Add pluggable action support to clang-cc, via -plugin command line option.

 - Expects the plugin has been loaded with -load.

 - Using this may require disabling TOOL_NO_EXPORTS in the clang-cc Makefile, this breaks the llvm::Registry way of working (static constructors are bad, kids). This should be replaced with a "real" plugin model that has explicit plugin interfaces.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88824 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 28 insertions, 0 deletions

diff --git a/include/clang/Frontend/FrontendOptions.h b/include/clang/Frontend/FrontendOptions.h
index adb591ee06..67656067fc 100644
--- a/include/clang/Frontend/FrontendOptions.h
+++ b/include/clang/Frontend/FrontendOptions.h
@@ -39,6 +39,7 @@ namespace frontend {
     ParseNoop,              ///< Parse with noop callbacks.
     ParsePrintCallbacks,    ///< Parse and print each callback.
     ParseSyntaxOnly,        ///< Parse and perform semantic analysis.
+    PluginAction,           ///< Run a plugin action, \see ActionName.
     PrintDeclContext,       ///< Print DeclContext and their Decls.
     PrintPreprocessedInput, ///< -E mode.
     RewriteBlocks,          ///< ObjC->C Rewriter for Blocks.
@@ -109,12 +110,16 @@ public:
   /// The frontend action to perform.
   frontend::ActionKind ProgramAction;
 
+  /// The name of the action to run when using a plugin action.
+  std::string ActionName;
+
 public:
   FrontendOptions() {
     DebugCodeCompletionPrinter = 0;
     DisableFree = 0;
     EmptyInputOnly = 0;
     ProgramAction = frontend::ParseSyntaxOnly;
+    ActionName = "";
     RelocatablePCH = 0;
     ShowMacrosInCodeCompletion = 0;
     ShowStats = 0;
diff --git a/include/clang/Frontend/FrontendPluginRegistry.h b/include/clang/Frontend/FrontendPluginRegistry.h
new file mode 100644
index 0000000000..8341492cfd
--- /dev/null
+++ b/include/clang/Frontend/FrontendPluginRegistry.h
@@ -0,0 +1,23 @@
+//===-- FrontendAction.h - Pluggable Frontend Action Interface --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_FRONTEND_PLUGINFRONTENDACTION_H
+#define LLVM_CLANG_FRONTEND_PLUGINFRONTENDACTION_H
+
+#include "clang/Frontend/FrontendAction.h"
+#include "llvm/Support/Registry.h"
+
+namespace clang {
+
+/// The frontend plugin registry.
+typedef llvm::Registry<FrontendAction> FrontendPluginRegistry;
+
+} // end namespace clang
+
+#endif