[Frontend] Make sure WrapperFrontendAction updates CurrentInput after calling BeginSourceFileAction.

I don't have a test case to add unfortunately.

llvm-svn: 260937

1 files changed, 4 insertions, 1 deletions

diff --git a/clang/lib/Frontend/FrontendAction.cpp b/clang/lib/Frontend/FrontendAction.cpp
index a8166a647d5..cdaa18a7a31 100644
--- a/clang/lib/Frontend/FrontendAction.cpp
+++ b/clang/lib/Frontend/FrontendAction.cpp
@@ -559,7 +559,10 @@ bool WrapperFrontendAction::BeginSourceFileAction(CompilerInstance &CI,
                                                   StringRef Filename) {
   WrappedAction->setCurrentInput(getCurrentInput());
   WrappedAction->setCompilerInstance(&CI);
-  return WrappedAction->BeginSourceFileAction(CI, Filename);
+  auto Ret = WrappedAction->BeginSourceFileAction(CI, Filename);
+  // BeginSourceFileAction may change CurrentInput, e.g. during module builds.
+  setCurrentInput(WrappedAction->getCurrentInput());
+  return Ret;
 }
 void WrapperFrontendAction::ExecuteAction() {
   WrappedAction->ExecuteAction();