clang/test/CodeGenCXX/2005-02-11-AnonymousUnion.cpp

   1 // RUN: %clang_cc1 %s -emit-llvm -o -
   2
   3 // Test anonymous union with members of the same size.
   4 int test1(float F) {
   5   union {
   6      float G;
   7      int i;
   8   };
   9   G = F;
  10   return i;
  11 }
  12
  13 // test anonymous union with members of differing size.
  14 int test2(short F) {
  15   volatile union {
  16      short G;
  17      int i;
  18   };
  19   G = F;
  20   return i;
  21 }
  22
  23 // Make sure that normal unions work.  duh :)
  24 volatile union U_t {
  25   short S;
  26   int i;
  27 } U;
  28
  29 int test3(short s) {
  30   U.S = s;
  31   return U.i;
  32 }