cpp11-migrate: Register the transforms automatically using llvm::Registry

With this change each transform now register a factory. The factories are
registered using an llvm::Registry which makes them available globally.

llvm-svn: 187041

1 files changed, 14 insertions, 0 deletions

diff --git a/clang-tools-extra/cpp11-migrate/LoopConvert/LoopConvert.cpp b/clang-tools-extra/cpp11-migrate/LoopConvert/LoopConvert.cpp
index cffc188bce1..965ae4b25d0 100644
--- a/clang-tools-extra/cpp11-migrate/LoopConvert/LoopConvert.cpp
+++ b/clang-tools-extra/cpp11-migrate/LoopConvert/LoopConvert.cpp
@@ -66,3 +66,17 @@ int LoopConvertTransform::apply(FileOverrides &InputStates,
 
   return 0;
 }
+
+struct LoopConvertFactory : TransformFactory {
+  Transform *createTransform(const TransformOptions &Opts) LLVM_OVERRIDE {
+    return new LoopConvertTransform(Opts);
+  }
+};
+
+// Register the factory using this statically initialized variable.
+static TransformFactoryRegistry::Add<LoopConvertFactory>
+X("loop-convert", "Make use of range-based for loops where possible");
+
+// This anchor is used to force the linker to link in the generated object file
+// and thus register the factory.
+volatile int LoopConvertTransformAnchorSource = 0;