search for: mo_registermask

I just added a new type of MachineOperand to the code generator: MO_RegisterMask. Register mask operands are used on machine instructions that clobber large sets of registers, typically calls. Instead of a long list of <imp-def> operands, a call now has a single <regmask> operand that contains a pointer to a bit mask of call-preserved registers. This reduces memory...