[clang][Sema] Optimize ~SemaDiagnosticBuilder #142252
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Call getDiagnosticLevel(), which is expensive, only if ShowCallStack is set. Small gains: https://llvm-compile-time-tracker.com/compare.php?from=843e362318e884991e517a54446b4faeacdad789&to=5cef0c18466318a426924b3c45f7abaaa8f6b535&stat=instructions:u
llvmbot
added
clang
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@llvm/pr-subscribers-clang Author: Timm Baeder (tbaederr) ChangesCall getDiagnosticLevel(), which is expensive, only if ShowCallStack is set. Full diff: https://github.com/llvm/llvm-project/pull/142252.diff 1 Files Affected:
diff --git a/clang/lib/Sema/Sema.cpp b/clang/lib/Sema/Sema.cpp
index 1901d19b14dfc..ff4c0d833e573 100644
--- a/clang/lib/Sema/Sema.cpp
+++ b/clang/lib/Sema/Sema.cpp
@@ -2062,11 +2062,14 @@ Sema::SemaDiagnosticBuilder::~SemaDiagnosticBuilder() {
if (ImmediateDiag) {
// Emit our diagnostic and, if it was a warning or error, output a callstack
// if Fn isn't a priori known-emitted.
- bool IsWarningOrError = S.getDiagnostics().getDiagnosticLevel(
- DiagID, Loc) >= DiagnosticsEngine::Warning;
ImmediateDiag.reset(); // Emit the immediate diag.
- if (IsWarningOrError && ShowCallStack)
- emitCallStackNotes(S, Fn);
+
+ if (ShowCallStack) {
+ bool IsWarningOrError = S.getDiagnostics().getDiagnosticLevel(
+ DiagID, Loc) >= DiagnosticsEngine::Warning;
+ if (IsWarningOrError)
+ emitCallStackNotes(S, Fn);
+ }
} else {
assert((!PartialDiagId || ShowCallStack) &&
"Must always show call stack for deferred diags.");
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The original code looks like the ordering with the |
cor3ntin
approved these changes
May 31, 2025
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LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/45/builds/12825 Here is the relevant piece of the build log for the reference |
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LLVM Buildbot has detected a new failure on builder Full details are available at: https://lab.llvm.org/buildbot/#/builders/132/builds/1299 Here is the relevant piece of the build log for the reference |
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Call getDiagnosticLevel(), which is expensive, only if ShowCallStack is set.
Small gains:
https://llvm-compile-time-tracker.com/compare.php?from=843e362318e884991e517a54446b4faeacdad789&to=5cef0c18466318a426924b3c45f7abaaa8f6b535&stat=instructions:u