[llvm] [llvm-profgen] Avoid repeated hash lookups (NFC) (PR #130466)

[Kazu Hirata via llvm-commits]

https://github.com/kazutakahirata created https://github.com/llvm/llvm-project/pull/130466

None

>From ad6785fc3e6a2f782d0d892678be1cde5cedeb88 Mon Sep 17 00:00:00 2001
From: Kazu Hirata <kazu at google.com>
Date: Sat, 8 Mar 2025 01:05:23 -0800
Subject: [PATCH] [llvm-profgen] Avoid repeated hash lookups (NFC)

---
 llvm/tools/llvm-profgen/MissingFrameInferrer.cpp | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/llvm/tools/llvm-profgen/MissingFrameInferrer.cpp b/llvm/tools/llvm-profgen/MissingFrameInferrer.cpp
index ac88fced9159c..edfe8979c7121 100644
--- a/llvm/tools/llvm-profgen/MissingFrameInferrer.cpp
+++ b/llvm/tools/llvm-profgen/MissingFrameInferrer.cpp
@@ -165,14 +165,14 @@ uint64_t MissingFrameInferrer::computeUniqueTailCallPath(
   if (CurSearchingDepth == MaximumSearchDepth)
     return 0;
 
-
-  if (!FuncToTailCallMap.count(From))
+  auto It = FuncToTailCallMap.find(From);
+  if (It == FuncToTailCallMap.end())
     return 0;
 
   CurSearchingDepth++;
   Visiting.insert(From);
   uint64_t NumPaths = 0;
-  for (auto TailCall : FuncToTailCallMap[From]) {
+  for (auto TailCall : It->second) {
     NumPaths += computeUniqueTailCallPath(TailCall, To, Path);
     // Stop analyzing the remaining if we are already seeing more than one
     // reachable paths.