[ARM] Fix issue with large xor constants.

Fixup to rL325573 for large xor constants.

Thanks to Eli Friedman for the catch.

Differential revision: https://reviews.llvm.org/D43549



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@325761 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed