[llvm] [Transforms] Avoid repeated hash lookups (NFC) (PR #130708)

[Nikita Popov via llvm-commits]

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@@ -148,7 +148,8 @@ void PseudoProbeVerifier::verifyProbeFactors(
   auto &PrevProbeFactors = FunctionProbeFactors[F->getName()];
   for (const auto &I : ProbeFactors) {
     float CurProbeFactor = I.second;
-    if (PrevProbeFactors.count(I.first)) {
+    auto [It, Inserted] = PrevProbeFactors.try_emplace(I.first);
+    if (!Inserted) {
       float PrevProbeFactor = PrevProbeFactors[I.first];
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nikic wrote:

Another use here?

https://github.com/llvm/llvm-project/pull/130708