Teach instsimplify some tricks about exact/nuw/nsw shifts.
improve interfaces to instsimplify to take this info.

llvm-svn: 125196
4 files changed
tree: a67839f0142cf8fb0cbdece65a9ced200d0a15c9
  1. clang/
  2. compiler-rt/
  3. debuginfo-tests/
  4. libcxx/
  5. lldb/
  6. llvm/