[llvm] [CodeGen] Avoid repeated hash lookups (NFC) (PR #123016)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/123016

None

>From 7aaa8d3589900c3da9e1d019fa9c222a8d83cdfb Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Tue, 14 Jan 2025 15:48:58 -0800
Subject: [PATCH] [CodeGen] Avoid repeated hash lookups (NFC)

---
 llvm/lib/CodeGen/CodeGenPrepare.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp
index ba1b10ec8b9b1b..a3392b71109897 100644
--- a/llvm/lib/CodeGen/CodeGenPrepare.cpp
+++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp
@@ -7690,8 +7690,8 @@ bool CodeGenPrepare::tryToSinkFreeOperands(Instruction *I) {
     // sunk instruction uses, if it is part of a chain that has already been
     // sunk.
     Instruction *OldI = cast<Instruction>(U->getUser());
-    if (NewInstructions.count(OldI))
-      NewInstructions[OldI]->setOperand(U->getOperandNo(), NI);
+    if (auto It = NewInstructions.find(OldI); It != NewInstructions.end())
+      It->second->setOperand(U->getOperandNo(), NI);
     else
       U->set(NI);
     Changed = true;