[llvm] [CodeGen] Avoid repeated hash lookups (NFC) (PR #135540)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/135540

None

>From eb9307e967e112fffb72b1c6ea8b4aec3613c187 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sun, 13 Apr 2025 04:37:25 -0700
Subject: [PATCH] [CodeGen] Avoid repeated hash lookups (NFC)

---
 llvm/lib/CodeGen/ComplexDeinterleavingPass.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/CodeGen/ComplexDeinterleavingPass.cpp b/llvm/lib/CodeGen/ComplexDeinterleavingPass.cpp
index 4cd378f9aa595..a83982de14b28 100644
--- a/llvm/lib/CodeGen/ComplexDeinterleavingPass.cpp
+++ b/llvm/lib/CodeGen/ComplexDeinterleavingPass.cpp
@@ -2332,8 +2332,9 @@ void ComplexDeinterleavingGraph::replaceNodes() {
     } else if (RootNode->Operation ==
                ComplexDeinterleavingOperation::ReductionSingle) {
       auto *RootInst = cast<Instruction>(RootNode->Real);
-      ReductionInfo[RootInst].first->removeIncomingValue(BackEdge);
-      DeadInstrRoots.push_back(ReductionInfo[RootInst].second);
+      auto &Info = ReductionInfo[RootInst];
+      Info.first->removeIncomingValue(BackEdge);
+      DeadInstrRoots.push_back(Info.second);
     } else {
       assert(R && "Unable to find replacement for RootInstruction");
       DeadInstrRoots.push_back(RootInstruction);