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...RegClass is really supposed to take a register class enum value and get the register class object for it. It doesn't convert a register to a class. In fact there's not always a single or canonical class for a given register. What is the right way to do this? unsigned SrcReg = Reg + VA.getValNo(); unsigned DestReg = VA.getLocReg(); // Avoid a cross-class copy. This is very unlikely. if (!MRI.getRegClass(SrcReg)->contains(DestReg)) return false; ~Craig -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/...