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a36fe73645
This function does more or less the same as MI::readsWritesVirtualRegister(), but it supports bundles as well. It also determines if any constraint requires reading and writing operands to use the same register. Most clients want to know. Use the more modern MO.readsReg() instead of trying to sort out undefs and partial redefines. Stop supporting the extra full <imp-def> operand as an alternative to <def,undef> sub-register defines. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151690 91177308-0d34-0410-b5e6-96231b3b80d8
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