[LLVMdev] [LLVMDev] May Physical Registers be given to the register allocator?

Jim Grosbach
Fri, 03 Sep 2010 21:53:25 -0000

Machine instructions coming in to the register allocator may already have
physical register operands, yes. For example, some instructions generated by
isel will already have physical registers referenced.

-Jim

On Sep 3, 2010, at 1:04 PM, Jeff Kunkel wrote:

> May Physical Registers be given to the register allocator?
>
> I would think the allocator would be the only pass allowed to modify
virtual registers, but maybe this is wishful thinking.
>
> Thanks,
> Jeff Kunkel
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