A pattern that we have been manually implementing in quite some places!

This is not used anymore since we have mixins.

Merge branch 'feature/loopy-invert-matrix' into 'master'

ref:extensions/dune-codegen Moves the matrix inversion stuff from
blockstructured/geometry.py to pdelab/tensor.py. This touches on the subject
of [#139].

You can get the name of the inverse of a matrix A with shape shape from

    name = name_matrix_inverse(A, shape, visitor)

matrix_inverse() returns the inverse wrapped in a pymbolic variable, although
I don't know how useful this is.

TODO:

-   [x] handle inames correctly
-   [ ] what about tags? -\> not really necessary
-   [ ] what about dependencies -\> not really necessary

See merge request [extensions/dune-codegen!295]

  [#139]: gitlab.dune-project.org/NoneNone/issues/139
  [extensions/dune-codegen!295]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/295

Merge branch 'feature/profiling' into 'master'

ref:extensions/dune-codegen I am poking through performance bottlenecks in
order to speed up code generation. This always boils down to memoization of
expensive function calls.

This fixes [#74].

See merge request [extensions/dune-codegen!348]

  [#74]: gitlab.dune-project.org/NoneNone/issues/74
  [extensions/dune-codegen!348]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/348


Closes #74

In the /sumfact_poisson_dg_3d_unstructured_deg2_symdiff_nonquadvec_gradvec
test case this reduces the time spent in evaluation of it from >100s to 6s.

Merge branch 'feature/remove-python2-support' into 'master'

See merge request [extensions/dune-codegen!347]

  [extensions/dune-codegen!347]: Noneextensions/dune-codegen/merge_requests/347

Merge branch 'feature/finite-element-implementation-selection' into 'master'

ref:extensions/dune-codegen So far, we were a bit sloppy about which basis we
choose from the UFL counterpart. This commit implements the necessary 1-to-1
mapping.

This fixes [#146]

See merge request [extensions/dune-codegen!345]

  [#146]: gitlab.dune-project.org/NoneNone/issues/146
  [extensions/dune-codegen!345]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/345


Closes #146

Merge branch 'feature/put-facedir-facemod-info-on-visitor' into 'master'

ref:extensions/dune-codegen This seems like the right thing to do with mixins
in place.

See merge request [extensions/dune-codegen!320]

  [extensions/dune-codegen!320]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/320

IT is both simplicial and quadrilateral...

Merge branch 'feature/remove-rangefield-template-parameter' into 'master'

ref:extensions/dune-codegen In many places we treat this as codegen-time
information anyway. For loopy, this is the necessary way to go.

This fixes [#149].

See merge request [extensions/dune-codegen!344]

  [#149]: gitlab.dune-project.org/NoneNone/issues/149
  [extensions/dune-codegen!344]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/344


Closes #149

So far, we were a bit sloppy about which basis we choose from the UFL
counterpart. This commit implements the necessary 1-to-1 mapping.

Merge branch 'feature/permuting-horizontal_adds' into 'master'

ref:extensions/dune-codegen The number of alternative implementations will
grow in the near future, so its much better to have them in dune-codegen than
patching the VCL\...

See merge request [extensions/dune-codegen!309]

  [extensions/dune-codegen!309]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/309

In many places we treat this as codegen-time information anyway.
For loopy, this is the necessary way to go.

Merge branch 'feature/higher-time-step-order' into 'master'

See merge request [extensions/dune-codegen!343]

  [extensions/dune-codegen!343]: Noneextensions/dune-codegen/merge_requests/343

Merge branch 'feature/latest-dune-testtools' into 'master'

ref:extensions/dune-codegen Which changed the interfacing between Python and
CMake.

See merge request [extensions/dune-codegen!342]

  [extensions/dune-codegen!342]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/342

# Conflicts:
#   python/dune/codegen/pdelab/tensors.py

Merge branch 'feature/more-codegen-time-evaluation' into 'master'

ref:extensions/dune-codegen (Partial) Evaluation of arithmetic expressions at
code generation time is a vital tool to generate minimal-FLOP code and a
genuine advantage of code generation. This MR adds evaluations for matrix
inverses, sums and products.

See merge request [extensions/dune-codegen!331]

  [extensions/dune-codegen!331]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/331

Which changed the interfacing between Python and CMake.

Merge branch 'feature/driver-assert-ini-file' into 'master'

See merge request [extensions/dune-codegen!341]

  [extensions/dune-codegen!341]: Noneextensions/dune-codegen/merge_requests/341

Merge branch 'feature/linearizationpoint-template-parameter' into 'master'

ref:extensions/dune-codegen Last backport from diss branch.

See merge request [extensions/dune-codegen!338]

  [extensions/dune-codegen!338]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/338

Merge branch 'feature/offline-usage' into 'master'

ref:extensions/dune-codegen @rhess Could you try this at some point.

The docs are currently missing how a local package index can be relocated into
a completely isolated environment, but I want to wait until the [devpi
website] is up again to read up on that.

This fixes [#127].

See merge request [extensions/dune-codegen!340]

  [devpi website]: https://doc.devpi.net/
  [#127]: gitlab.dune-project.org/NoneNone/issues/127
  [extensions/dune-codegen!340]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/340


Closes #127

Merge branch 'feature/sde-performance-measuring' into 'master'

ref:extensions/dune-codegen This allows to use [Intel SDE] for performance
measurements. SDE is capable of counting exactly the executed FLOP and
transferred Byte of a program. The output is quite excessive, but it can be
reduced to the essentials with [this] script.

**Warning:** SDE increases the runtime considerably, it should only be used
for small problems.

See merge request [extensions/dune-codegen!328]

  [Intel SDE]: https://software.intel.com/en-us/articles/intel-software-development-emulator/
  [this]: https://bitbucket.org/dwdoerf/stream-ai-example/src/ffccb96ce47c4f3474f1e7f31430c4094479108d/parse-sde.sh?at=master
  [extensions/dune-codegen!328]: gitlab.dune-project.org/extensions/dune-codegen/merge_requests/328