[llvm] [Passes] Avoid repeated hash lookups (NFC) (PR #126404)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/126404

None

>From d94b62a4a55933c2b47aea1e24927b29c46cdb01 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sat, 8 Feb 2025 14:37:43 -0800
Subject: [PATCH] [Passes] Avoid repeated hash lookups (NFC)

---
 llvm/include/llvm/Passes/DroppedVariableStats.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/llvm/include/llvm/Passes/DroppedVariableStats.h b/llvm/include/llvm/Passes/DroppedVariableStats.h
index e2e91891e24c19e..30fbeae703b03bc 100644
--- a/llvm/include/llvm/Passes/DroppedVariableStats.h
+++ b/llvm/include/llvm/Passes/DroppedVariableStats.h
@@ -96,9 +96,10 @@ class DroppedVariableStats {
     DenseSet<VarID> &DebugVariablesBeforeSet =
         DbgVariables.DebugVariablesBefore;
     DenseSet<VarID> &DebugVariablesAfterSet = DbgVariables.DebugVariablesAfter;
-    if (InlinedAts.back().find(FuncName) == InlinedAts.back().end())
+    auto It = InlinedAts.back().find(FuncName);
+    if (It == InlinedAts.back().end())
       return;
-    DenseMap<VarID, DILocation *> &InlinedAtsMap = InlinedAts.back()[FuncName];
+    DenseMap<VarID, DILocation *> &InlinedAtsMap = It->second;
     // Find an Instruction that shares the same scope as the dropped #dbg_value
     // or has a scope that is the child of the scope of the #dbg_value, and has
     // an inlinedAt equal to the inlinedAt of the #dbg_value or it's inlinedAt