We were previously creating a global variable of function type,
which is invalid IR. This issue was exposed by r304690, in which we
started asserting that global variables were of a valid type.
Fixes PR33462.
Differential Revision: https://reviews.llvm.org/D36438
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@310543 91177308-0d34-0410-b5e6-96231b3b80d8
Peter Collingbourne