Moritz Angermann authored May 20, 2017 and Ben Gamari committed May 20, 2017

The llvm textual ir seems to have stayed sufficiently similar from llvm
3.9 to llvm 4.0, such that a simple bump is possible.

Reviewers: austin, hvr, bgamari, erikd

Reviewed By: bgamari, erikd

Subscribers: rwbarton, thomie, erikd

Differential Revision: https://phabricator.haskell.org/D3591