LLVM 23.0.0git Release Notes

Warning

These are in-progress notes for the upcoming LLVM 23.0.0git release. Release notes for previous releases can be found on the Download Page.

Introduction

This document contains the release notes for the LLVM Compiler Infrastructure, release 23.0.0git. 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.

For more information about LLVM, including information about the latest release, please check out the main LLVM web site. If you have questions or comments, the Discourse forums 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.

Non-comprehensive list of changes in this release

  • …

Changes to the LLVM IR

  • Removed llvm.convert.to.fp16 and llvm.convert.from.fp16 intrinsics. These are equivalent to fptrunc and fpext with half with a bitcast.

Changes to LLVM infrastructure

  • Removed TypePromoteFloat legalization from SelectionDAG

Changes to building LLVM

Changes to TableGen

Changes to Interprocedural Optimizations

Changes to Vectorizers

Changes to the AArch64 Backend

Changes to the AMDGPU Backend

  • Initial support for gfx1310

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

  • DWARF fission is now compatible with linker relaxations, allowing -gsplit-dwarf and -mrelax to be used together when building for the LoongArch platform.

Changes to the MIPS Backend

Changes to the NVPTX Backend

  • The default SM version has been changed from sm_30 to sm_75. sm_75 is the oldest GPU variant compatible with the widest range of recent major CUDA Toolkit versions (11/12/13).

Changes to the PowerPC Backend

Changes to the RISC-V Backend

  • llvm-objdump now has support for --symbolize-operands with RISC-V.

  • -mcpu=spacemit-x100 was added.

  • Change P extension version to match the 019 draft specification. Encoded in -march as 0p19.

Changes to the WebAssembly Backend

Changes to the Windows Target

  • The .seh_startchained and .seh_endchained assembly instructions have been removed and replaced with a new .seh_splitchained instruction.

Changes to the X86 Backend

  • .att_syntax directive is now emitted for assembly files when AT&T syntax is in use. This matches the behaviour of Intel syntax and aids with compatibility when changing the default Clang syntax to the Intel syntax.

Changes to the OCaml bindings

Changes to the Python bindings

Changes to the C API

Changes to the CodeGen infrastructure

Changes to the Metadata Info

Changes to the Debug Info

Changes to the LLVM tools

  • llvm-objcopy no longer corrupts the symbol table when --update-section is called for ELF files.

  • FileCheck option -check-prefix now accepts a comma-separated list of prefixes, making it an alias of the existing -check-prefixes option.

Changes to LLDB

Changes to BOLT

Changes to Sanitizers

Other Changes

External Open Source Projects Using LLVM 23.0.0git

Additional Information

A wide variety of additional information is available on the LLVM web page, in particular in the documentation 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.