| ========================= |
| LLVM 14.0.0 Release Notes |
| ========================= |
| |
| .. contents:: |
| :local: |
| |
| .. warning:: |
| These are in-progress notes for the upcoming LLVM 14 release. |
| Release notes for previous releases can be found on |
| `the Download Page <https://releases.llvm.org/download.html>`_. |
| |
| |
| Introduction |
| ============ |
| |
| This document contains the release notes for the LLVM Compiler Infrastructure, |
| release 14.0.0. Here we describe the status of LLVM, including major improvements |
| from the previous release, improvements in various subprojects of LLVM, and |
| some of the current users of the code. All LLVM releases may be downloaded |
| from the `LLVM releases web site <https://llvm.org/releases/>`_. |
| |
| For more information about LLVM, including information about the latest |
| release, please check out the `main LLVM web site <https://llvm.org/>`_. If you |
| have questions or comments, the `LLVM Developer's Mailing List |
| <https://lists.llvm.org/mailman/listinfo/llvm-dev>`_ is a good place to send |
| them. |
| |
| Note that if you are reading this file from a Git checkout or the main |
| LLVM web page, this document applies to the *next* release, not the current |
| one. To see the release notes for a specific release, please see the `releases |
| page <https://llvm.org/releases/>`_. |
| |
| Non-comprehensive list of changes in this release |
| ================================================= |
| .. NOTE |
| For small 1-3 sentence descriptions, just add an entry at the end of |
| this list. If your description won't fit comfortably in one bullet |
| point (e.g. maybe you would like to give an example of the |
| functionality, or simply have a lot to talk about), see the `NOTE` below |
| for adding a new subsection. |
| |
| |
| .. NOTE |
| If you would like to document a larger change, then you can add a |
| subsection about it right here. You can copy the following boilerplate |
| and un-indent it (the indentation causes it to be inside this comment). |
| |
| Special New Feature |
| ------------------- |
| |
| Makes programs 10x faster by doing Special New Thing. |
| |
| * ... |
| |
| Changes to the LLVM IR |
| ---------------------- |
| |
| * Using the legacy pass manager for the optimization pipeline is deprecated and |
| will be removed after LLVM 14. In the meantime, only minimal effort will be |
| made to maintain the legacy pass manager for the optimization pipeline. |
| * Max allowed integer type was reduced from 2^24-1 bits to 2^23 bits. |
| * Max allowed alignment was increased from 2^29 to 2^32. |
| |
| Changes to building LLVM |
| ------------------------ |
| |
| * ... |
| |
| Changes to TableGen |
| ------------------- |
| |
| Changes to the AArch64 Backend |
| ------------------------------ |
| |
| * Added support for the Armv9-A, Armv9.1-A and Armv9.2-A architectures. |
| * The compiler now recognises the "tune-cpu" function attribute to support |
| the use of the -mtune frontend flag. This allows certain scheduling features |
| and optimisations to be enabled independently of the architecture. If the |
| "tune-cpu" attribute is absent it tunes according to the "target-cpu". |
| |
| Changes to the ARM Backend |
| -------------------------- |
| |
| * Added support for the Armv9-A, Armv9.1-A and Armv9.2-A architectures. |
| |
| Changes to the MIPS Target |
| -------------------------- |
| |
| During this release ... |
| |
| Changes to the Hexagon Target |
| ----------------------------- |
| |
| * ... |
| |
| Changes to the PowerPC Target |
| ----------------------------- |
| |
| During this release ... |
| |
| Changes to the X86 Target |
| ------------------------- |
| |
| During this release ... |
| |
| * Support for ``AVX512-FP16`` instructions has been added. |
| |
| Changes to the AMDGPU Target |
| ----------------------------- |
| |
| During this release ... |
| |
| Changes to the AVR Target |
| ----------------------------- |
| |
| During this release ... |
| |
| Changes to the WebAssembly Target |
| --------------------------------- |
| |
| During this release ... |
| |
| Changes to the OCaml bindings |
| ----------------------------- |
| |
| |
| Changes to the C API |
| -------------------- |
| |
| * ``LLVMSetInstDebugLocation`` has been deprecated in favor of the more general |
| ``LLVMAddMetadataToInst``. |
| |
| Changes to the Go bindings |
| -------------------------- |
| |
| |
| Changes to the FastISel infrastructure |
| -------------------------------------- |
| |
| * ... |
| |
| Changes to the DAG infrastructure |
| --------------------------------- |
| |
| |
| Changes to the Debug Info |
| --------------------------------- |
| |
| During this release ... |
| |
| Changes to the LLVM tools |
| --------------------------------- |
| |
| * llvm-cov: `-name-allowlist` is now accepted in addition to `-name-whitelist`. |
| `-name-whitelist` is marked as deprecated and to be removed in future |
| releases. |
| |
| Changes to LLDB |
| --------------------------------- |
| |
| * A change in Clang's type printing has changed the way LLDB names array types |
| (from ``int [N]`` to ``int[N]``) - LLDB pretty printer type name matching |
| code may need to be updated to handle this. |
| |
| Changes to Sanitizers |
| --------------------- |
| |
| External Open Source Projects Using LLVM 14 |
| =========================================== |
| |
| * A project... |
| |
| Additional Information |
| ====================== |
| |
| A wide variety of additional information is available on the `LLVM web page |
| <https://llvm.org/>`_, in particular in the `documentation |
| <https://llvm.org/docs/>`_ section. The web page also contains versions of the |
| API documentation which is up-to-date with the Git version of the source |
| code. You can access versions of these documents specific to this release by |
| going into the ``llvm/docs/`` directory in the LLVM tree. |
| |
| If you have any questions or comments about LLVM, please feel free to contact |
| us via the `mailing lists <https://llvm.org/docs/#mailing-lists>`_. |
