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Clad version 1.9

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@vgvassilev vgvassilev released this 10 Feb 16:09
· 32 commits to master since this release
v1.9
1b45486

Introduction

This document contains the release notes for the automatic differentiation plugin for clang Clad, release 1.9. Clad is built on top of Clang and LLVM compiler infrastructure. Here we describe the status of Clad in some detail, including major improvements from the previous release and new feature work.

Note that if you are reading this file from a git checkout, this document applies to the next release, not the current one.

What's New in Clad 1.9?

Some of the major new features and improvements to Clad are listed here. Generic improvements to Clad as a whole or to its underlying infrastructure are described first.

External Dependencies

  • Clad now works with clang-9 to clang-19

Forward Mode & Reverse Mode

  • Improved differentiation support for complex mathematical expressions.
  • Enhanced function overload handling in both forward and reverse modes.
  • Enable differentiation when functions are defined in transparent contexts.

Forward Mode

  • Optimized forward mode differentiation for performance improvements.
  • Added support for additional intrinsic functions.

Reverse Mode

  • Enhanced handling of control flow structures in reverse mode.
  • Improved memory efficiency during differentiation.
  • Support member calls with xvalue bases in the reverse mode.
  • Initialize object adjoints using a copy of the original when copy constructor is available. Eg: 
    std::vector<...> v{x, y, z};
std::vector<...> _d_v{v}; // The length of the vector is preserved
clad::zero_init(_d_v); // All elements are initialized to 0
    The new clad::zero_init function relies on the iterators to initialize the elements.

CUDA

  • Introduced experimental support for differentiating CUDA kernels.
  • Optimized CUDA differentiation to reduce compilation overhead.

Misc

  • General improvements in documentation and code clarity.
  • Various performance optimizations across Clad.
  • Improved DiffRequest and DynamicGraph printing.

Fixed Bugs

767 917 1082 1112 1215 1216

Special Kudos

This release wouldn't have happened without the efforts of our contributors,
listed in the form of Firstname Lastname (#contributions):

FirstName LastName (#commits)

A B (N)

Vassil Vassilev (36)
petro.zarytskyi (12)
mcbarton (2)
PetroZarytskyi (2)
dependabot[bot] (1)
ToshitJain (1)
Rohith Suresh (1)
Abdelrhman Elrawy (1)

What's Changed

New Contributors

Full Changelog: v1.8...v1.9

Contributors

vgvassilev, dependabot, and 5 other contributors
Assets 2
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