[ARM] Declare Op within an if statement (NFC)

diff --git a/llvm/lib/Target/ARM/MVEGatherScatterLowering.cpp b/llvm/lib/Target/ARM/MVEGatherScatterLowering.cpp
index f36b341..b33e98e 100644 (file)
--- a/llvm/lib/Target/ARM/MVEGatherScatterLowering.cpp
+++ b/llvm/lib/Target/ARM/MVEGatherScatterLowering.cpp
@@ -939,11 +939,10 @@ bool MVEGatherScatterLowering::optimiseOffsets(Value *Offsets, BasicBlock *BB,
     return false;
 
   // The phi must be an induction variable
-  Instruction *Op;
   int IncrementingBlock = -1;
 
   for (int i = 0; i < 2; i++)
-    if ((Op = dyn_cast<Instruction>(Phi->getIncomingValue(i))) != nullptr)
+    if (auto *Op = dyn_cast<Instruction>(Phi->getIncomingValue(i)))
       if (Op->getOpcode() == Instruction::Add &&
           (Op->getOperand(0) == Phi || Op->getOperand(1) == Phi))
         IncrementingBlock = i;