From e6d1592492a3a379186bfb02bd0f4eda0669c0d5 Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Tue, 20 Aug 2019 20:50:12 +0000
Subject: Vendor import of stripped llvm trunk r366426 (just before the
 release_90 branch point):

https://llvm.org/svn/llvm-project/llvm/trunk@366426
---
 include/llvm/Support/Signposts.h | 43 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 include/llvm/Support/Signposts.h

(limited to 'include/llvm/Support/Signposts.h')

diff --git a/include/llvm/Support/Signposts.h b/include/llvm/Support/Signposts.h
new file mode 100644
index 000000000000..b5a8c3d61e3e
--- /dev/null
+++ b/include/llvm/Support/Signposts.h
@@ -0,0 +1,43 @@
+//===-- llvm/Support/Signposts.h - Interval debug annotations ---*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file Some OS's provide profilers that allow applications to provide custom
+/// annotations to the profiler. For example, on Xcode 10 and later 'signposts'
+/// can be emitted by the application and these will be rendered to the Points
+/// of Interest track on the instruments timeline.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SUPPORT_SIGNPOSTS_H
+#define LLVM_SUPPORT_SIGNPOSTS_H
+
+namespace llvm {
+class SignpostEmitterImpl;
+class Timer;
+
+/// Manages the emission of signposts into the recording method supported by
+/// the OS.
+class SignpostEmitter {
+  SignpostEmitterImpl *Impl;
+
+public:
+  SignpostEmitter();
+  ~SignpostEmitter();
+
+  bool isEnabled() const;
+
+  /// Begin a signposted interval for the given timer.
+  void startTimerInterval(Timer *T);
+  /// End a signposted interval for the given timer.
+  void endTimerInterval(Timer *T);
+};
+
+} // end namespace llvm
+
+#endif // ifndef LLVM_SUPPORT_SIGNPOSTS_H
-- 
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