Added register reassignment prototype to RAGreedy. It's a simple
heuristic to reshuffle register assignments when we can't find an
available reg.

llvm-svn: 121388
5 files changed
tree: 666b8cfa3ac4b9e2c15144d574f453672465b26f
  1. clang/
  2. compiler-rt/
  3. debuginfo-tests/
  4. libcxx/
  5. lldb/
  6. llvm/