Avoid implicit iterator conversions from MachineInstrBundleIterator to
MachineInstr* in the Hexagon backend, mostly by preferring MachineInstr&
over MachineInstr* and switching to range-based for loops.
There's a long tail of API cleanup here, but I'm planning to leave the
rest to the Hexagon maintainers. HexagonInstrInfo defines many of its
own predicates, and most of them still take MachineInstr*. Some of
those actually check for nullptr, so I didn't feel comfortable changing
them to MachineInstr& en masse.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275142 91177308-0d34-0410-b5e6-96231b3b80d8
This includes code that is intended to be target-independent as well
as the Hexagon-specific details. This is just the framework without
any users.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241595 91177308-0d34-0410-b5e6-96231b3b80d8
