[llvm] [Hexagon] Avoid repeated hash lookups (NFC) (PR #129357)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/129357

None

>From ef6a4cd9de86802627943352567dac213b7b3d84 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Thu, 27 Feb 2025 23:08:03 -0800
Subject: [PATCH] [Hexagon] Avoid repeated hash lookups (NFC)

---
 llvm/lib/Target/Hexagon/HexagonCopyHoisting.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Target/Hexagon/HexagonCopyHoisting.cpp b/llvm/lib/Target/Hexagon/HexagonCopyHoisting.cpp
index 59c882bf37afa..7c18c524d2d64 100644
--- a/llvm/lib/Target/Hexagon/HexagonCopyHoisting.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonCopyHoisting.cpp
@@ -180,14 +180,15 @@ bool HexagonCopyHoisting::analyzeCopy(MachineBasicBlock *BB) {
     bool IsSafetoMove = true;
     for (MachineBasicBlock *SuccBB : BB->successors()) {
       auto &SuccBBCopyInst = CopyMIList[SuccBB->getNumber()];
-      if (!SuccBBCopyInst.count(Key)) {
+      auto It = SuccBBCopyInst.find(Key);
+      if (It == SuccBBCopyInst.end()) {
         // Same copy not present in this successor
         IsSafetoMove = false;
         break;
       }
       // If present, make sure that it's safe to pull this copy instruction
       // into the predecessor.
-      MachineInstr *SuccMI = SuccBBCopyInst[Key];
+      MachineInstr *SuccMI = It->second;
       if (!isSafetoMove(SuccMI)) {
         IsSafetoMove = false;
         break;