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diff --git a/include/llvm/Transforms/IPO/PartialInlining.h b/include/llvm/Transforms/IPO/PartialInlining.h
new file mode 100644
index 000000000000..48eb1e30a191
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+++ b/include/llvm/Transforms/IPO/PartialInlining.h
@@ -0,0 +1,32 @@
+//===- PartialInlining.h - Inline parts of functions --------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This pass performs partial inlining, typically by inlining an if statement
+// that surrounds the body of the function.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TRANSFORMS_IPO_PARTIALINLINING_H
+#define LLVM_TRANSFORMS_IPO_PARTIALINLINING_H
+
+#include "llvm/IR/Module.h"
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+/// Pass to remove unused function declarations.
+class PartialInlinerPass : public PassInfoMixin<PartialInlinerPass> {
+public:
+  PreservedAnalyses run(Module &M, ModuleAnalysisManager &);
+
+private:
+  Function *unswitchFunction(Function *F);
+};
+}
+#endif // LLVM_TRANSFORMS_IPO_PARTIALINLINING_H