[PATCH v3 0/5] fortran: Ignore unused arguments for scalarisation [PR97896]

Mikael Morin mikael@gcc.gnu.org
Sun Nov 7 16:16:31 GMT 2021


This is the third submit of this patch series.
After submitting the v2 [2] for master, and a somewhat different variant for
backport [3], I thought it was defeating the purpose of the backporting
process.  So I have decided to rebase the master patches on the backport
patches, so that the backport patchs can get some testing on master first.

The problematic case is intrinsic procedures where an argument is actually
not used in the code generated (KIND argument of INDEX in the testcase),
which confuses the scalariser.

Thomas König comitted a change to workaround the problem, but it regressed
in PR97896.  These patches put the workaround where I think it is more
appropriate, namely at the beginning of the scalarisation procedure.
That’s what is done by the series [3] initially intended for backport only,
and now for master too.  This series is a followup to them.

What are left in this series are a couple of refactoring for the master
branch only.  They aim at being able to identify the KIND argument of the INDEX
intrinsic by its name, rather than counting the right number of next->next->next
indirections starting with the first argument.  It may seem overkill for just
this use case, but I think it’s worth having that facility in the long term.

Regression-tested on x86_64-linux-gnu.  Ok for master? 

Changes from v2 [2]:

  Rebase on the backport variant of the series.

Changes from v1 [1]:

  Use C structs and enums instead of C++ classes.

[1] https://gcc.gnu.org/pipermail/fortran/2021-August/056303.html
[2] https://gcc.gnu.org/pipermail/fortran/2021-August/056317.html
[3] https://gcc.gnu.org/pipermail/fortran/2021-August/056329.html

Mikael Morin (5):
  fortran: Tiny sort_actual internal refactoring
  fortran: Reverse actual vs dummy argument mapping
  fortran: simplify elemental arguments walking
  fortran: Delete redundant missing_arg_type field
  fortran: Identify arguments by their names

 gcc/fortran/gfortran.h        | 41 +++++++++++++++----
 gcc/fortran/interface.c       | 77 +++++++++++++++++++++++++++++++----
 gcc/fortran/intrinsic.c       | 53 ++++++++++++++++--------
 gcc/fortran/trans-array.c     | 35 +++++-----------
 gcc/fortran/trans-array.h     |  2 +-
 gcc/fortran/trans-expr.c      |  9 +++-
 gcc/fortran/trans-intrinsic.c |  2 +-
 gcc/fortran/trans-stmt.c      | 22 ----------
 gcc/fortran/trans.h           |  4 +-
 9 files changed, 161 insertions(+), 84 deletions(-)


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