cpp11-migrate: Refactor for driver model of operation

Re-commit of r189691 and r189689 now with a proper autoconf fix.

Massive simplification of how replacements and file overrides are
handled by the migrator:
* Sources and headers are all treated the same.
* All replacements for a given translation unit are stored in the same
  TranslationUnitReplacements structure.
* Change tracking is updated only from main file; no need for
  propagating "is tracking" flag around.
* Transform base class no longer responsible for applying replacements.
  They are simply stored and main() looks after deduplication and
  application.
* Renamed -yaml-only to -serialize-replacements. Same restrictions apply:
  Can only request one transform. New restriction: formatting cannot also
  be turned on since it's basically a transform.
* If -serialize-replacements is requested, changes to files will not be
  applied on disk.
* Changed behaviour of function generating names for serialized
  replacements: Only the main source file goes into the name of the file
  since a file may contain changes for multiple different files.
* Updated HeaderReplacements LIT test for new serialization behaviour.
  * Replaced old test that ensures replacements are not serialized if
    -serialize-replacements is not provided. New version ensures changes
    are made directly to all files in the translation unit.
* Updated unit tests.
  * Due to major simplification of structures in FileOverrides.h, the
    FileOverridesTest is quite a bit simpler now.

llvm-svn: 189798

1 files changed, 2 insertions, 2 deletions

diff --git a/clang-tools-extra/unittests/cpp11-migrate/TransformTest.cpp b/clang-tools-extra/unittests/cpp11-migrate/TransformTest.cpp
index b8efc9b5840..75397bf7760 100644
--- a/clang-tools-extra/unittests/cpp11-migrate/TransformTest.cpp
+++ b/clang-tools-extra/unittests/cpp11-migrate/TransformTest.cpp
@@ -26,7 +26,7 @@ public:
   DummyTransform(llvm::StringRef Name, const TransformOptions &Options)
       : Transform(Name, Options) {}
 
-  virtual int apply(FileOverrides &,
+  virtual int apply(const FileOverrides &,
                     const tooling::CompilationDatabase &,
                     const std::vector<std::string> &) { return 0; }
 
@@ -161,7 +161,7 @@ TEST(Transform, Timings) {
 
   // Transform's handle* functions require FileOverrides to be set, even if
   // there aren't any.
-  FileOverrides Overrides(/*TrackFileChanges=*/false);
+  FileOverrides Overrides;
   T.setOverrides(Overrides);
 
   Tool.run(clang::tooling::newFrontendActionFactory(&Factory, &Callbacks));