Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 40 insertions, 0 deletions

diff --git a/clang-r353983/include/llvm/XRay/FDRLogBuilder.h b/clang-r353983/include/llvm/XRay/FDRLogBuilder.h
new file mode 100644
index 00000000..3f49dc6d
--- /dev/null
+++ b/clang-r353983/include/llvm/XRay/FDRLogBuilder.h
@@ -0,0 +1,40 @@
+//===- FDRLogBuilder.h - XRay FDR Log Building Utility --------------------===//
+//
+// 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_INCLUDE_LLVM_XRAY_FDRLOGBUILDER_H_
+#define LLVM_INCLUDE_LLVM_XRAY_FDRLOGBUILDER_H_
+
+#include "llvm/XRay/FDRRecords.h"
+
+namespace llvm {
+namespace xray {
+
+/// The LogBuilder class allows for creating ad-hoc collections of records
+/// through the `add<...>(...)` function. An example use of this API is in
+/// crafting arbitrary sequences of records:
+///
+///   auto Records = LogBuilder()
+///       .add<BufferExtents>(256)
+///       .add<NewBufferRecord>(1)
+///       .consume();
+///
+class LogBuilder {
+  std::vector<std::unique_ptr<Record>> Records;
+
+public:
+  template <class R, class... T> LogBuilder &add(T &&... A) {
+    Records.emplace_back(new R(std::forward<T>(A)...));
+    return *this;
+  }
+
+  std::vector<std::unique_ptr<Record>> consume() { return std::move(Records); }
+};
+
+} // namespace xray
+} // namespace llvm
+
+#endif // LLVM_INCLUDE_LLVM_XRAY_FDRLOGBUILDER_H_