[llvm] [Analysis] Avoid repeated hash lookups (NFC) (PR #131066)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/131066

None

>From d8ee2b8ad69e47c600ccb1f9f12ee3e64ec40ad0 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Wed, 12 Mar 2025 09:00:45 -0700
Subject: [PATCH] [Analysis] Avoid repeated hash lookups (NFC)

---
 llvm/lib/Analysis/MemoryDependenceAnalysis.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp b/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
index dec5ee5361ca3..8550aaacb4fc9 100644
--- a/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
+++ b/llvm/lib/Analysis/MemoryDependenceAnalysis.cpp
@@ -1620,10 +1620,12 @@ void MemoryDependenceResults::removeInstruction(Instruction *RemInst) {
       assert(P.getPointer() != RemInst &&
              "Already removed NonLocalPointerDeps info for RemInst");
 
-      NonLocalDepInfo &NLPDI = NonLocalPointerDeps[P].NonLocalDeps;
+      auto &NLPD = NonLocalPointerDeps[P];
+
+      NonLocalDepInfo &NLPDI = NLPD.NonLocalDeps;
 
       // The cache is not valid for any specific block anymore.
-      NonLocalPointerDeps[P].Pair = BBSkipFirstBlockPair();
+      NLPD.Pair = BBSkipFirstBlockPair();
 
       // Update any entries for RemInst to use the instruction after it.
       for (auto &Entry : NLPDI) {