Issues

• Bound sum-factorised kernel stack use by slicing the quadrature points

  FEniCS/ffcx#932 · Filter by author garth-wells opened on Oct 25, 2026

• part="diagonal" never takes its intended branch in _compute_argument_factorization

  FEniCS/ffcx#929 · Filter by author garth-wells opened on Oct 18, 2026

• Scalarisation expands nested index structure superlinearly (reconstruct.py / valuenumbering.py)

  FEniCS/ffcx#909 · Filter by author garth-wells opened on Oct 17, 2026

• HyperElasticity Jacobian kernel ~1.30x slower than a reference compiler at -O2

  FEniCS/ffcx#908 · Filter by author garth-wells opened on Oct 17, 2026

• Simplify if statement in element tables

  housekeeping
  FEniCS/ffcx#837 · Filter by author mscroggs opened on Jun 1, 2026 · 0.12.0

• Interpolation expression support

  enhancementgenerated-codeproposal
  FEniCS/ffcx#827 · Filter by author schnellerhase opened on Mar 24, 2026
  1

• Extend mypy checking to demos and tests

  good first issuetype-hints
  FEniCS/ffcx#802 · Filter by author schnellerhase opened on Nov 27, 2025 · 0.12.0
  

• Improve support for custom integration kernels

  FEniCS/ffcx#750 · Filter by author sclaus2 opened on Feb 21, 2025

• Fix ffcx to create dS integrals for cells with multiple facet types (pyramid, prism etc.)

  FEniCS/ffcx#740 · Filter by author mscroggs opened on Dec 20, 2024
  

• domain_dof_access with multiple domains

  bug
  FEniCS/ffcx#734 · Filter by author mscroggs opened on Dec 5, 2024
  

• Unit stride access of blocked Coefficients

  generated-codeperformance
  FEniCS/ffcx#713 · Filter by author michalhabera opened on Sep 11, 2024
  3

• Optimize float-products with LiteralFloat(0.)

  FEniCS/ffcx#702 · Filter by author jorgensd opened on May 29, 2024

• Facet and Cell averages

  FEniCS/ffcx#693 · Filter by author jorgensd opened on May 3, 2024

• Remove ufcx.h

  proposal
  FEniCS/ffcx#687 · Filter by author garth-wells opened on Apr 26, 2024
  3

• Missing bessel functions

  bug
  FEniCS/ffcx#673 · Filter by author jorgensd opened on Feb 27, 2024
  8

• Quadrature-points symbol not stored as table

  FEniCS/ffcx#650 · Filter by author jorgensd opened on Jan 12, 2024
  1

• Store coefficient values at quadrature points for kernels

  FEniCS/ffcx#565 · Filter by author IgorBaratta opened on Apr 6, 2023

• Support different dof orderings on a cell

  enhancementproposal
  FEniCS/ffcx#557 · Filter by author garth-wells opened on Feb 22, 2023 · 0.12.0
  1

  

• Write quadrature points into generated code?

  proposalquestion
  FEniCS/ffcx#544 · Filter by author mscroggs opened on Nov 8, 2022
  1

• Don't flatten Basix tabulated data

  enhancement
  FEniCS/ffcx#404 · Filter by author mscroggs opened on Oct 26, 2021 · 0.12.0
  

• Non-affine geometric quantities (CellVolume, CellDiameter, FacetArea, ...) are not handled

  FEniCS/ffcx#283 · Filter by author garth-wells opened on Oct 22, 2020
  1

• Factorization failure for certain conditionals

  FEniCS/ffcx#246 · Filter by author mrambausek opened on May 28, 2020
  7

  

• Fix generated code indentation

  good first issue
  FEniCS/ffcx#209 · Filter by author garth-wells opened on Feb 23, 2020
  1