[clang] [clang][Basic] Optimize getDiagnosticSeverity() (PR #141950)
via cfe-commits
cfe-commits at lists.llvm.org
Thu May 29 07:01:07 PDT 2025
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-clang
Author: Timm Baeder (tbaederr)
<details>
<summary>Changes</summary>
Try not to call getDiagInfo() as often and only do it if we really have to.
---
Full diff: https://github.com/llvm/llvm-project/pull/141950.diff
1 Files Affected:
- (modified) clang/lib/Basic/DiagnosticIDs.cpp (+21-15)
``````````diff
diff --git a/clang/lib/Basic/DiagnosticIDs.cpp b/clang/lib/Basic/DiagnosticIDs.cpp
index f01ff4df84e6a..ae1484519e812 100644
--- a/clang/lib/Basic/DiagnosticIDs.cpp
+++ b/clang/lib/Basic/DiagnosticIDs.cpp
@@ -543,26 +543,32 @@ DiagnosticIDs::getDiagnosticSeverity(unsigned DiagID, SourceLocation Loc,
return Result;
const auto &SM = Diag.getSourceManager();
-
- bool ShowInSystemHeader =
- IsCustomDiag
- ? CustomDiagInfo->getDescription(DiagID).ShouldShowInSystemHeader()
- : !GetDiagInfo(DiagID) || GetDiagInfo(DiagID)->WarnShowInSystemHeader;
-
// If we are in a system header, we ignore it. We look at the diagnostic class
// because we also want to ignore extensions and warnings in -Werror and
// -pedantic-errors modes, which *map* warnings/extensions to errors.
- if (State->SuppressSystemWarnings && !ShowInSystemHeader && Loc.isValid() &&
- SM.isInSystemHeader(SM.getExpansionLoc(Loc)))
- return diag::Severity::Ignored;
-
+ if (State->SuppressSystemWarnings && Loc.isValid() &&
+ SM.isInSystemHeader(SM.getExpansionLoc(Loc))) {
+ bool ShowInSystemHeader = false;
+ if (IsCustomDiag)
+ ShowInSystemHeader =
+ CustomDiagInfo->getDescription(DiagID).ShouldShowInSystemHeader();
+ else if (const StaticDiagInfoRec *Rec = GetDiagInfo(DiagID))
+ ShowInSystemHeader = Rec->WarnShowInSystemHeader;
+
+ if (!ShowInSystemHeader)
+ return diag::Severity::Ignored;
+ }
// We also ignore warnings due to system macros
- bool ShowInSystemMacro =
- !GetDiagInfo(DiagID) || GetDiagInfo(DiagID)->WarnShowInSystemMacro;
- if (State->SuppressSystemWarnings && !ShowInSystemMacro && Loc.isValid() &&
- SM.isInSystemMacro(Loc))
- return diag::Severity::Ignored;
+ if (State->SuppressSystemWarnings && Loc.isValid() &&
+ SM.isInSystemMacro(Loc)) {
+
+ bool ShowInSystemMacro = false;
+ if (const StaticDiagInfoRec *Rec = GetDiagInfo(DiagID))
+ ShowInSystemMacro = Rec->WarnShowInSystemMacro;
+ if (!ShowInSystemMacro)
+ return diag::Severity::Ignored;
+ }
// Clang-diagnostics pragmas always take precedence over suppression mapping.
if (!Mapping.isPragma() && Diag.isSuppressedViaMapping(DiagID, Loc))
return diag::Severity::Ignored;
``````````
</details>
https://github.com/llvm/llvm-project/pull/141950
More information about the cfe-commits
mailing list