From c322d328aa331639f647711aee44c5dddfadd337 Mon Sep 17 00:00:00 2001
From: Ben Langmuir <blangmuir@apple.com>
Date: Tue, 31 Mar 2020 15:23:01 -0700
Subject: [PATCH] Forward WrapperFrontendAction::shouldEraseOutputFiles()

Per the documentation, this class is supposed to forward every virtual
method, but we had missed on (shouldEraseOutputFiles). This fixes using
a wrapped frontend action over the PCH generator when using
-fallow-pch-with-compiler-errors. I do not think any upstream wrapper
actions can test this.

Differential Revision: https://reviews.llvm.org/D77180

rdar://61110294
---
 clang/include/clang/Frontend/FrontendAction.h | 1 +
 clang/lib/Frontend/FrontendAction.cpp         | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/clang/include/clang/Frontend/FrontendAction.h b/clang/include/clang/Frontend/FrontendAction.h
index e994e24cf5af..c9f9f080c141 100644
--- a/clang/include/clang/Frontend/FrontendAction.h
+++ b/clang/include/clang/Frontend/FrontendAction.h
@@ -312,6 +312,7 @@ protected:
   bool BeginSourceFileAction(CompilerInstance &CI) override;
   void ExecuteAction() override;
   void EndSourceFileAction() override;
+  bool shouldEraseOutputFiles() override;
 
 public:
   /// Construct a WrapperFrontendAction from an existing action, taking
diff --git a/clang/lib/Frontend/FrontendAction.cpp b/clang/lib/Frontend/FrontendAction.cpp
index 1dc85d967ca0..0155238dd0a8 100644
--- a/clang/lib/Frontend/FrontendAction.cpp
+++ b/clang/lib/Frontend/FrontendAction.cpp
@@ -1081,6 +1081,9 @@ void WrapperFrontendAction::ExecuteAction() {
 void WrapperFrontendAction::EndSourceFileAction() {
   WrappedAction->EndSourceFileAction();
 }
+bool WrapperFrontendAction::shouldEraseOutputFiles() {
+  return WrappedAction->shouldEraseOutputFiles();
+}
 
 bool WrapperFrontendAction::usesPreprocessorOnly() const {
   return WrappedAction->usesPreprocessorOnly();