CodeGen: Use MachineInstr& in IfConversion, NFC

Switch to a range-based for in IfConverter::PredicateBlock and take
MachineInstr& in MaySpeculate to avoid an implicit conversion from
MachineBasicBlock::iterator to MachineInstr*.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@274290 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed