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MIOperands/ConstMIOperands are classes iterating over the MachineOperand of a MachineInstr, however MachineInstr::mop_iterator does the same thing. I assume these two iterators exist to have a uniform interface to iterate over the operands of a machine instruction bundle and a single machine instruction. However in practice I find it more confusing to have 2 different iterator classes, so this patch transforms (nearly all) the code to use mop_iterators. The only exception being MIOperands::anlayzePhysReg() and MIOperands::analyzeVirtReg() still needing an equivalent, I leave that as an exercise for the next patch. Differential Revision: http://reviews.llvm.org/D9932 This version is slightly modified from the proposed revision in that it introduces MachineInstr::getOperandNo to avoid the extra counting variable in the few loops that previously used MIOperands::getOperandNo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238539 91177308-0d34-0410-b5e6-96231b3b80d8
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