1 files changed, 13 insertions, 0 deletions
diff --git a/clang/lib/CIR/CodeGen/CIRGenModule.cpp b/clang/lib/CIR/CodeGen/CIRGenModule.cpp
index eef23a0..c977ff9 100644
--- a/clang/lib/CIR/CodeGen/CIRGenModule.cpp
+++ b/clang/lib/CIR/CodeGen/CIRGenModule.cpp
@@ -119,6 +119,19 @@ CIRGenModule::CIRGenModule(mlir::MLIRContext &mlirContext,
                        cir::OptInfoAttr::get(&mlirContext,
                                              cgo.OptimizationLevel,
                                              cgo.OptimizeSize));
+  // Set the module name to be the name of the main file. TranslationUnitDecl
+  // often contains invalid source locations and isn't a reliable source for the
+  // module location.
+  FileID mainFileId = astContext.getSourceManager().getMainFileID();
+  const FileEntry &mainFile =
+      *astContext.getSourceManager().getFileEntryForID(mainFileId);
+  StringRef path = mainFile.tryGetRealPathName();
+  if (!path.empty()) {
+    theModule.setSymName(path);
+    theModule->setLoc(mlir::FileLineColLoc::get(&mlirContext, path,
+                                                /*line=*/0,
+                                                /*column=*/0));
+  }
 }
 
 CIRGenModule::~CIRGenModule() = default;