[clang-rename] Fix handling of unchanged files

Fix the output of clang-rename for the files without modifications.
Update the code in clang-reorder-fields/tool/ClangReorderFields.cpp 
to avoid inconsistency.

Example:
a.h:
struct A {};
a.cpp:
#include "a.h"
int main() { return 0; }

Before the changes the output looks like this:
clang-rename -qualified-name=A -new-name=B a.cpp
<<<<<INVALID SOURCE LOCATION>>>>>

Test plan: make -j8 check-clang-tools

Differential revision: https://reviews.llvm.org/D24634


git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@281826 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 7 deletions

diff --git a/clang-reorder-fields/tool/ClangReorderFields.cpp b/clang-reorder-fields/tool/ClangReorderFields.cpp
index 3061876c..077e55e8 100644
--- a/clang-reorder-fields/tool/ClangReorderFields.cpp
+++ b/clang-reorder-fields/tool/ClangReorderFields.cpp
@@ -80,13 +80,8 @@ int main(int argc, const char **argv) {
 
   for (const auto &File : Files) {
     const auto *Entry = FileMgr.getFile(File);
-    const auto ID = Sources.translateFile(Entry);
-    // The method Rewriter::getRewriteBufferFor returns nullptr if
-    // the file has not been changed.
-    if (const auto *RB = Rewrite.getRewriteBufferFor(ID))
-      RB->write(outs());
-    else
-      outs() << Sources.getMemoryBufferForFile(Entry)->getBuffer();
+    const auto ID = Sources.getOrCreateFileID(Entry, SrcMgr::C_User);
+    Rewrite.getEditBuffer(ID).write(outs());
   }
 
   return ExitCode;