[llvm] [llvm]Add a simple Telemetry framework (PR #102323)

[James Henderson via llvm-commits]

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@@ -0,0 +1,136 @@
+//===- llvm/Telemetry/Telemetry.h - Telemetry -------------------*- 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
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// This file provides the basic framework for Telemetry
+///
+/// It comprises of three important structs/classes:
+///
+/// - Telemeter: The class responsible for collecting and forwarding
+///              telemery data.
+/// - TelemetryInfo: data courier
+/// - TelemetryConfig: this stores configurations on Telemeter.
+///
+/// Refer to its documentation at llvm/docs/Telemetry.rst for more details.
+//===---------------------------------------------------------------------===//
+
+#ifndef LLVM_TELEMETRY_TELEMETRY_H
+#define LLVM_TELEMETRY_TELEMETRY_H
+
+#include <chrono>
+#include <ctime>
+#include <memory>
+#include <optional>
+#include <string>
+
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jh7370 wrote:

Nit: LLVM style has system headers after local headers. We also don't generally have a blank line between them. By doing the latter, clang-format will reorder the headers to match the style mentioned.

https://github.com/llvm/llvm-project/pull/102323