[LLVMdev] Generating libcalls and operation legalization

[Scott Michel]

I understand why SelectionDAGLegalize is a completely hidden class  
(but does it really need to be completely hidden?) However, if a  
target backend has to generate a libcall, shouldn't there be an  
exposed API to do this? Or should there be another bit added to the  
Legal/Custom/Expand/Promote enum to force generation of a libcall?

I'm trying to avoid duplicating work already done in the  
SelectionDAGLegalize source (ExpandLibCall) and want to make sure  
that both the call and the callseq_end are properly legalzed.


-scooter