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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug fortran/98904] valgrind error in gfc_trans_assignment_1 during
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Date: Mon, 01 Feb 2021 09:26:40 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98904

--- Comment #6 from Martin Li=C5=A1ka <marxin at gcc dot gnu.org> ---
(In reply to David Binderman from comment #5)
> Another test case. I compiled source code file dcabs1.f, from the lapack
> package.
>=20
> I got
>=20
> $ /home/dcb/gcc/results.20210131.valgrind/bin/gfortran dcabs1.f
> =3D=3D76833=3D=3D Conditional jump or move depends on uninitialised value=
(s)
> =3D=3D76833=3D=3D    at 0x761595: gfc_trans_assignment_1(gfc_expr*, gfc_e=
xpr*, bool,
> bool, bool, bool) (trans-expr.c:11340)
> =3D=3D76833=3D=3D    by 0x75FE1C: gfc_trans_assignment(gfc_expr*, gfc_exp=
r*, bool,
> bool, bool, bool) (trans-expr.c:11557)
> =3D=3D76833=3D=3D    by 0x71D39A: trans_code(gfc_code*, tree_node*) (tran=
s.c:1922)
> =3D=3D76833=3D=3D    by 0x745B96: gfc_generate_function_code(gfc_namespac=
e*)
> (trans-decl.c:6880)
>=20
> Version of lapack is lapack-3.9.0. Note no optimiser.

Can you please point to the source file.

And can you please use the following valgrind option:
--expensive-definedness-checks=3Dyes ?=