stub out a new libanalysis "instruction simplify" interface that
takes decimated instructions and applies identities to them.  This
is pretty minimal at this point, but I plan to pull some instcombine
logic out into these and similar routines.

llvm-svn: 86613
3 files changed
tree: c171447a033261818a4c4021e014791aba2ad53a
  1. clang/
  2. compiler-rt/
  3. llvm/