llvm-6502/test/FrontendC/2002-08-02-UnionTest.c

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// RUN: %llvmgcc -S %s -o - | llvm-as -f -o /dev/null
/* In this testcase, the return value of foo() is being promotedto a register
* which breaks stuff
*/
#include <stdio.h>
union X { char X; void *B; int a, b, c, d;};
union X foo() {
union X Global;
Global.B = (void*)123; /* Interesting part */
return Global;
}
void main() {
union X test = foo();
printf("0x%p", test.B);
}