Update more file headers across all of the LLVM projects in the monorepo
to reflect the new license. These used slightly different spellings that
defeated my regular expressions.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351648
GitOrigin-RevId: 57b08b0944046a6a57ee9b7b479181f548a5b9b4

include/__bit_reference

diff --git a/include/__bit_reference b/include/__bit_reference
index c208af2..4fd1d2f 100644
--- a/include/__bit_reference
+++ b/include/__bit_reference
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__bsd_locale_defaults.h

diff --git a/include/__bsd_locale_defaults.h b/include/__bsd_locale_defaults.h
index cbc407d..2ace2a2 100644
--- a/include/__bsd_locale_defaults.h
+++ b/include/__bsd_locale_defaults.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------- __bsd_locale_defaults.h -----------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 // The BSDs have lots of *_l functions.  We don't want to define those symbols

include/__bsd_locale_fallbacks.h

diff --git a/include/__bsd_locale_fallbacks.h b/include/__bsd_locale_fallbacks.h
index 3097b01..a807fe0 100644
--- a/include/__bsd_locale_fallbacks.h
+++ b/include/__bsd_locale_fallbacks.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------- __bsd_locale_fallbacks.h ----------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 // The BSDs have lots of *_l functions.  This file provides reimplementations

include/__config

diff --git a/include/__config b/include/__config
index f22819b..1bd5930 100644
--- a/include/__config
+++ b/include/__config
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- __config ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__config_site.in

diff --git a/include/__config_site.in b/include/__config_site.in
index 580a6aa..0818d6e 100644
--- a/include/__config_site.in
+++ b/include/__config_site.in
@@ -1,9 +1,8 @@
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__debug

diff --git a/include/__debug b/include/__debug
index a8788f6..6ccb72c 100644
--- a/include/__debug
+++ b/include/__debug
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- __debug ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__errc

diff --git a/include/__errc b/include/__errc
index d0f00b7..a8ad29f 100644
--- a/include/__errc
+++ b/include/__errc
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- __errc ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__functional_03

diff --git a/include/__functional_03 b/include/__functional_03
index 0a3bfba..a90cbb7 100644
--- a/include/__functional_03
+++ b/include/__functional_03
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__functional_base

diff --git a/include/__functional_base b/include/__functional_base
index 032be99..8da8324 100644
--- a/include/__functional_base
+++ b/include/__functional_base
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__functional_base_03

diff --git a/include/__functional_base_03 b/include/__functional_base_03
index 8407dcf..e6dac90 100644
--- a/include/__functional_base_03
+++ b/include/__functional_base_03
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__hash_table

diff --git a/include/__hash_table b/include/__hash_table
index 6f5b183..f6b789d 100644
--- a/include/__hash_table
+++ b/include/__hash_table
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__locale

diff --git a/include/__locale b/include/__locale
index cde9cc8..d1d66f9 100644
--- a/include/__locale
+++ b/include/__locale
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__mutex_base

diff --git a/include/__mutex_base b/include/__mutex_base
index da21a5f..008be95 100644
--- a/include/__mutex_base
+++ b/include/__mutex_base
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__node_handle

diff --git a/include/__node_handle b/include/__node_handle
index a9cf3b7..7f3bd9d 100644
--- a/include/__node_handle
+++ b/include/__node_handle
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__nullptr

diff --git a/include/__nullptr b/include/__nullptr
index aa3b4d2..45529a7 100644
--- a/include/__nullptr
+++ b/include/__nullptr
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- __nullptr --------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__sso_allocator

diff --git a/include/__sso_allocator b/include/__sso_allocator
index 8aca049..3930128 100644
--- a/include/__sso_allocator
+++ b/include/__sso_allocator
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__std_stream

diff --git a/include/__std_stream b/include/__std_stream
index db90795..5a9a470 100644
--- a/include/__std_stream
+++ b/include/__std_stream
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__threading_support

diff --git a/include/__threading_support b/include/__threading_support
index 2024900..baa1222 100644
--- a/include/__threading_support
+++ b/include/__threading_support
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__tree

diff --git a/include/__tree b/include/__tree
index 8148510..4144a95 100644
--- a/include/__tree
+++ b/include/__tree
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/__tuple

diff --git a/include/__tuple b/include/__tuple
index 3b23d78..89134b5 100644
--- a/include/__tuple
+++ b/include/__tuple
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/algorithm

diff --git a/include/algorithm b/include/algorithm
index d102899..310256e 100644
--- a/include/algorithm
+++ b/include/algorithm
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- algorithm ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/array

diff --git a/include/array b/include/array
index 56f6887..05c4b65 100644
--- a/include/array
+++ b/include/array
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- array -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/bit

diff --git a/include/bit b/include/bit
index db3812e..a2ca3bc 100644
--- a/include/bit
+++ b/include/bit
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------------ bit ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===---------------------------------------------------------------------===//
 

include/bitset

diff --git a/include/bitset b/include/bitset
index 98947e0..9fb91e9 100644
--- a/include/bitset
+++ b/include/bitset
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- bitset ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cassert

diff --git a/include/cassert b/include/cassert
index 3775990..25a0a74 100644
--- a/include/cassert
+++ b/include/cassert
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- cassert -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/ccomplex

diff --git a/include/ccomplex b/include/ccomplex
index 6ed1164..0d2e0f5 100644
--- a/include/ccomplex
+++ b/include/ccomplex
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- ccomplex ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cctype

diff --git a/include/cctype b/include/cctype
index 7fc8134..55fc9eb 100644
--- a/include/cctype
+++ b/include/cctype
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- cctype ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cerrno

diff --git a/include/cerrno b/include/cerrno
index bab13b8..a9268a2 100644
--- a/include/cerrno
+++ b/include/cerrno
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- cerrno ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cfenv

diff --git a/include/cfenv b/include/cfenv
index 4fc6304..6cd91db 100644
--- a/include/cfenv
+++ b/include/cfenv
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- cfenv -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cfloat

diff --git a/include/cfloat b/include/cfloat
index 0abe84b..da22c6f 100644
--- a/include/cfloat
+++ b/include/cfloat
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- cfloat -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/charconv

diff --git a/include/charconv b/include/charconv
index 064f2e1..ec9baa8 100644
--- a/include/charconv
+++ b/include/charconv
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------------ charconv ------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/chrono

diff --git a/include/chrono b/include/chrono
index 96759f9..f797064 100644
--- a/include/chrono
+++ b/include/chrono
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- chrono ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/ciso646

diff --git a/include/ciso646 b/include/ciso646
index b2efc72..172f167 100644
--- a/include/ciso646
+++ b/include/ciso646
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- ciso646 ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/climits

diff --git a/include/climits b/include/climits
index 81ffecd..43eb2d3 100644
--- a/include/climits
+++ b/include/climits
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- climits ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/clocale

diff --git a/include/clocale b/include/clocale
index 05fa9c6..bff4e92 100644
--- a/include/clocale
+++ b/include/clocale
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- clocale ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cmath

diff --git a/include/cmath b/include/cmath
index f5f62ad..3af9f54 100644
--- a/include/cmath
+++ b/include/cmath
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- cmath -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/codecvt

diff --git a/include/codecvt b/include/codecvt
index 5eb9d15..5ea411e 100644
--- a/include/codecvt
+++ b/include/codecvt
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- codecvt -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/compare

diff --git a/include/compare b/include/compare
index 07f88f0..e05257b 100644
--- a/include/compare
+++ b/include/compare
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- compare -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/complex

diff --git a/include/complex b/include/complex
index 8cf6a94..ff702b4 100644
--- a/include/complex
+++ b/include/complex
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- complex ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/complex.h

diff --git a/include/complex.h b/include/complex.h
index c235966..b78733b 100644
--- a/include/complex.h
+++ b/include/complex.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- complex.h --------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/condition_variable

diff --git a/include/condition_variable b/include/condition_variable
index c45a326..8c73344 100644
--- a/include/condition_variable
+++ b/include/condition_variable
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------- condition_variable ----------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/csetjmp

diff --git a/include/csetjmp b/include/csetjmp
index 58a9c73..ed94b50 100644
--- a/include/csetjmp
+++ b/include/csetjmp
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- csetjmp ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/csignal

diff --git a/include/csignal b/include/csignal
index 9728266..99abd02 100644
--- a/include/csignal
+++ b/include/csignal
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- csignal ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cstdarg

diff --git a/include/cstdarg b/include/cstdarg
index c8b6999..e8147d4 100644
--- a/include/cstdarg
+++ b/include/cstdarg
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- cstdarg ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cstdbool

diff --git a/include/cstdbool b/include/cstdbool
index 2c764a6..fad4714 100644
--- a/include/cstdbool
+++ b/include/cstdbool
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- cstdbool ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cstddef

diff --git a/include/cstddef b/include/cstddef
index b4c42b1..bd62d6d 100644
--- a/include/cstddef
+++ b/include/cstddef
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- cstddef ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cstdint

diff --git a/include/cstdint b/include/cstdint
index 7a187d3..f72fa06 100644
--- a/include/cstdint
+++ b/include/cstdint
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- cstdint ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cstdio

diff --git a/include/cstdio b/include/cstdio
index 00b989f..6755693 100644
--- a/include/cstdio
+++ b/include/cstdio
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- cstdio ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cstdlib

diff --git a/include/cstdlib b/include/cstdlib
index 00c604e..68b3ded 100644
--- a/include/cstdlib
+++ b/include/cstdlib
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- cstdlib ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/ctgmath

diff --git a/include/ctgmath b/include/ctgmath
index 535eb7d..ba1eeea 100644
--- a/include/ctgmath
+++ b/include/ctgmath
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- ctgmath -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/ctime

diff --git a/include/ctime b/include/ctime
index 8264fe3..cb8474f 100644
--- a/include/ctime
+++ b/include/ctime
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- ctime -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/ctype.h

diff --git a/include/ctype.h b/include/ctype.h
index e97ff3c..dcc7935 100644
--- a/include/ctype.h
+++ b/include/ctype.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- ctype.h ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cwchar

diff --git a/include/cwchar b/include/cwchar
index d268e8b..451c621 100644
--- a/include/cwchar
+++ b/include/cwchar
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- cwchar -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/cwctype

diff --git a/include/cwctype b/include/cwctype
index 25b2489..575fd56 100644
--- a/include/cwctype
+++ b/include/cwctype
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- cwctype ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/deque

diff --git a/include/deque b/include/deque
index 6f7d04b..60a1130 100644
--- a/include/deque
+++ b/include/deque
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- deque -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/errno.h

diff --git a/include/errno.h b/include/errno.h
index ee64291..447319e 100644
--- a/include/errno.h
+++ b/include/errno.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- errno.h -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/exception

diff --git a/include/exception b/include/exception
index fdd83d1..63d8ad2 100644
--- a/include/exception
+++ b/include/exception
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- exception ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/__config

diff --git a/include/experimental/__config b/include/experimental/__config
index c6f1776..d3667b5 100644
--- a/include/experimental/__config
+++ b/include/experimental/__config
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- __config ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/__memory

diff --git a/include/experimental/__memory b/include/experimental/__memory
index 229fea6..4cf8978 100644
--- a/include/experimental/__memory
+++ b/include/experimental/__memory
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/algorithm

diff --git a/include/experimental/algorithm b/include/experimental/algorithm
index eb3bad6..79fd7b1 100644
--- a/include/experimental/algorithm
+++ b/include/experimental/algorithm
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- algorithm ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/any

diff --git a/include/experimental/any b/include/experimental/any
index d9c9534..c8050e3 100644
--- a/include/experimental/any
+++ b/include/experimental/any
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------------- any ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 _LIBCPP_EXPERIMENTAL_ANY

include/experimental/chrono

diff --git a/include/experimental/chrono b/include/experimental/chrono
index 30c7e4a..f3ceaae 100644
--- a/include/experimental/chrono
+++ b/include/experimental/chrono
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- chrono ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 _LIBCPP_EXPERIMENTAL_CHRONO

include/experimental/deque

diff --git a/include/experimental/deque b/include/experimental/deque
index f849574..73c2787 100644
--- a/include/experimental/deque
+++ b/include/experimental/deque
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- deque ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/filesystem

diff --git a/include/experimental/filesystem b/include/experimental/filesystem
index 28d8dcf..d2e6237 100644
--- a/include/experimental/filesystem
+++ b/include/experimental/filesystem
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- filesystem -------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 _LIBCPP_EXPERIMENTAL_FILESYSTEM

include/experimental/forward_list

diff --git a/include/experimental/forward_list b/include/experimental/forward_list
index 55e195f..93f6deb 100644
--- a/include/experimental/forward_list
+++ b/include/experimental/forward_list
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- forward_list -----------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/functional

diff --git a/include/experimental/functional b/include/experimental/functional
index f63dfb0..8c55f4f 100644
--- a/include/experimental/functional
+++ b/include/experimental/functional
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- functional --------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/list

diff --git a/include/experimental/list b/include/experimental/list
index 1678ee3..adc64a8 100644
--- a/include/experimental/list
+++ b/include/experimental/list
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- list ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/map

diff --git a/include/experimental/map b/include/experimental/map
index cff2c5e..965d758 100644
--- a/include/experimental/map
+++ b/include/experimental/map
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------- map ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/numeric

diff --git a/include/experimental/numeric b/include/experimental/numeric
index 19c6531..4ea1306 100644
--- a/include/experimental/numeric
+++ b/include/experimental/numeric
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- numeric ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 _LIBCPP_EXPERIMENTAL_NUMERIC

include/experimental/optional

diff --git a/include/experimental/optional b/include/experimental/optional
index 6eb4a26..1749cd6 100644
--- a/include/experimental/optional
+++ b/include/experimental/optional
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- optional ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 _LIBCPP_EXPERIMENTAL_OPTIONAL

include/experimental/propagate_const

diff --git a/include/experimental/propagate_const b/include/experimental/propagate_const
index 1885485..092b013 100644
--- a/include/experimental/propagate_const
+++ b/include/experimental/propagate_const
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------ propagate_const -----------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/ratio

diff --git a/include/experimental/ratio b/include/experimental/ratio
index 52c1200..4cd4fa0 100644
--- a/include/experimental/ratio
+++ b/include/experimental/ratio
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------- ratio ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 _LIBCPP_EXPERIMENTAL_RATIO

include/experimental/regex

diff --git a/include/experimental/regex b/include/experimental/regex
index d38891c..17193cf 100644
--- a/include/experimental/regex
+++ b/include/experimental/regex
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------- regex ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/set

diff --git a/include/experimental/set b/include/experimental/set
index 20cf6d4..52f4df3 100644
--- a/include/experimental/set
+++ b/include/experimental/set
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- list ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/simd

diff --git a/include/experimental/simd b/include/experimental/simd
index 6580443..39ac35e 100644
--- a/include/experimental/simd
+++ b/include/experimental/simd
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------------- simd ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 _LIBCPP_EXPERIMENTAL_SIMD

include/experimental/string

diff --git a/include/experimental/string b/include/experimental/string
index 8b85451..264ff92 100644
--- a/include/experimental/string
+++ b/include/experimental/string
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- string ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/string_view

diff --git a/include/experimental/string_view b/include/experimental/string_view
index 100bdfe..4b59e6d 100644
--- a/include/experimental/string_view
+++ b/include/experimental/string_view
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------ string_view ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 _LIBCPP_EXPERIMENTAL_STRING_VIEW

include/experimental/system_error

diff --git a/include/experimental/system_error b/include/experimental/system_error
index 1cf84ee..094e6d3 100644
--- a/include/experimental/system_error
+++ b/include/experimental/system_error
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- system_error ------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 _LIBCPP_EXPERIMENTAL_SYSTEM_ERROR

include/experimental/tuple

diff --git a/include/experimental/tuple b/include/experimental/tuple
index 6d71bb5..827ef37 100644
--- a/include/experimental/tuple
+++ b/include/experimental/tuple
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------- tuple ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 _LIBCPP_EXPERIMENTAL_TUPLE

include/experimental/type_traits

diff --git a/include/experimental/type_traits b/include/experimental/type_traits
index afe4915..3127c0e 100644
--- a/include/experimental/type_traits
+++ b/include/experimental/type_traits
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- type_traits -------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/unordered_map

diff --git a/include/experimental/unordered_map b/include/experimental/unordered_map
index 1f998c2..eca9cea 100644
--- a/include/experimental/unordered_map
+++ b/include/experimental/unordered_map
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------- unordered_map ------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/unordered_set

diff --git a/include/experimental/unordered_set b/include/experimental/unordered_set
index d00a837..323868f 100644
--- a/include/experimental/unordered_set
+++ b/include/experimental/unordered_set
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------- unordered_set ------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/utility

diff --git a/include/experimental/utility b/include/experimental/utility
index 8effa71..0bca0f7 100644
--- a/include/experimental/utility
+++ b/include/experimental/utility
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- utility ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/experimental/vector

diff --git a/include/experimental/vector b/include/experimental/vector
index bd10492..9b81012 100644
--- a/include/experimental/vector
+++ b/include/experimental/vector
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- vector ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/ext/__hash

diff --git a/include/ext/__hash b/include/ext/__hash
index 318cb1f..98a9544 100644
--- a/include/ext/__hash
+++ b/include/ext/__hash
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------- hash_set ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/ext/hash_map

diff --git a/include/ext/hash_map b/include/ext/hash_map
index 998e8f6..d06a9e3 100644
--- a/include/ext/hash_map
+++ b/include/ext/hash_map
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- hash_map ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/ext/hash_set

diff --git a/include/ext/hash_set b/include/ext/hash_set
index 38f81ed..21e6687 100644
--- a/include/ext/hash_set
+++ b/include/ext/hash_set
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------- hash_set ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/filesystem

diff --git a/include/filesystem b/include/filesystem
index af713a0..6b33ffd 100644
--- a/include/filesystem
+++ b/include/filesystem
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- filesystem -------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 _LIBCPP_FILESYSTEM

include/float.h

diff --git a/include/float.h b/include/float.h
index 759ac8e..5c1e1db 100644
--- a/include/float.h
+++ b/include/float.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- float.h ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/forward_list

diff --git a/include/forward_list b/include/forward_list
index b506acd..bbea71e 100644
--- a/include/forward_list
+++ b/include/forward_list
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------- forward_list ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/fstream

diff --git a/include/fstream b/include/fstream
index 711e484..1902ce9 100644
--- a/include/fstream
+++ b/include/fstream
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------- fstream ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/functional

diff --git a/include/functional b/include/functional
index 9549187..086610e 100644
--- a/include/functional
+++ b/include/functional
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------ functional ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/future

diff --git a/include/future b/include/future
index b3ffc7e..50bdd2d 100644
--- a/include/future
+++ b/include/future
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- future -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/initializer_list

diff --git a/include/initializer_list b/include/initializer_list
index b934637..6c4493b 100644
--- a/include/initializer_list
+++ b/include/initializer_list
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------- initializer_list -----------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/iomanip

diff --git a/include/iomanip b/include/iomanip
index 36c1116..82b7603 100644
--- a/include/iomanip
+++ b/include/iomanip
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- iomanip ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/ios

diff --git a/include/ios b/include/ios
index 040b2d4..9633639 100644
--- a/include/ios
+++ b/include/ios
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- ios -------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/iosfwd

diff --git a/include/iosfwd b/include/iosfwd
index 31f1902..0ffe75f 100644
--- a/include/iosfwd
+++ b/include/iosfwd
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- iosfwd -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/iostream

diff --git a/include/iostream b/include/iostream
index 136a849..595620b 100644
--- a/include/iostream
+++ b/include/iostream
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- iostream ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/istream

diff --git a/include/istream b/include/istream
index 30ee4f4..bedd738 100644
--- a/include/istream
+++ b/include/istream
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- istream ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/iterator

diff --git a/include/iterator b/include/iterator
index bda177e..242f188 100644
--- a/include/iterator
+++ b/include/iterator
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- iterator ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/limits

diff --git a/include/limits b/include/limits
index 5ea9a9e..82c1ea1 100644
--- a/include/limits
+++ b/include/limits
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- limits ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/limits.h

diff --git a/include/limits.h b/include/limits.h
index 1867b10..4a212f8 100644
--- a/include/limits.h
+++ b/include/limits.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- limits.h ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/list

diff --git a/include/list b/include/list
index c69e31d..2afe2a2 100644
--- a/include/list
+++ b/include/list
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- list ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/locale

diff --git a/include/locale b/include/locale
index 2043892..f16d4ba 100644
--- a/include/locale
+++ b/include/locale
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- locale ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/locale.h

diff --git a/include/locale.h b/include/locale.h
index cad7b8b..a21ee38 100644
--- a/include/locale.h
+++ b/include/locale.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- locale.h --------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/map

diff --git a/include/map b/include/map
index 616bb46..47f5c67 100644
--- a/include/map
+++ b/include/map
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------- map ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/math.h

diff --git a/include/math.h b/include/math.h
index 3cc72aa..6f9a76b 100644
--- a/include/math.h
+++ b/include/math.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- math.h ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/memory

diff --git a/include/memory b/include/memory
index ce2c357..3398629 100644
--- a/include/memory
+++ b/include/memory
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- memory ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/mutex

diff --git a/include/mutex b/include/mutex
index 6d2de2b..98bd581 100644
--- a/include/mutex
+++ b/include/mutex
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- mutex ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/new

diff --git a/include/new b/include/new
index 24ffcad..b5e8fb4 100644
--- a/include/new
+++ b/include/new
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------------- new ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/numeric

diff --git a/include/numeric b/include/numeric
index 4e68239..9941770 100644
--- a/include/numeric
+++ b/include/numeric
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- numeric ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/optional

diff --git a/include/optional b/include/optional
index 7042206..be584b3 100644
--- a/include/optional
+++ b/include/optional
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- optional ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/ostream

diff --git a/include/ostream b/include/ostream
index d700a36..b20ac34 100644
--- a/include/ostream
+++ b/include/ostream
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- ostream -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/queue

diff --git a/include/queue b/include/queue
index 4677e52..55be800 100644
--- a/include/queue
+++ b/include/queue
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- queue ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/random

diff --git a/include/random b/include/random
index 724bd0f..a732395 100644
--- a/include/random
+++ b/include/random
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- random -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/ratio

diff --git a/include/ratio b/include/ratio
index 7ee5ec2..fa7a4bb 100644
--- a/include/ratio
+++ b/include/ratio
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- ratio -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/regex

diff --git a/include/regex b/include/regex
index bd83d7c..d479780 100644
--- a/include/regex
+++ b/include/regex
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- regex ------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/scoped_allocator

diff --git a/include/scoped_allocator b/include/scoped_allocator
index bdbb013..237cd42 100644
--- a/include/scoped_allocator
+++ b/include/scoped_allocator
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- scoped_allocator --------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/set

diff --git a/include/set b/include/set
index a0155f0..1783722 100644
--- a/include/set
+++ b/include/set
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- set -------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/setjmp.h

diff --git a/include/setjmp.h b/include/setjmp.h
index 464b4a5..f30a8d4 100644
--- a/include/setjmp.h
+++ b/include/setjmp.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- setjmp.h ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/shared_mutex

diff --git a/include/shared_mutex b/include/shared_mutex
index 3daf74d..fcafd8c 100644
--- a/include/shared_mutex
+++ b/include/shared_mutex
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------ shared_mutex --------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/span

diff --git a/include/span b/include/span
index cebe987..774f698 100644
--- a/include/span
+++ b/include/span
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------------ span ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===---------------------------------------------------------------------===//
 

include/sstream

diff --git a/include/sstream b/include/sstream
index 9c3ee13..71204e0 100644
--- a/include/sstream
+++ b/include/sstream
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- sstream ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/stack

diff --git a/include/stack b/include/stack
index 2b3f8ae..b50ca5c 100644
--- a/include/stack
+++ b/include/stack
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- stack -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/stdbool.h

diff --git a/include/stdbool.h b/include/stdbool.h
index 86a127f..81a7cb3 100644
--- a/include/stdbool.h
+++ b/include/stdbool.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- stdbool.h --------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 _LIBCPP_STDBOOL_H

include/stddef.h

diff --git a/include/stddef.h b/include/stddef.h
index f65065d..6497dcd 100644
--- a/include/stddef.h
+++ b/include/stddef.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- stddef.h ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/stdexcept

diff --git a/include/stdexcept b/include/stdexcept
index 3ec7934..6eda619 100644
--- a/include/stdexcept
+++ b/include/stdexcept
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- stdexcept --------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/stdio.h

diff --git a/include/stdio.h b/include/stdio.h
index 77a314b..e08e6bc 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- stdio.h ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/stdlib.h

diff --git a/include/stdlib.h b/include/stdlib.h
index f11c5e7..2087544 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- stdlib.h ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/streambuf

diff --git a/include/streambuf b/include/streambuf
index dd293dc..48c07d5 100644
--- a/include/streambuf
+++ b/include/streambuf
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------- streambuf ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/strstream

diff --git a/include/strstream b/include/strstream
index b00b9d8..31999bb 100644
--- a/include/strstream
+++ b/include/strstream
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- strstream --------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/android/locale_bionic.h

diff --git a/include/support/android/locale_bionic.h b/include/support/android/locale_bionic.h
index 50fcf5c..5b16071 100644
--- a/include/support/android/locale_bionic.h
+++ b/include/support/android/locale_bionic.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------- support/android/locale_bionic.h ------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/fuchsia/xlocale.h

diff --git a/include/support/fuchsia/xlocale.h b/include/support/fuchsia/xlocale.h
index 1de2fca..b86ce9e 100644
--- a/include/support/fuchsia/xlocale.h
+++ b/include/support/fuchsia/xlocale.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------- support/fuchsia/xlocale.h ------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/ibm/limits.h

diff --git a/include/support/ibm/limits.h b/include/support/ibm/limits.h
index efdb359..d1c59f0 100644
--- a/include/support/ibm/limits.h
+++ b/include/support/ibm/limits.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------- support/ibm/limits.h ---------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/ibm/locale_mgmt_aix.h

diff --git a/include/support/ibm/locale_mgmt_aix.h b/include/support/ibm/locale_mgmt_aix.h
index e3b7a78..e452dc3 100644
--- a/include/support/ibm/locale_mgmt_aix.h
+++ b/include/support/ibm/locale_mgmt_aix.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------- support/ibm/locale_mgmt_aix.h --------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/ibm/support.h

diff --git a/include/support/ibm/support.h b/include/support/ibm/support.h
index 0abfa7f..0569cbe 100644
--- a/include/support/ibm/support.h
+++ b/include/support/ibm/support.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===----------------------- support/ibm/support.h ----------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/ibm/xlocale.h

diff --git a/include/support/ibm/xlocale.h b/include/support/ibm/xlocale.h
index f39c0ba..9f0522c 100644
--- a/include/support/ibm/xlocale.h
+++ b/include/support/ibm/xlocale.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------- support/ibm/xlocale.h -------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/musl/xlocale.h

diff --git a/include/support/musl/xlocale.h b/include/support/musl/xlocale.h
index 3e31c99..722d13f 100644
--- a/include/support/musl/xlocale.h
+++ b/include/support/musl/xlocale.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------- support/musl/xlocale.h ------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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 adds support for the extended locale functions that are currently

include/support/newlib/xlocale.h

diff --git a/include/support/newlib/xlocale.h b/include/support/newlib/xlocale.h
index 09f9e39..25fa798 100644
--- a/include/support/newlib/xlocale.h
+++ b/include/support/newlib/xlocale.h
@@ -1,9 +1,8 @@
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/solaris/floatingpoint.h

diff --git a/include/support/solaris/floatingpoint.h b/include/support/solaris/floatingpoint.h
index 999d144..5f1628f 100644
--- a/include/support/solaris/floatingpoint.h
+++ b/include/support/solaris/floatingpoint.h
@@ -1,9 +1,8 @@
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/solaris/wchar.h

diff --git a/include/support/solaris/wchar.h b/include/support/solaris/wchar.h
index 0e8e660..9dc9ac3 100644
--- a/include/support/solaris/wchar.h
+++ b/include/support/solaris/wchar.h
@@ -1,9 +1,8 @@
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/solaris/xlocale.h

diff --git a/include/support/solaris/xlocale.h b/include/support/solaris/xlocale.h
index e20ef7a..05131f0 100644
--- a/include/support/solaris/xlocale.h
+++ b/include/support/solaris/xlocale.h
@@ -1,9 +1,8 @@
 //===----------------------------------------------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/win32/limits_msvc_win32.h

diff --git a/include/support/win32/limits_msvc_win32.h b/include/support/win32/limits_msvc_win32.h
index 1ab2e0b..7bb8355 100644
--- a/include/support/win32/limits_msvc_win32.h
+++ b/include/support/win32/limits_msvc_win32.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------ support/win32/limits_msvc_win32.h -----------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/win32/locale_win32.h

diff --git a/include/support/win32/locale_win32.h b/include/support/win32/locale_win32.h
index c7c6d78..0d03d83 100644
--- a/include/support/win32/locale_win32.h
+++ b/include/support/win32/locale_win32.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------- support/win32/locale_win32.h -------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/xlocale/__nop_locale_mgmt.h

diff --git a/include/support/xlocale/__nop_locale_mgmt.h b/include/support/xlocale/__nop_locale_mgmt.h
index 0d3f23a..f33d389 100644
--- a/include/support/xlocale/__nop_locale_mgmt.h
+++ b/include/support/xlocale/__nop_locale_mgmt.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------  support/xlocale/__nop_locale_mgmt.h -----------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/support/xlocale/__posix_l_fallback.h

diff --git a/include/support/xlocale/__posix_l_fallback.h b/include/support/xlocale/__posix_l_fallback.h
index b9a0939..f3df6c4 100644
--- a/include/support/xlocale/__posix_l_fallback.h
+++ b/include/support/xlocale/__posix_l_fallback.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------- support/xlocale/__posix_l_fallback.h -----------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 // These are reimplementations of some extended locale functions ( *_l ) that

include/support/xlocale/__strtonum_fallback.h

diff --git a/include/support/xlocale/__strtonum_fallback.h b/include/support/xlocale/__strtonum_fallback.h
index 50b4db3..df38598 100644
--- a/include/support/xlocale/__strtonum_fallback.h
+++ b/include/support/xlocale/__strtonum_fallback.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------- support/xlocale/__strtonum_fallback.h -----------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 // These are reimplementations of some extended locale functions ( *_l ) that

include/system_error

diff --git a/include/system_error b/include/system_error
index 6e2c838..05ef079 100644
--- a/include/system_error
+++ b/include/system_error
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===---------------------------- system_error ----------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/tgmath.h

diff --git a/include/tgmath.h b/include/tgmath.h
index aba8749..2dc1f77 100644
--- a/include/tgmath.h
+++ b/include/tgmath.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- tgmath.h ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/thread

diff --git a/include/thread b/include/thread
index 8c0115f..df06ff7 100644
--- a/include/thread
+++ b/include/thread
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- thread -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/type_traits

diff --git a/include/type_traits b/include/type_traits
index 8b30511..52a46ad 100644
--- a/include/type_traits
+++ b/include/type_traits
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------ type_traits ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/typeindex

diff --git a/include/typeindex b/include/typeindex
index 0565ca9..bff1e65 100644
--- a/include/typeindex
+++ b/include/typeindex
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- typeindex ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/typeinfo

diff --git a/include/typeinfo b/include/typeinfo
index 8411532..451d9c9 100644
--- a/include/typeinfo
+++ b/include/typeinfo
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- typeinfo ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/unordered_map

diff --git a/include/unordered_map b/include/unordered_map
index 6035b05..87278b0 100644
--- a/include/unordered_map
+++ b/include/unordered_map
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- unordered_map -----------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/unordered_set

diff --git a/include/unordered_set b/include/unordered_set
index b4e61da..4cfaa86 100644
--- a/include/unordered_set
+++ b/include/unordered_set
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- unordered_set -----------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/utility

diff --git a/include/utility b/include/utility
index 74bbc5c..770d160 100644
--- a/include/utility
+++ b/include/utility
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- utility -----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/valarray

diff --git a/include/valarray b/include/valarray
index 07f38c8..c9ca08c 100644
--- a/include/valarray
+++ b/include/valarray
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===-------------------------- valarray ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/variant

diff --git a/include/variant b/include/variant
index a4339de..5d0722b 100644
--- a/include/variant
+++ b/include/variant
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------------ variant -------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/vector

diff --git a/include/vector b/include/vector
index edb6d3e..79d1767 100644
--- a/include/vector
+++ b/include/vector
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===------------------------------ vector --------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/version

diff --git a/include/version b/include/version
index e37afc4..1037ee5 100644
--- a/include/version
+++ b/include/version
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- version ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/wchar.h

diff --git a/include/wchar.h b/include/wchar.h
index f74fe6d..353c979 100644
--- a/include/wchar.h
+++ b/include/wchar.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- wchar.h ----------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 

include/wctype.h

diff --git a/include/wctype.h b/include/wctype.h
index f9c5a47..bdcf372 100644
--- a/include/wctype.h
+++ b/include/wctype.h
@@ -1,10 +1,9 @@
 // -*- C++ -*-
 //===--------------------------- wctype.h ---------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//