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[llvm-profgen] Avoid repeated hash lookups (NFC) #127028

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Merged
kazutakahirata merged 1 commit into from
Feb 13, 2025
Merged

[llvm-profgen] Avoid repeated hash lookups (NFC) #127028

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7 changes: 4 additions & 3 deletions llvm/tools/llvm-profgen/MissingFrameInferrer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -238,12 +238,13 @@ bool MissingFrameInferrer::inferMissingFrames(
return false;

// Bail out if caller has no known outgoing call edges.
if (!CallEdgesF.count(From))
auto It = CallEdgesF.find(From);
if (It == CallEdgesF.end())
return false;

// Done with the inference if the calle is reachable via a single callsite.
// This may not be accurate but it improves the search throughput.
if (llvm::is_contained(CallEdgesF[From], ToFRange->Func))
if (llvm::is_contained(It->second, ToFRange->Func))
return true;

// Bail out if callee is not tailcall reachable at all.
Expand All @@ -253,7 +254,7 @@ bool MissingFrameInferrer::inferMissingFrames(
Visiting.clear();
CurSearchingDepth = 0;
uint64_t NumPaths = 0;
for (auto Target : CallEdgesF[From]) {
for (auto Target : It->second) {
NumPaths +=
computeUniqueTailCallPath(Target, ToFRange->Func, UniquePath);
// Stop analyzing the remaining if we are already seeing more than one
Expand Down