[clang] 6c5f5c1 - [Clang][Modules] Fix -Wunused-variable (#196577)

[via cfe-commits]

Author: Aiden Grossman
Date: 2026-05-08T09:53:29-07:00
New Revision: 6c5f5c1bad824b9dc736bb9c167a065ca71dad69

URL: https://github.com/llvm/llvm-project/commit/6c5f5c1bad824b9dc736bb9c167a065ca71dad69
DIFF: https://github.com/llvm/llvm-project/commit/6c5f5c1bad824b9dc736bb9c167a065ca71dad69.diff

LOG: [Clang][Modules] Fix -Wunused-variable (#196577)

Mark some variables [[maybe_unused]] and inline others that do not have
side effects to avoid -Wunused-variable in non-assert builds.

Added: 
    

Modified: 
    clang/lib/Serialization/ASTReader.cpp

Removed: 
    


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diff  --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index 6b242f553c59d..dfd714dd53814 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -6327,7 +6327,8 @@ Module *ASTReader::getSubmodule(uint32_t GlobalID) {
   assert(It != GlobalSubmoduleMap.end());
   ModuleFile &F = *It->second;
   unsigned Index = GlobalID - F.BaseSubmoduleID - NUM_PREDEF_SUBMODULE_IDS;
-  unsigned LocalID = Index + F.LocalBaseSubmoduleID + NUM_PREDEF_SUBMODULE_IDS;
+  [[maybe_unused]] unsigned LocalID =
+      Index + F.LocalBaseSubmoduleID + NUM_PREDEF_SUBMODULE_IDS;
 
   BitstreamCursor &Cursor = F.SubmodulesCursor;
   SavedStreamPosition SavedPosition(Cursor);
@@ -6397,10 +6398,9 @@ Module *ASTReader::getSubmodule(uint32_t GlobalID) {
 
       StringRef Name = Blob;
       unsigned Idx = 0;
-      unsigned ReadLocalID = Record[Idx++];
+      [[maybe_unused]] unsigned ReadLocalID = Record[Idx++];
       assert(LocalID == ReadLocalID);
-      SubmoduleID ReadGlobalID = getGlobalSubmoduleID(F, ReadLocalID);
-      assert(GlobalID == ReadGlobalID);
+      assert(GlobalID == getGlobalSubmoduleID(F, ReadLocalID));
       SubmoduleID Parent = getGlobalSubmoduleID(F, Record[Idx++]);
       Module::ModuleKind Kind = (Module::ModuleKind)Record[Idx++];
       SourceLocation DefinitionLoc = ReadSourceLocation(F, Record[Idx++]);