LLVM 11.0.0 Release Notes

Warning

These are in-progress notes for the upcoming LLVM 11 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 11.0.0. 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.

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 LLVM Developer’s Mailing List 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.

Non-comprehensive list of changes in this release

Changes to the LLVM IR

  • The callsite attribute vector-function-abi-variant has been added to describe the mapping between scalar functions and vector functions, to enable vectorization of call sites. The information provided by the attribute is interfaced via the API provided by the VFDatabase class.

Changes to the ARM Backend

During this release …

  • Implemented C-language intrinsics for the full Arm v8.1-M MVE instruction set. <arm_mve.h> now supports the complete API defined in the Arm C Language Extensions.

Changes to the MIPS Target

During this release …

Changes to the PowerPC Target

During this release …

Changes to the X86 Target

During this release …

  • Functions with the probe-stack attribute set to “inline-asm” are now protected against stack clash without the need of a third-party probing function and with limited impact on performance.

Changes to the AVR Target

  • Moved from an experimental backend to an official backend. AVR support is now included by default in all LLVM builds and releases and is available under the “avr-unknown-unknown” target triple.

Changes to the WebAssembly Target

During this release …

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.

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