1 files changed, 62 insertions, 0 deletions
diff --git a/include/llvm/IR/UseListOrder.h b/include/llvm/IR/UseListOrder.h
new file mode 100644
index 000000000000..5df459b1bd30
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+++ b/include/llvm/IR/UseListOrder.h
@@ -0,0 +1,62 @@
+//===- llvm/IR/UseListOrder.h - LLVM Use List Order -------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file has structures and command-line options for preserving use-list
+// order.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_IR_USELISTORDER_H
+#define LLVM_IR_USELISTORDER_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/SmallVector.h"
+#include <vector>
+
+namespace llvm {
+
+class Module;
+class Function;
+class Value;
+
+/// \brief Structure to hold a use-list order.
+struct UseListOrder {
+  const Value *V;
+  const Function *F;
+  std::vector<unsigned> Shuffle;
+
+  UseListOrder(const Value *V, const Function *F, size_t ShuffleSize)
+      : V(V), F(F), Shuffle(ShuffleSize) {}
+
+  UseListOrder() : V(0), F(0) {}
+  UseListOrder(UseListOrder &&X)
+      : V(X.V), F(X.F), Shuffle(std::move(X.Shuffle)) {}
+  UseListOrder &operator=(UseListOrder &&X) {
+    V = X.V;
+    F = X.F;
+    Shuffle = std::move(X.Shuffle);
+    return *this;
+  }
+
+private:
+  UseListOrder(const UseListOrder &X) LLVM_DELETED_FUNCTION;
+  UseListOrder &operator=(const UseListOrder &X) LLVM_DELETED_FUNCTION;
+};
+
+typedef std::vector<UseListOrder> UseListOrderStack;
+
+/// \brief Whether to preserve use-list ordering.
+bool shouldPreserveBitcodeUseListOrder();
+bool shouldPreserveAssemblyUseListOrder();
+void setPreserveBitcodeUseListOrder(bool ShouldPreserve);
+void setPreserveAssemblyUseListOrder(bool ShouldPreserve);
+
+} // end namespace llvm
+
+#endif