[llvm] [TableGen] Avoid repeated hash lookups (NFC) (PR #107710)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/107710

None

>From 7ca0cf78800a5141acdb57d1afc67af4607cfa4f Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sat, 7 Sep 2024 08:56:30 -0700
Subject: [PATCH] [TableGen] Avoid repeated hash lookups (NFC)

---
 llvm/utils/TableGen/DXILEmitter.cpp | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/llvm/utils/TableGen/DXILEmitter.cpp b/llvm/utils/TableGen/DXILEmitter.cpp
index 9cc1b5ccb8acb9..39b4a3ac375ed6 100644
--- a/llvm/utils/TableGen/DXILEmitter.cpp
+++ b/llvm/utils/TableGen/DXILEmitter.cpp
@@ -402,10 +402,8 @@ static void emitDXILOperationTable(std::vector<DXILOperationDesc> &Ops,
   for (auto &Op : Ops) {
     OpStrings.add(Op.OpName);
 
-    if (ClassSet.contains(Op.OpClass))
-      continue;
-    ClassSet.insert(Op.OpClass);
-    OpClassStrings.add(Op.OpClass.data());
+    if (ClassSet.insert(Op.OpClass).second)
+      OpClassStrings.add(Op.OpClass.data());
   }
 
   // Layout names.