XXX - Increase unroll threshold

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213459 91177308-0d34-0410-b5e6-96231b3b80d8
Fix build with GCC.

Seems like a bug in either GCC or clang, but I'm
not sure which is right.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213460 91177308-0d34-0410-b5e6-96231b3b80d8
Revert accidentally committed r213459

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213461 91177308-0d34-0410-b5e6-96231b3b80d8