[clang-tools-extra] [clangd] Avoid round-trip from SourceLocation to clangd::Range and back in SymbolCollector::handleMacros() (PR #127757)

[Nathan Ridge via cfe-commits]

https://github.com/HighCommander4 created 
https://github.com/llvm/llvm-project/pull/127757

…

>From d7f83b154b17856b1de2d97cf0a3aca72dd0379c Mon Sep 17 00:00:00 2001
From: Nathan Ridge <zeratul...@hotmail.com>
Date: Wed, 19 Feb 2025 02:25:16 -0500
Subject: [PATCH] [clangd] Avoid round-trip from SourceLocation to
 clangd::Range and back in SymbolCollector::handleMacros()

---
 clang-tools-extra/clangd/CollectMacros.cpp         | 9 ++++++---
 clang-tools-extra/clangd/CollectMacros.h           | 1 +
 clang-tools-extra/clangd/index/SymbolCollector.cpp | 7 +++----
 3 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/clang-tools-extra/clangd/CollectMacros.cpp 
b/clang-tools-extra/clangd/CollectMacros.cpp
index 96298ee3ea50a..1e7d765f0b6f1 100644
--- a/clang-tools-extra/clangd/CollectMacros.cpp
+++ b/clang-tools-extra/clangd/CollectMacros.cpp
@@ -18,10 +18,13 @@
 namespace clang {
 namespace clangd {
 
-Range MacroOccurrence::toRange(const SourceManager &SM) const {
+CharSourceRange MacroOccurrence::toSourceRange(const SourceManager &SM) const {
   auto MainFile = SM.getMainFileID();
-  return halfOpenToRange(
-      SM, syntax::FileRange(MainFile, StartOffset, EndOffset).toCharRange(SM));
+  return syntax::FileRange(MainFile, StartOffset, EndOffset).toCharRange(SM);
+}
+
+Range MacroOccurrence::toRange(const SourceManager &SM) const {
+  return halfOpenToRange(SM, toSourceRange(SM));
 }
 
 void CollectMainFileMacros::add(const Token &MacroNameTok, const MacroInfo *MI,
diff --git a/clang-tools-extra/clangd/CollectMacros.h 
b/clang-tools-extra/clangd/CollectMacros.h
index e7198641d8d53..20a3fc24d759c 100644
--- a/clang-tools-extra/clangd/CollectMacros.h
+++ b/clang-tools-extra/clangd/CollectMacros.h
@@ -31,6 +31,7 @@ struct MacroOccurrence {
   // True if the occurence is used in a conditional directive, e.g. #ifdef 
MACRO
   bool InConditionalDirective;
 
+  CharSourceRange toSourceRange(const SourceManager &SM) const;
   Range toRange(const SourceManager &SM) const;
 };
 
diff --git a/clang-tools-extra/clangd/index/SymbolCollector.cpp 
b/clang-tools-extra/clangd/index/SymbolCollector.cpp
index 1de7faf81746e..3f5633357073d 100644
--- a/clang-tools-extra/clangd/index/SymbolCollector.cpp
+++ b/clang-tools-extra/clangd/index/SymbolCollector.cpp
@@ -713,7 +713,8 @@ void SymbolCollector::handleMacros(const MainFileMacros 
&MacroRefsToIndex) {
   // Add macro references.
   for (const auto &IDToRefs : MacroRefsToIndex.MacroRefs) {
     for (const auto &MacroRef : IDToRefs.second) {
-      const auto &Range = MacroRef.toRange(SM);
+      const auto &SR = MacroRef.toSourceRange(SM);
+      auto Range = halfOpenToRange(SM, SR);
       bool IsDefinition = MacroRef.IsDefinition;
       Ref R;
       R.Location.Start.setLine(Range.start.line);
@@ -726,9 +727,7 @@ void SymbolCollector::handleMacros(const MainFileMacros 
&MacroRefsToIndex) {
       if (IsDefinition) {
         Symbol S;
         S.ID = IDToRefs.first;
-        auto StartLoc = cantFail(sourceLocationInMainFile(SM, Range.start));
-        auto EndLoc = cantFail(sourceLocationInMainFile(SM, Range.end));
-        S.Name = toSourceCode(SM, SourceRange(StartLoc, EndLoc));
+        S.Name = toSourceCode(SM, SR.getAsRange());
         S.SymInfo.Kind = index::SymbolKind::Macro;
         S.SymInfo.SubKind = index::SymbolSubKind::None;
         S.SymInfo.Properties = index::SymbolPropertySet();

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