1=========================
2LLVM 14.0.0 Release Notes
3=========================
4
5.. contents::
6    :local:
7
8.. warning::
9   These are in-progress notes for the upcoming LLVM 14 release.
10   Release notes for previous releases can be found on
11   `the Download Page <https://releases.llvm.org/download.html>`_.
12
13
14Introduction
15============
16
17This document contains the release notes for the LLVM Compiler Infrastructure,
18release 14.0.0.  Here we describe the status of LLVM, including major improvements
19from the previous release, improvements in various subprojects of LLVM, and
20some of the current users of the code.  All LLVM releases may be downloaded
21from the `LLVM releases web site <https://llvm.org/releases/>`_.
22
23For more information about LLVM, including information about the latest
24release, please check out the `main LLVM web site <https://llvm.org/>`_.  If you
25have questions or comments, the `LLVM Developer's Mailing List
26<https://lists.llvm.org/mailman/listinfo/llvm-dev>`_ is a good place to send
27them.
28
29Note that if you are reading this file from a Git checkout or the main
30LLVM web page, this document applies to the *next* release, not the current
31one.  To see the release notes for a specific release, please see the `releases
32page <https://llvm.org/releases/>`_.
33
34Non-comprehensive list of changes in this release
35=================================================
36.. NOTE
37   For small 1-3 sentence descriptions, just add an entry at the end of
38   this list. If your description won't fit comfortably in one bullet
39   point (e.g. maybe you would like to give an example of the
40   functionality, or simply have a lot to talk about), see the `NOTE` below
41   for adding a new subsection.
42
43
44.. NOTE
45   If you would like to document a larger change, then you can add a
46   subsection about it right here. You can copy the following boilerplate
47   and un-indent it (the indentation causes it to be inside this comment).
48
49   Special New Feature
50   -------------------
51
52   Makes programs 10x faster by doing Special New Thing.
53
54* ...
55
56Changes to the LLVM IR
57----------------------
58
59* Using the legacy pass manager for the optimization pipeline is deprecated and
60  will be removed after LLVM 14. In the meantime, only minimal effort will be
61  made to maintain the legacy pass manager for the optimization pipeline.
62* Max allowed integer type was reduced from 2^24-1 bits to 2^23 bits.
63* Max allowed alignment was increased from 2^29 to 2^32.
64
65Changes to building LLVM
66------------------------
67
68* ...
69
70Changes to TableGen
71-------------------
72
73Changes to the AArch64 Backend
74------------------------------
75
76* Added support for the Armv9-A, Armv9.1-A and Armv9.2-A architectures.
77* The compiler now recognises the "tune-cpu" function attribute to support
78  the use of the -mtune frontend flag. This allows certain scheduling features
79  and optimisations to be enabled independently of the architecture. If the
80  "tune-cpu" attribute is absent it tunes according to the "target-cpu".
81
82Changes to the ARM Backend
83--------------------------
84
85* Added support for the Armv9-A, Armv9.1-A and Armv9.2-A architectures.
86
87Changes to the MIPS Target
88--------------------------
89
90During this release ...
91
92Changes to the Hexagon Target
93-----------------------------
94
95* ...
96
97Changes to the PowerPC Target
98-----------------------------
99
100During this release ...
101
102Changes to the X86 Target
103-------------------------
104
105During this release ...
106
107* Support for ``AVX512-FP16`` instructions has been added.
108
109Changes to the AMDGPU Target
110-----------------------------
111
112During this release ...
113
114Changes to the AVR Target
115-----------------------------
116
117During this release ...
118
119Changes to the WebAssembly Target
120---------------------------------
121
122During this release ...
123
124Changes to the OCaml bindings
125-----------------------------
126
127
128Changes to the C API
129--------------------
130
131* ``LLVMSetInstDebugLocation`` has been deprecated in favor of the more general
132  ``LLVMAddMetadataToInst``.
133
134Changes to the Go bindings
135--------------------------
136
137
138Changes to the FastISel infrastructure
139--------------------------------------
140
141* ...
142
143Changes to the DAG infrastructure
144---------------------------------
145
146
147Changes to the Debug Info
148---------------------------------
149
150During this release ...
151
152Changes to the LLVM tools
153---------------------------------
154
155* ...
156
157Changes to LLDB
158---------------------------------
159
160Changes to Sanitizers
161---------------------
162
163External Open Source Projects Using LLVM 14
164===========================================
165
166* A project...
167
168Additional Information
169======================
170
171A wide variety of additional information is available on the `LLVM web page
172<https://llvm.org/>`_, in particular in the `documentation
173<https://llvm.org/docs/>`_ section.  The web page also contains versions of the
174API documentation which is up-to-date with the Git version of the source
175code.  You can access versions of these documents specific to this release by
176going into the ``llvm/docs/`` directory in the LLVM tree.
177
178If you have any questions or comments about LLVM, please feel free to contact
179us via the `mailing lists <https://llvm.org/docs/#mailing-lists>`_.
180