[LLVMdev] request for help writing a register allocator

[Lang Hames]

>
> > So if AL is a sub-register of EAX (assume this is true even if not),
> > then will getAliasSet(AL) include EAX, and will getAliasSet(EAX)
> > include AL? If yes, then I think I'm OK.
>
> Yes, I believe so.


Yep - that's correct. Watch out for a potential gotcha though:
getAliasSet(EAX) does not include EAX itself (and in general physregs do not
appear in their alias sets).




> -Chris
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