[TableGen] Avoid repeated hash lookups (NFC)

[kazutakahirata]

No description provided.

[llvmbot]

@llvm/pr-subscribers-backend-directx

Author: Kazu Hirata (kazutakahirata)

Changes

---

Full diff: https://github.com/llvm/llvm-project/pull/107710.diff

1 Files Affected:

• (modified) llvm/utils/TableGen/DXILEmitter.cpp (+2-4)

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.