Plugin support for llvmc2 (a-la opt).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56465 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvmc2/Plugin.cpp b/tools/llvmc2/Plugin.cpp
new file mode 100644
index 0000000..70d9987
--- /dev/null
+++ b/tools/llvmc2/Plugin.cpp
@@ -0,0 +1,41 @@
+//===--- Plugin.cpp - The LLVM Compiler Driver ------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open
+// Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  Plugin support for llvmc2.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Plugin.h"
+
+#include <vector>
+
+namespace {
+  typedef std::vector<llvmc::BasePlugin*> PluginRegistry;
+  static PluginRegistry GlobalPluginRegistry;
+}
+
+namespace llvmc {
+
+  RegisterPluginImpl::RegisterPluginImpl(BasePlugin* plugin) {
+    GlobalPluginRegistry.push_back(plugin);
+  }
+
+  void PopulateLanguageMap(LanguageMap& langMap) {
+    for (PluginRegistry::const_iterator B = GlobalPluginRegistry.begin(),
+           E = GlobalPluginRegistry.end(); B != E; ++B)
+      (*B)->PopulateLanguageMap(langMap);
+  }
+
+  void PopulateCompilationGraph(CompilationGraph& graph) {
+    for (PluginRegistry::const_iterator B = GlobalPluginRegistry.begin(),
+           E = GlobalPluginRegistry.end(); B != E; ++B)
+      (*B)->PopulateCompilationGraph(graph);
+  }
+
+}