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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/102314] [12 Regression] ICE in verify_ssa, at
 tree-ssa.c:1076 since r12-1319-gd4d38135b3137f1d
Date: Tue, 22 Mar 2022 13:58:50 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102314

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |burnus at gcc dot gnu.org

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think those types:
  character(kind=3D1)[1:.y] * y;
don't really make sense for the character(:) allocatables, I think much bet=
ter
would be to leave the TYPE_MAX_VALUE from TYPE_DOMAIN out, making it [1:].
[1:.y] nicely expresses the intent, in most places y (if it is not NULL) sh=
ould
point to [1:.y] array.  But if we emit a DECL_EXPR for it, it will be just
wrong,
the middle-end expects the C/C++ VLA behavior, the size is computed once (w=
hen
encountering the DECL_EXPR), then the VLA is allocated with it and that is =
the
size it has from that point on.
The deferred-length (is that the right term) arrays work differently from t=
his
though, the length can be changed at any time.  So the VLA length is always
determined from the current value of the .y variable (except in the short s=
pots
where that is updated and the var not yet reallocated).=