[PATCH] D11319: Pass subtarget feature "+reserve-r9" instead of passing backend option "-arm-reserve-r9"

[Eric Christopher]

echristo added a comment.

The only other use case I can think of is something like the -ffixed-reg= option. I remember there being some issues with trying that in the register allocator, but it might make sense.

Thoughts?

-eric


http://reviews.llvm.org/D11319