| ============================ |
| LLVM |release| Release Notes |
| ============================ |
| |
| .. contents:: |
| :local: |
| |
| .. only:: PreRelease |
| |
| .. warning:: |
| These are in-progress notes for the upcoming LLVM |version| 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 |release|. 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 `Discourse forums |
| <https://discourse.llvm.org>`_ is a good place to ask |
| 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. |
| |
| * ... |
| |
| Update on required toolchains to build LLVM |
| ------------------------------------------- |
| |
| Changes to the LLVM IR |
| ---------------------- |
| |
| Changes to LLVM infrastructure |
| ------------------------------ |
| |
| Changes to building LLVM |
| ------------------------ |
| |
| Changes to TableGen |
| ------------------- |
| |
| - We can define type aliases via new keyword ``deftype``. |
| |
| Changes to Interprocedural Optimizations |
| ---------------------------------------- |
| |
| Changes to the AArch64 Backend |
| ------------------------------ |
| |
| Changes to the AMDGPU Backend |
| ----------------------------- |
| |
| Changes to the ARM Backend |
| -------------------------- |
| |
| Changes to the AVR Backend |
| -------------------------- |
| |
| Changes to the DirectX Backend |
| ------------------------------ |
| |
| Changes to the Hexagon Backend |
| ------------------------------ |
| |
| Changes to the LoongArch Backend |
| -------------------------------- |
| |
| Changes to the MIPS Backend |
| --------------------------- |
| |
| Changes to the PowerPC Backend |
| ------------------------------ |
| |
| Changes to the RISC-V Backend |
| ----------------------------- |
| |
| * Added full support for the experimental Zabha (Byte and |
| Halfword Atomic Memory Operations) extension. |
| * Added assembler/disassembler support for the experimenatl Zalasr |
| (Load-Acquire and Store-Release) extension. |
| * The names of the majority of the S-prefixed (supervisor-level) extension |
| names in the RISC-V profiles specification are now recognised. |
| * Codegen support was added for the Zimop (May-Be-Operations) extension. |
| * The experimental Ssnpm, Smnpm, Smmpm, Sspm, and Supm 0.8.1 Pointer Masking extensions are supported. |
| * The experimental Ssqosid extension is supported. |
| * Zacas is no longer experimental. |
| |
| Changes to the WebAssembly Backend |
| ---------------------------------- |
| |
| Changes to the Windows Target |
| ----------------------------- |
| |
| Changes to the X86 Backend |
| -------------------------- |
| |
| Changes to the OCaml bindings |
| ----------------------------- |
| |
| Changes to the Python bindings |
| ------------------------------ |
| |
| Changes to the C API |
| -------------------- |
| |
| * Added ``LLVMGetBlockAddressFunction`` and ``LLVMGetBlockAddressBasicBlock`` |
| functions for accessing the values in a blockaddress constant. |
| |
| Changes to the CodeGen infrastructure |
| ------------------------------------- |
| |
| Changes to the Metadata Info |
| --------------------------------- |
| |
| Changes to the Debug Info |
| --------------------------------- |
| |
| Changes to the LLVM tools |
| --------------------------------- |
| * llvm-nm and llvm-objdump can now print symbol information from linked |
| WebAssembly binaries, using information from exports or the "name" |
| section for functions, globals and data segments. Symbol addresses and sizes |
| are printed as offsets in the file, allowing for binary size analysis. Wasm |
| files using reference types and GC are also supported (but also only for |
| functions, globals, and data, and only for listing symbols and names). |
| |
| * llvm-ar now utilizes LLVM_DEFAULT_TARGET_TRIPLE to determine the archive format |
| if it's not specified with the ``--format`` argument and cannot be inferred from |
| input files. |
| |
| * llvm-objcopy now supports ``--set-symbol-visibility`` and |
| ``--set-symbols-visibility`` options for ELF input to change the |
| visibility of symbols. |
| |
| Changes to LLDB |
| --------------------------------- |
| |
| Changes to Sanitizers |
| --------------------- |
| |
| Other Changes |
| ------------- |
| |
| External Open Source Projects Using LLVM 19 |
| =========================================== |
| |
| * 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 `Discourse forums <https://discourse.llvm.org>`_. |
