1 =========================
2 LLVM 10.0.0 Release Notes
3 =========================
9 These are in-progress notes for the upcoming LLVM 10 release.
10 Release notes for previous releases can be found on
11 `the Download Page <https://releases.llvm.org/download.html>`_.
17 This document contains the release notes for the LLVM Compiler Infrastructure,
18 release 10.0.0. Here we describe the status of LLVM, including major improvements
19 from the previous release, improvements in various subprojects of LLVM, and
20 some of the current users of the code. All LLVM releases may be downloaded
21 from the `LLVM releases web site <https://llvm.org/releases/>`_.
23 For more information about LLVM, including information about the latest
24 release, please check out the `main LLVM web site <https://llvm.org/>`_. If you
25 have questions or comments, the `LLVM Developer's Mailing List
26 <https://lists.llvm.org/mailman/listinfo/llvm-dev>`_ is a good place to send
29 Note that if you are reading this file from a Subversion checkout or the main
30 LLVM web page, this document applies to the *next* release, not the current
31 one. To see the release notes for a specific release, please see the `releases
32 page <https://llvm.org/releases/>`_.
34 Non-comprehensive list of changes in this release
35 =================================================
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.
43 * The ISD::FP_ROUND_INREG opcode and related code was removed from SelectionDAG.
44 * Enabled MemorySSA as a loop dependency.
47 If you would like to document a larger change, then you can add a
48 subsection about it right here. You can copy the following boilerplate
49 and un-indent it (the indentation causes it to be inside this comment).
54 Makes programs 10x faster by doing Special New Thing.
56 Changes to the LLVM IR
57 ----------------------
59 * Unnamed function arguments now get printed with their automatically
60 generated name (e.g. "i32 %0") in definitions. This may require front-ends
61 to update their tests; if so there is a script utils/add_argument_names.py
62 that correctly converted 80-90% of Clang tests. Some manual work will almost
63 certainly still be needed.
66 Changes to building LLVM
67 ------------------------
69 Changes to the ARM Backend
70 --------------------------
72 During this release ...
75 Changes to the MIPS Target
76 --------------------------
78 During this release ...
81 Changes to the PowerPC Target
82 -----------------------------
84 During this release ...
86 Changes to the X86 Target
87 -------------------------
89 During this release ...
91 * Less than 128 bit vector types, v2i32, v4i16, v2i16, v8i8, v4i8, and v2i8, are
92 now stored in the lower bits of an xmm register and the upper bits are
93 undefined. Previously the elements were spread apart with undefined bits in
95 * v32i8 and v64i8 vectors with AVX512F enabled, but AVX512BW disabled will now
96 be passed in ZMM registers for calls and returns. Previously they were passed
97 in two YMM registers. Old behavior can be enabled by passing
98 -x86-enable-old-knl-abi
100 Changes to the AMDGPU Target
101 -----------------------------
103 Changes to the AVR Target
104 -----------------------------
106 During this release ...
108 * Deprecated the mpx feature flag for the Intel MPX instructions. There were no
109 intrinsics for this feature. This change only this effects the results
110 returned by getHostCPUFeatures on CPUs that implement the MPX instructions.
112 Changes to the WebAssembly Target
113 ---------------------------------
115 During this release ...
118 Changes to the OCaml bindings
119 -----------------------------
127 Changes to the DAG infrastructure
128 ---------------------------------
133 External Open Source Projects Using LLVM 10
134 ===========================================
139 Additional Information
140 ======================
142 A wide variety of additional information is available on the `LLVM web page
143 <https://llvm.org/>`_, in particular in the `documentation
144 <https://llvm.org/docs/>`_ section. The web page also contains versions of the
145 API documentation which is up-to-date with the Subversion version of the source
146 code. You can access versions of these documents specific to this release by
147 going into the ``llvm/docs/`` directory in the LLVM tree.
149 If you have any questions or comments about LLVM, please feel free to contact
150 us via the `mailing lists <https://llvm.org/docs/#mailing-lists>`_.