add enough support for indirect branch for the feature test to pass
(assembler,asmprinter, bc reader+writer) and document it.  Codegen
currently aborts on it.

llvm-svn: 85274
17 files changed
tree: c7091596f0ce2ecf767758f356c2f1725cc05e1d
  1. clang/
  2. compiler-rt/
  3. llvm/