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diff --git a/include/llvm/Transforms/Scalar/GuardWidening.h b/include/llvm/Transforms/Scalar/GuardWidening.h
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+++ b/include/llvm/Transforms/Scalar/GuardWidening.h
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+//===- GuardWidening.h - ----------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Guard widening is an optimization over the @llvm.experimental.guard intrinsic
+// that (optimistically) combines multiple guards into one to have fewer checks
+// at runtime.
+//
+//===----------------------------------------------------------------------===//
+
+
+#ifndef LLVM_TRANSFORMS_SCALAR_GUARD_WIDENING_H
+#define LLVM_TRANSFORMS_SCALAR_GUARD_WIDENING_H
+
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+class Function;
+
+struct GuardWideningPass : public PassInfoMixin<GuardWideningPass> {
+  PreservedAnalyses run(Function &F, AnalysisManager<Function> &AM);
+};
+}
+
+
+#endif  // LLVM_TRANSFORMS_SCALAR_GUARD_WIDENING_H