[LV] Handle external uses of floating-point induction variables

Reference: https://bugs.llvm.org/show_bug.cgi?id=32758
Differential Revision: https://reviews.llvm.org/D32445

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301428 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed