[fixit] Use overwriteChangedFiles() to deal with Windows mapped files

Fixes one instance of PR17960.

llvm-svn: 239920

1 files changed, 3 insertions, 2 deletions

diff --git a/clang/lib/Frontend/Rewrite/FrontendActions.cpp b/clang/lib/Frontend/Rewrite/FrontendActions.cpp
index 1b5eb28..dbc661b 100644
--- a/clang/lib/Frontend/Rewrite/FrontendActions.cpp
+++ b/clang/lib/Frontend/Rewrite/FrontendActions.cpp
@@ -48,9 +48,10 @@ FixItAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
 namespace {
 class FixItRewriteInPlace : public FixItOptions {
 public:
+  FixItRewriteInPlace() { InPlace = true; }
+
   std::string RewriteFilename(const std::string &Filename, int &fd) override {
-    fd = -1;
-    return Filename;
+    llvm_unreachable("don't call RewriteFilename for inplace rewrites");
   }
 };