Add basic support to code-gen the ARM/Thumb2 bit-field insert (BFI) instruction
and a combine pattern to use it for setting a bit-field to a constant
value. More to come for non-constant stores.

llvm-svn: 108570
8 files changed
tree: bbfe1ac9cc12f3f88858f5b3b5540ed5210f0c33
  1. clang/
  2. compiler-rt/
  3. libcxx/
  4. lldb/
  5. llvm/