[llvm] [SLP] Avoid repeated hash lookups (NFC) (PR #115428)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata updated https://github.com/llvm/llvm-project/pull/115428

>From f33fdbaf2403b64be05d31b6e9cefc030a94ce60 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Thu, 7 Nov 2024 21:21:21 -0800
Subject: [PATCH 1/2] [SLP] Avoid repeated hash lookups (NFC)

---
 llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
index b2f677fb84f983..782b5dc05f8791 100644
--- a/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
+++ b/llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
@@ -2241,10 +2241,9 @@ class BoUpSLP {
           HashMap[NumFreeOpsHash.Hash] = std::make_pair(1, Lane);
         } else if (NumFreeOpsHash.NumOfAPOs == Min &&
                    NumFreeOpsHash.NumOpsWithSameOpcodeParent == SameOpNumber) {
-          auto *It = HashMap.find(NumFreeOpsHash.Hash);
-          if (It == HashMap.end())
-            HashMap[NumFreeOpsHash.Hash] = std::make_pair(1, Lane);
-          else
+          auto [It, Inserted] =
+              HashMap.try_emplace(NumFreeOpsHash.Hash, 1, Lane);
+          if (!Inserted)
             ++It->second.first;
         }
       }

>From fef1b642af4f606dc8791a27bd25afea9982d056 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Fri, 8 Nov 2024 00:16:25 -0800
Subject: [PATCH 2/2] Trigger build