https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91640
Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |burnus at gcc dot gnu.org
--- Comment #3 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #1)
> Note gimplification fails because we are evaluating in an lvalue context but
> got -_7 in the end. In the past we've hacked around Fortran oddities by
> doing tem = -_7
Doing "tem = -_7" automatically would paper about a FE bug which is surely the
wrong approach!
For this ICE, gfortran is doing a copy-in/copy-out if the argument is not known
to be contiguous (i.e. not simply contiguous). — The copy-in ("tmp = -z") is
fine.
But if it is not a variable, copying-back does not make sense ("-z = tmp").
* * *
Patch: https://gcc.gnu.org/ml/gcc-patches/2020-01/msg00070.html
