clang/test/CodeGen/2002-08-02-UnionTest.c

   1 // RUN: %clang_cc1 -emit-llvm %s  -o /dev/null
   2
   3 /* In this testcase, the return value of foo() is being promoted to a register
   4  * which breaks stuff
   5  */
   6 int printf(const char * restrict format, ...);
   7
   8 union X { char X; void *B; int a, b, c, d;};
   9
  10 union X foo(void) {
  11   union X Global;
  12   Global.B = (void*)123;   /* Interesting part */
  13   return Global;
  14 }
  15
  16 int main(void) {
  17   union X test = foo();
  18   printf("0x%p", test.B);
  19 }