Add a CC1 option -verify-pch

This option will:
- load the given pch file
- verify it is not out of date by stat'ing dependencies, and
- return 0 on success and non-zero on error

llvm-svn: 200884

1 files changed, 13 insertions, 0 deletions

diff --git a/clang/lib/Frontend/FrontendActions.cpp b/clang/lib/Frontend/FrontendActions.cpp
index 0d78bf032e3..8b174605ffd 100644
--- a/clang/lib/Frontend/FrontendActions.cpp
+++ b/clang/lib/Frontend/FrontendActions.cpp
@@ -320,6 +320,19 @@ ASTConsumer *DumpModuleInfoAction::CreateASTConsumer(CompilerInstance &CI,
   return new ASTConsumer();
 }
 
+ASTConsumer *VerifyPCHAction::CreateASTConsumer(CompilerInstance &CI,
+                                                StringRef InFile) {
+  return new ASTConsumer();
+}
+
+void VerifyPCHAction::ExecuteAction() {
+  getCompilerInstance().
+    createPCHExternalASTSource(getCurrentFile(), /*DisablePCHValidation*/false,
+                               /*AllowPCHWithCompilerErrors*/false,
+                               /*AllowConfigurationMismatch*/true,
+                               /*DeserializationListener*/0);
+}
+
 namespace {
   /// \brief AST reader listener that dumps module information for a module
   /// file.