[PATCH] Allow the RegisterCoalescer to remove copies to reserved registers
qcolombet at apple.com
Wed Jan 14 15:31:37 PST 2015
> Perhaps we should restrict to the case of a reserved physical register?
Reserved registers are a different story and in that case, by all means, this is a good idea :).
> I can certainly try that if you don't like my suggestion above.
I like your suggestion, the copy propagation improvement is just another angle of attack I was envisioning. It may be generally useful, but if we do not have motivating example, I would leave that for later.
More information about the llvm-commits