ARM simplify the postidx_reg operand encoding.

The immediate portion of the operand is just a boolean (the 'U' bit indicating
add vs. subtract). Treat it as such.

llvm-svn: 136969
4 files changed
tree: 0d0d9d786c4d8ed28eb2b0b35905e3411db89a6c
  1. clang/
  2. compiler-rt/
  3. debuginfo-tests/
  4. libcxx/
  5. libcxxabi/
  6. lldb/
  7. llvm/
  8. polly/