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The normal insert() function takes an MBB::iterator position, and inserts a stand-alone MachineInstr as before. The insert() function that takes an MBB::instr_iterator position can insert instructions inside a bundle, and will now update the bundle flags correctly when that happens. When the insert position is between two bundles, it is unclear whether the instruction should be appended to the previous bundle, prepended to the next bundle, or stand on its own. The MBB::insert() function doesn't bundle the instruction in that case, use the MIBundleBuilder class for that. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@170437 91177308-0d34-0410-b5e6-96231b3b80d8
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