[mips] Clean up MipsISelDAGToDAG.cpp and MipsISelLowering.cpp.

- Rename function.
- Pass iterator by value.
- Remove header include.

No functionality changes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179312 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsCodeEmitter.cpp b/lib/Target/Mips/MipsCodeEmitter.cpp
index 1d86d90..3fc402b 100644
--- a/lib/Target/Mips/MipsCodeEmitter.cpp
+++ b/lib/Target/Mips/MipsCodeEmitter.cpp
@@ -116,7 +116,7 @@
                                   int Offset) const;
 
   /// Expand pseudo instructions with accumulator register operands.
-  void expandACCInstr(MachineBasicBlock::instr_iterator &MI,
+  void expandACCInstr(MachineBasicBlock::instr_iterator MI,
                       MachineBasicBlock &MBB, unsigned Opc) const;
 
   /// \brief Expand pseudo instruction. Return true if MI was expanded.
@@ -302,7 +302,7 @@
     MCE.emitWordBE(Word);
 }
 
-void MipsCodeEmitter::expandACCInstr(MachineBasicBlock::instr_iterator &MI,
+void MipsCodeEmitter::expandACCInstr(MachineBasicBlock::instr_iterator MI,
                                      MachineBasicBlock &MBB,
                                      unsigned Opc) const {
   // Expand "pseudomult $ac0, $t0, $t1" to "mult $t0, $t1".