1======================
2LLVM 3.9 Release Notes
3======================
4
5.. contents::
6    :local:
7
8.. warning::
9   These are in-progress notes for the upcoming LLVM 3.9 release.  You may
10   prefer the `LLVM 3.8 Release Notes <http://llvm.org/releases/3.8.0/docs
11   /ReleaseNotes.html>`_.
12
13
14Introduction
15============
16
17This document contains the release notes for the LLVM Compiler Infrastructure,
18release 3.9.  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 <http://llvm.org/releases/>`_.
22
23For more information about LLVM, including information about the latest
24release, please check out the `main LLVM web site <http://llvm.org/>`_.  If you
25have questions or comments, the `LLVM Developer's Mailing List
26<http://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 Subversion 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 <http://llvm.org/releases/>`_.
33
34Non-comprehensive list of changes in this release
35=================================================
36* The LLVMContext gains a new runtime check (see
37  LLVMContext::discardValueNames()) that can be set to discard Value names
38  (other than GlobalValue). This is intended to be used in release builds by
39  clients that are interested in saving CPU/memory as much as possible.
40
41* .. note about autoconf build having been removed.
42
43* .. note about C API functions LLVMParseBitcode,
44   LLVMParseBitcodeInContext, LLVMGetBitcodeModuleInContext and
45   LLVMGetBitcodeModule having been removed. LLVMGetTargetMachineData has been
46   removed (use LLVMGetDataLayout instead).
47
48* The C API function LLVMLinkModules has been removed.
49
50* The C API function LLVMAddTargetData has been removed.
51
52* The C API function LLVMGetDataLayout is deprecated
53  in favor of LLVMGetDataLayoutStr.
54
55.. NOTE
56   For small 1-3 sentence descriptions, just add an entry at the end of
57   this list. If your description won't fit comfortably in one bullet
58   point (e.g. maybe you would like to give an example of the
59   functionality, or simply have a lot to talk about), see the `NOTE` below
60   for adding a new subsection.
61
62* ... next change ...
63
64.. NOTE
65   If you would like to document a larger change, then you can add a
66   subsection about it right here. You can copy the following boilerplate
67   and un-indent it (the indentation causes it to be inside this comment).
68
69   Special New Feature
70   -------------------
71
72   Makes programs 10x faster by doing Special New Thing.
73
74Changes to the ARM Backend
75--------------------------
76
77 During this release ...
78
79
80Changes to the MIPS Target
81--------------------------
82
83 During this release ...
84
85
86Changes to the PowerPC Target
87-----------------------------
88
89 During this release ...
90
91
92Changes to the X86 Target
93-----------------------------
94
95 During this release ...
96
97Changes to the AMDGPU Target
98-----------------------------
99
100 * Mesa 11.0.x is no longer supported
101
102
103Changes to the OCaml bindings
104-----------------------------
105
106 During this release ...
107
108Support for attribute 'notail' has been added
109---------------------------------------------
110
111This marker prevents optimization passes from adding 'tail' or
112'musttail' markers to a call. It is used to prevent tail call
113optimization from being performed on the call.
114
115External Open Source Projects Using LLVM 3.9
116============================================
117
118An exciting aspect of LLVM is that it is used as an enabling technology for
119a lot of other language and tools projects. This section lists some of the
120projects that have already been updated to work with LLVM 3.9.
121
122* A project
123
124
125Additional Information
126======================
127
128A wide variety of additional information is available on the `LLVM web page
129<http://llvm.org/>`_, in particular in the `documentation
130<http://llvm.org/docs/>`_ section.  The web page also contains versions of the
131API documentation which is up-to-date with the Subversion version of the source
132code.  You can access versions of these documents specific to this release by
133going into the ``llvm/docs/`` directory in the LLVM tree.
134
135If you have any questions or comments about LLVM, please feel free to contact
136us via the `mailing lists <http://llvm.org/docs/#maillist>`_.
137
138