1 files changed, 4 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index efacc35d149..675b5eb07c5 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -2224,8 +2224,12 @@ llvm::DIModule *CGDebugInfo::getParentModuleOrNull(const Decl *D) {
     // option.
     FullSourceLoc Loc(D->getLocation(), CGM.getContext().getSourceManager());
     if (Module *M = ClangModuleMap->inferModuleFromLocation(Loc)) {
+      // This is a (sub-)module.
       auto Info = ExternalASTSource::ASTSourceDescriptor(*M);
       return getOrCreateModuleRef(Info, /*SkeletonCU=*/false);
+    } else {
+      // This the precompiled header being built.
+      return getOrCreateModuleRef(PCHDescriptor, /*SkeletonCU=*/false);
     }
   }