[llvm] [Transforms] Avoid repeated hash lookups (NFC) (PR #113120)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/113120

None

>From b4f42c8cdf2b9e288f86df9c0a0d5035e0a7279f Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sun, 20 Oct 2024 12:08:46 -0700
Subject: [PATCH] [Transforms] Avoid repeated hash lookups (NFC)

---
 llvm/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/llvm/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp b/llvm/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp
index e323b391179ee0..eaf58ea8dd9d06 100644
--- a/llvm/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp
+++ b/llvm/lib/Transforms/Scalar/LowerMatrixIntrinsics.cpp
@@ -1462,9 +1462,12 @@ class LowerMatrixIntrinsics {
       if (!CanBeFlattened(Op))
         return;
 
-      if (match(Op, m_BinOp()) && ShapeMap.find(Op) != ShapeMap.end()) {
-        ShapeMap[Op] = ShapeMap[Op].t();
-        return;
+      if (match(Op, m_BinOp())) {
+        auto It = ShapeMap.find(Op);
+        if (It != ShapeMap.end()) {
+          It->second = It->second.t();
+          return;
+        }
       }
 
       FusedInsts.insert(cast<Instruction>(Op));