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diff --git a/llvm/include/llvm/CodeGen/Spiller.h b/llvm/include/llvm/CodeGen/Spiller.h
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+++ b/llvm/include/llvm/CodeGen/Spiller.h
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+//===- llvm/CodeGen/Spiller.h - Spiller -------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_CODEGEN_SPILLER_H
+#define LLVM_LIB_CODEGEN_SPILLER_H
+
+namespace llvm {
+
+class LiveRangeEdit;
+class MachineFunction;
+class MachineFunctionPass;
+class VirtRegMap;
+
+/// Spiller interface.
+///
+/// Implementations are utility classes which insert spill or remat code on
+/// demand.
+class Spiller {
+  virtual void anchor();
+
+public:
+  virtual ~Spiller() = 0;
+
+  /// spill - Spill the LRE.getParent() live interval.
+  virtual void spill(LiveRangeEdit &LRE) = 0;
+
+  virtual void postOptimization() {}
+};
+
+/// Create and return a spiller that will insert spill code directly instead
+/// of deferring though VirtRegMap.
+Spiller *createInlineSpiller(MachineFunctionPass &pass, MachineFunction &mf,
+                             VirtRegMap &vrm);
+
+} // end namespace llvm
+
+#endif // LLVM_LIB_CODEGEN_SPILLER_H