[AArch64]: range loopify frame-lowering

llvm-svn: 316960
diff --git a/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp b/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
index 60f8511..8ebcaff 100644
--- a/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
+++ b/llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
@@ -155,8 +155,8 @@
           MI.getOpcode() == AArch64::ADDSXri)
         continue;
 
-      for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
-        if (!MI.getOperand(i).isFI())
+      for (const MachineOperand &MO : MI.operands()) {
+        if (!MO.isFI())
           continue;
 
         int Offset = 0;