIGN(l))
  13
  14 i386/_param.h:#define __DARWIN_ALIGN(p) ((__darwin_size_t)((char *)(p)
  15 + __DARWIN_ALIGNBYTES) &~ __DARWIN_ALIGNBYTES)
  16 #endif
  17
  18 ssize_t sendFileDescriptor(int fd, void *data, size_t nbytes, int sendfd) {
  19   union {
  20     // expected-warning@+1 {{folded to constant array}}
  21     char control[(((__darwin_size_t)((char *)(sizeof(struct cmsghdr)) + (sizeof(__darwin_size_t) - 1)) &~ (sizeof(__darwin_size_t) - 1)) + ((__darwin_size_t)((char *)(sizeof(int)) + (sizeof(__darwin_size_t) - 1)) &~ (sizeof(__darwin_size_t) - 1)))];
  22   } control_un;
  23   return 0;
  24 }
  25