[llvm] [X86] combineSelect - pull out repeated getOperand() calls. NFC. (PR #174164)

[Simon Pilgrim via llvm-commits]

https://github.com/RKSimon created https://github.com/llvm/llvm-project/pull/174164

None

>From 110a45c69a3782b3221c93285f87d00697135f3e Mon Sep 17 00:00:00 2001
From: Simon Pilgrim <llvm-dev at redking.me.uk>
Date: Thu, 1 Jan 2026 22:59:32 +0000
Subject: [PATCH] [X86] combineSelect - pull out repeated getOperand() calls.
 NFC.

---
 llvm/lib/Target/X86/X86ISelLowering.cpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 20136ade7c317..21dd26bec7681 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -48442,7 +48442,8 @@ static SDValue combineSelect(SDNode *N, SelectionDAG &DAG,
       Cond.getOperand(0).getScalarValueSizeInBits() == EltBitWidth) {
     // The 'and' mask must be composed of power-of-2 constants.
     SDValue And = Cond.getOperand(0);
-    auto *C = isConstOrConstSplat(And.getOperand(1));
+    SDValue Mask = And.getOperand(1);
+    auto *C = isConstOrConstSplat(Mask);
     if (C && C->getAPIntValue().isPowerOf2()) {
       // vselect (X & C == 0), LHS, RHS --> vselect (X & C != 0), RHS, LHS
       SDValue NotCond =
@@ -48457,12 +48458,10 @@ static SDValue combineSelect(SDNode *N, SelectionDAG &DAG,
         TLI.isTypeLegal(VT) && ((Subtarget.hasAVX() && EltBitWidth == 32) ||
                                 (Subtarget.hasAVX2() && EltBitWidth == 64) ||
                                 (Subtarget.hasXOP()));
-    if (CanShiftBlend &&
-        ISD::matchUnaryPredicate(And.getOperand(1), [](ConstantSDNode *C) {
+    if (CanShiftBlend && ISD::matchUnaryPredicate(Mask, [](ConstantSDNode *C) {
           return C->getAPIntValue().isPowerOf2();
         })) {
       // Create a left-shift constant to get the mask bits over to the sign-bit.
-      SDValue Mask = And.getOperand(1);
       SmallVector<int, 32> ShlVals;
       for (unsigned i = 0, e = VT.getVectorNumElements(); i != e; ++i) {
         auto *MaskVal = cast<ConstantSDNode>(Mask.getOperand(i));