[clang] clang: Remove copy of string into temporary set (PR #196373)

[Matt Arsenault via cfe-commits]

https://github.com/arsenm created https://github.com/llvm/llvm-project/pull/196373

None

>From 5d4213d44b8da672d2fd1809066e4bb11471fbf7 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault at amd.com>
Date: Thu, 7 May 2026 18:14:53 +0100
Subject: [PATCH] clang: Remove copy of string into temporary set

---
 clang/lib/Driver/ToolChains/AMDGPU.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/clang/lib/Driver/ToolChains/AMDGPU.cpp b/clang/lib/Driver/ToolChains/AMDGPU.cpp
index 3a1e82ec01b74..b457ee2cde1c3 100644
--- a/clang/lib/Driver/ToolChains/AMDGPU.cpp
+++ b/clang/lib/Driver/ToolChains/AMDGPU.cpp
@@ -739,7 +739,8 @@ AMDGPUToolChain::TranslateArgs(const DerivedArgList &Args, StringRef BoundArch,
           << getArchName() << llvm::toString(GPUsOrErr.takeError()) << "-mcpu";
     } else {
       auto &GPUs = *GPUsOrErr;
-      if (llvm::SmallSet<std::string, 1>(GPUs.begin(), GPUs.end()).size() > 1)
+      if (llvm::SmallSet<llvm::StringRef, 1>(GPUs.begin(), GPUs.end()).size() >
+          1)
         getDriver().Diag(diag::warn_drv_multi_gpu_arch)
             << getArchName() << llvm::join(GPUs, ", ") << "-mcpu";
       DAL->AddJoinedArg(nullptr, Opts.getOption(options::OPT_mcpu_EQ),