[clang] [Analysis] Avoid repeated hash lookups (NFC) (PR #126378)

[Kazu Hirata via cfe-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/126378

None

>From f36d21e31c863829cfe49ac21093795500733e64 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sat, 8 Feb 2025 00:53:38 -0800
Subject: [PATCH] [Analysis] Avoid repeated hash lookups (NFC)

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

diff --git a/clang/lib/Analysis/UninitializedValues.cpp b/clang/lib/Analysis/UninitializedValues.cpp
index bf2f7306186507e..3a052eb27a444f4 100644
--- a/clang/lib/Analysis/UninitializedValues.cpp
+++ b/clang/lib/Analysis/UninitializedValues.cpp
@@ -379,8 +379,10 @@ void ClassifyRefs::classify(const Expr *E, Class C) {
   }
 
   FindVarResult Var = findVar(E, DC);
-  if (const DeclRefExpr *DRE = Var.getDeclRefExpr())
-    Classification[DRE] = std::max(Classification[DRE], C);
+  if (const DeclRefExpr *DRE = Var.getDeclRefExpr()) {
+    auto &Class = Classification[DRE];
+    Class = std::max(Class, C);
+  }
 }
 
 void ClassifyRefs::VisitDeclStmt(DeclStmt *DS) {