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

[Jim Grosbach]

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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