[Patch] Fix for incorrect ABI in case we have an unused union argument passed by value

[John McCall]

On Aug 20, 2013, at 6:11 AM, Karthik Bhat <blitz.opensource at gmail.com> wrote:
> Please find the patch for incorrect ABI in case we have a union argument passed by value.

At the very least, you need to be checking for just transparent unions
instead of applying this logic uniformly to all unions.

John.