[llvm] [CodeGen] Avoid repeated hash lookups (NFC) (PR #110074)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/110074

None

>From 0a38f82d1ddeb6df09d971feafd79bd6cc7b9f26 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Wed, 25 Sep 2024 06:40:01 -0700
Subject: [PATCH] [CodeGen] Avoid repeated hash lookups (NFC)

---
 llvm/lib/CodeGen/MIRVRegNamerUtils.cpp | 2 --
 1 file changed, 2 deletions(-)

diff --git a/llvm/lib/CodeGen/MIRVRegNamerUtils.cpp b/llvm/lib/CodeGen/MIRVRegNamerUtils.cpp
index ccfc4565d3a9bc..49c8a0e4663378 100644
--- a/llvm/lib/CodeGen/MIRVRegNamerUtils.cpp
+++ b/llvm/lib/CodeGen/MIRVRegNamerUtils.cpp
@@ -39,8 +39,6 @@ VRegRenamer::getVRegRenameMap(const std::vector<NamedVReg> &VRegs) {
   StringMap<unsigned> VRegNameCollisionMap;
 
   auto GetUniqueVRegName = [&VRegNameCollisionMap](const NamedVReg &Reg) {
-    if (!VRegNameCollisionMap.contains(Reg.getName()))
-      VRegNameCollisionMap[Reg.getName()] = 0;
     const unsigned Counter = ++VRegNameCollisionMap[Reg.getName()];
     return Reg.getName() + "__" + std::to_string(Counter);
   };