[PATCH] Fix for crash during SjLj preparation step

[Bill Wendling]

I think there's some misunderstanding of what I'd like to see here. (I confused things by using 'null' for the example.) This is the type of code I was thinking of:

  def void @foo({} %c) {
      %fake_c = select i1 true, {} %c, {} undef
      ; subsequent uses of %fake_c in the code.

This should be valid for all types, whether they are aggregates or not. So you can replace the whole of that code with just this.

http://reviews.llvm.org/D4256