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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/96306] gcn libgomp build broken after "libomp: Add
 omp_depend_kind to omp_lib.{f90,h}"
Date: Fri, 24 Jul 2020 12:39:35 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96306

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Only by slowing down all 64-bit targets in OpenMP for Fortran by using the
indirection (and make it incompatible with C/C++ too, which is even worse).
I wasn't aware that gcn is BITS_PER_WORD 32 target, that makes it indeed
harder, but for an offloading target that wants to support 64-bit host targ=
ets
I'm afraid the extra work is needed, because user can use the kind=3D16 or
__int128_t types in their code.
It can be minimal support, e.g. just have addti3, subti3, {and,ior,xor}ti3,
shifts and a few others just as expanders that lower it immediately to DImo=
de
code, and for other operations defer to library.
libgcc2.[ch] I think can be convinced through macros to emit code for TImode
implementation using DImode, or you have e.g. config/gcn/lib2-divmod.c that
could be adjusted into lib2-divmodti.c.=