[llvm] 99d2b3b - [llvm-profgen] Avoid repeated hash lookups (NFC) (#130466)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-03-09T00:49:37-08:00
New Revision: 99d2b3b0aa138470822fa82d8659bbb0e6364784

URL: https://github.com/llvm/llvm-project/commit/99d2b3b0aa138470822fa82d8659bbb0e6364784
DIFF: https://github.com/llvm/llvm-project/commit/99d2b3b0aa138470822fa82d8659bbb0e6364784.diff

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

Added: 
    

Modified: 
    llvm/tools/llvm-profgen/MissingFrameInferrer.cpp

Removed: 
    


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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.