1 files changed, 38 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/IR/GCStrategy.cpp b/contrib/llvm-project/llvm/lib/IR/GCStrategy.cpp
new file mode 100644
index 000000000000..f3bc5b74f8fd
--- /dev/null
+++ b/contrib/llvm-project/llvm/lib/IR/GCStrategy.cpp
@@ -0,0 +1,38 @@
+//===- GCStrategy.cpp - Garbage Collector Description ---------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the policy object GCStrategy which describes the
+// behavior of a given garbage collector.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/IR/GCStrategy.h"
+
+using namespace llvm;
+
+LLVM_INSTANTIATE_REGISTRY(GCRegistry)
+
+GCStrategy::GCStrategy() = default;
+
+std::unique_ptr<GCStrategy> llvm::getGCStrategy(const StringRef Name) {
+  for (auto &S : GCRegistry::entries())
+    if (S.getName() == Name)
+      return S.instantiate();
+
+  if (GCRegistry::begin() == GCRegistry::end()) {
+    // In normal operation, the registry should not be empty.  There should
+    // be the builtin GCs if nothing else.  The most likely scenario here is
+    // that we got here without running the initializers used by the Registry
+    // itself and it's registration mechanism.
+    const std::string error =
+        std::string("unsupported GC: ") + Name.str() +
+        " (did you remember to link and initialize the library?)";
+    report_fatal_error(error);
+  } else
+    report_fatal_error(std::string("unsupported GC: ") + Name.str());
+}