CodeGen: Use MachineInstr& in RegAllocFast, NFC

Use MachineInstr& instead of MachineInstr* in RegAllocFast to avoid
implicit conversions from MachineInstrBundleIterator.  RAFast::spillAll
and RAFast::spillVirtReg still take iterators, since their argument may
be an end iterator from MachineBasicBlock::getFirstTerminator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274353 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed