[PATCH] Fix atomic libcall.

[Tim Northover]

  Hi again,

  Just re-read your code and realised it doesn't make any such assumption. I somehow missed that you went for IntPtrType.

  Looks good!

  Tim

http://llvm-reviews.chandlerc.com/D3006

BRANCH
  fix-atomic-libcall-2

ARCANIST PROJECT
  clang