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Hello everybody, hi Evan, this patch changes the lowering of arguments for tail call optimized calls. Before arguments that could be overwritten by each other were explicitly lowered to a stack slot, not giving the register allocator a chance to optimize. Now a sequence of copyto/copyfrom virtual registers ensures that arguments are loaded in (virtual) registers before they are lowered to the

...getImm(); Etc.. } - to access the data from both MC and MI layers. However, templating here may not be safest way to share code implementing the same functionality between MC and MI. Other possibilities include using virtual functions like: getOperand(0).getReg() replaced by opreg(0), Where opreg(x) would be a virtual function in a base class, which TargetMCInst/TargetMachineInstruction would implement (and avoid MCOperands/MIOperands). Another option would be to use function pointers. Is there a preferred way to share code between MI and MC? Thanks and Regar...