[mips] More range-based for loops. NFC.

There are still a couple more inside the MIPS target. I opted for a single
commit in order to avoid spamming the list.

llvm-svn: 266472

llvm/lib/Target/Mips/MipsAsmPrinter.cpp

@@ -1053,10 +1053,9 @@ void MipsAsmPrinter::NaClAlignIndirectJumpTargets(MachineFunction &MF) {
   }
 
   // If basic block address is taken, block can be target of indirect branch.
-  for (MachineFunction::iterator MBB = MF.begin(), E = MF.end();
-                                 MBB != E; ++MBB) {
-    if (MBB->hasAddressTaken())
-      MBB->setAlignment(MIPS_NACL_BUNDLE_ALIGN);
+  for (auto &MBB : MF) {
+    if (MBB.hasAddressTaken())
+      MBB.setAlignment(MIPS_NACL_BUNDLE_ALIGN);
   }
 }
 

llvm/lib/Target/Mips/MipsLongBranch.cpp

@@ -165,8 +165,8 @@ void MipsLongBranch::splitMBB(MachineBasicBlock *MBB) {
 void MipsLongBranch::initMBBInfo() {
   // Split the MBBs if they have two branches. Each basic block should have at
   // most one branch after this loop is executed.
-  for (MachineFunction::iterator I = MF->begin(), E = MF->end(); I != E;)
-    splitMBB(&*I++);
+  for (auto &MBB : *MF)
+    splitMBB(&MBB);
 
   MF->RenumberBlocks();
   MBBInfos.clear();

llvm/lib/Target/Mips/MipsSEFrameLowering.cpp

@@ -86,10 +86,10 @@ ExpandPseudo::ExpandPseudo(MachineFunction &MF_)
 bool ExpandPseudo::expand() {
   bool Expanded = false;
 
-  for (MachineFunction::iterator BB = MF.begin(), BBEnd = MF.end();
-       BB != BBEnd; ++BB)
-    for (Iter I = BB->begin(), End = BB->end(); I != End;)
-      Expanded |= expandInstr(*BB, I++);
+  for (auto &MBB : MF) {
+    for (Iter I = MBB.begin(), End = MBB.end(); I != End;)
+      Expanded |= expandInstr(MBB, I++);
+  }
 
   return Expanded;
 }