Revert "r293343 - [ubsan] Sanity-check shift amounts before truncation
(fixes PR27271)"

After r293343 clang fails to compile itself with -fsanitize=undefined (
http://lab.llvm.org:8080/green/job/clang-stage2-cmake-RgSan_build/).

rdar://30259929


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@293475 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed