search for: getcostfor

Hi, Yes, that's what I would do. If you want LLVM and the register allocator to also know that the instruction explicitly defines the register, I would designate the register into it's own register class and have your instruction write to that class (and there will be only a single option for RA). cheers, Sam Sam Parker Research Student Electronic Systems Design Group Loughborough

...http://goo.gl/62tpkk), but everything goes broken on > scheduling. > > I had to chain mine nodes, because otherwise nodes xmac and srxacc got > removed on first combine. But since they are chained, they have > MVT::Other return type, and that causes strange crash inside func > GetCostFor in ScheduleDAGRRList.cpp: > > Def RegClass = TLI->getRepRegClassFor(VT)->getID(); > When VT is MVT::Other it returns 0x0, what results crash. > > It got me confused, because reading documentation on CodeGen gave me > an idea, that chain edges are control flow edges, not dat...