[PATCH] D11462: [AArch64] Pass subtarget feature "+reserve-x18"

[Akira Hatanaka]

ahatanak added a subscriber: t.p.northover.
ahatanak added a comment.

It doesn't look like there was any particular reason for not defining an inverse option that cancels ffixed-x18, but we can add one in Options.td if it's important to do so.


http://reviews.llvm.org/D11462