Please include r283123 in 3.9.1

Dear LLVM-Developers,

Since my request for an account on https://llvm.org/bugs wasn’t granted yet and the deadline for merging features into 3.9.1 is closing, I use this way for asking r283123 to be merged into the llvm 3.9.1 branch. Maybe you know of other JIT-related fixes too.

Thanks,

Created: https://llvm.org/bugs/show_bug.cgi?id=31160

CC Tom Stellar.