llvm/test/Regression/CFrontend/2002-07-30-SubregSetAssertion.c

// RUN: %llvmgcc -S %s -o - | llvm-as -f -o /dev/null


union X {
  void *B;
};

union X foo() {
	union X A;
	A.B = (void*)123;
	return A;
}