Thread Safety Analysis: Use replaceLock instead of removeLock+addLock #141500
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In ScopedLockableFactEntry::unlock(), we can avoid a second search, pop_back(), and push_back() if we use the already obtained iterator into the FactSet to replace the old FactEntry and take its position in the vector.
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@llvm/pr-subscribers-clang Author: Marco Elver (melver) ChangesIn ScopedLockableFactEntry::unlock(), we can avoid a second search, pop_back(), and push_back() if we use the already obtained iterator into the FactSet to replace the old FactEntry and take its position in the vector. Full diff: https://github.com/llvm/llvm-project/pull/141500.diff 1 Files Affected:
diff --git a/clang/lib/Analysis/ThreadSafety.cpp b/clang/lib/Analysis/ThreadSafety.cpp
index 198e324414be9..9dffb8fcd2204 100644
--- a/clang/lib/Analysis/ThreadSafety.cpp
+++ b/clang/lib/Analysis/ThreadSafety.cpp
@@ -1071,9 +1071,9 @@ class ScopedLockableFactEntry : public FactEntry {
return;
}
- FSet.removeLock(FactMan, Cp);
- FSet.addLock(FactMan,
- std::make_unique<LockableFactEntry>(!Cp, LK_Exclusive, loc));
+ FSet.replaceLock(
+ FactMan, It,
+ std::make_unique<LockableFactEntry>(!Cp, LK_Exclusive, loc));
} else if (Handler) {
SourceLocation PrevLoc;
if (const FactEntry *Neg = FSet.findLock(FactMan, !Cp))
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Member
|
@llvm/pr-subscribers-clang-analysis Author: Marco Elver (melver) ChangesIn ScopedLockableFactEntry::unlock(), we can avoid a second search, pop_back(), and push_back() if we use the already obtained iterator into the FactSet to replace the old FactEntry and take its position in the vector. Full diff: https://github.com/llvm/llvm-project/pull/141500.diff 1 Files Affected:
diff --git a/clang/lib/Analysis/ThreadSafety.cpp b/clang/lib/Analysis/ThreadSafety.cpp
index 198e324414be9..9dffb8fcd2204 100644
--- a/clang/lib/Analysis/ThreadSafety.cpp
+++ b/clang/lib/Analysis/ThreadSafety.cpp
@@ -1071,9 +1071,9 @@ class ScopedLockableFactEntry : public FactEntry {
return;
}
- FSet.removeLock(FactMan, Cp);
- FSet.addLock(FactMan,
- std::make_unique<LockableFactEntry>(!Cp, LK_Exclusive, loc));
+ FSet.replaceLock(
+ FactMan, It,
+ std::make_unique<LockableFactEntry>(!Cp, LK_Exclusive, loc));
} else if (Handler) {
SourceLocation PrevLoc;
if (const FactEntry *Neg = FSet.findLock(FactMan, !Cp))
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AaronBallman
approved these changes
Jun 5, 2025
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AaronBallman
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AaronBallman
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LGTM, nice improvement!
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In ScopedLockableFactEntry::unlock(), we can avoid a second search, pop_back(), and push_back() if we use the already obtained iterator into the FactSet to replace the old FactEntry and take its position in the vector.