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diff --git a/clang-r353983/include/llvm/Support/Capacity.h b/clang-r353983/include/llvm/Support/Capacity.h
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+//===--- Capacity.h - Generic computation of ADT memory use -----*- 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
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the capacity function that computes the amount of
+// memory used by an ADT.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_CAPACITY_H
+#define LLVM_SUPPORT_CAPACITY_H
+
+#include <cstddef>
+
+namespace llvm {
+
+template <typename T>
+static inline size_t capacity_in_bytes(const T &x) {
+  // This default definition of capacity should work for things like std::vector
+  // and friends.  More specialized versions will work for others.
+  return x.capacity() * sizeof(typename T::value_type);
+}
+
+} // end namespace llvm
+
+#endif
+