[AVR] Lower i128 divisions to runtime library calls

This patch adds i128 division support by instruction LLVM to lower
128-bit divisions to the __udivmodti4 and __divmodti4 rtlib functions.

This also adds test for 64-bit division and 128-bit division.

Patch by Peter Nimmervoll.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@327814 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed