rt: Stub Rust GC metadata printer and Rust GC strategy modules

src/rustllvm/RustGCStrategy.cpp

@@ -0,0 +1,34 @@
+//===- RustGCStrategy.cpp - Rust garbage collection strategy ----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the garbage collection strategy for Rust.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/CodeGen/GCs.h"
+#include "llvm/CodeGen/GCStrategy.h"
+
+using namespace llvm;
+
+namespace {
+  class RustGCStrategy : public GCStrategy {
+  public:
+    RustGCStrategy();
+  };
+}
+
+static GCRegistry::Add<RustGCStrategy>
+X("rust", "Rust GC");
+
+RustGCStrategy::RustGCStrategy() {
+  NeededSafePoints = 1 << GC::PostCall;
+  UsesMetadata = true;
+}
+
+