Hi Tom! Taking this one to the mailing list; not directly related to PR104364:
On 2022-02-03T13:35:55+0000, "vries at gcc dot gnu.org via Gcc-bugs" <gcc-b...@gcc.gnu.org> wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104364 > I've tested this using (recommended) driver 470.94 on boards: (As not every user will be using the recommended/latest, I too am doing some testing also on oldish Nvidia/CUDA Driver versions.) Combinatorial explosion is a problem, of course... > while iterating over dimensions { -mptx=3.1 , -mptx=6.3 } x { > GOMP_NVPTX_JIT=-O0, <default> }. Do you use separate (nvptx-none offload target only?) builds for different '-mptx' variants (likewise: '-misa'), or have you hacked up the multilib configuration? ('gcc/config/nvptx/t-nvptx:MULTILIB_OPTIONS' etc., I suppose?) Should we add a few representative configurations to be built by default? And/or, should we have a way to 'configure' per user needs (I suppose: '--with-multilib-list=[...]', as supported for a few other targets?)? (I see there's also a new '--with-multilib-generator=[...]', haven't looked in detail.) No matter which way: again, combinatorial explosion is a problem, of course... For example, in addition to the default (fiji/gfx803) for GCN we've got: gcc/config/gcn/t-gcn-hsa:MULTILIB_OPTIONS = march=gfx900/march=gfx906/march=gfx908 gcc/config/gcn/t-gcn-hsa:MULTILIB_DIRNAMES = gfx900 gfx906 gfx908 Grüße Thomas ----------------- Siemens Electronic Design Automation GmbH; Anschrift: Arnulfstraße 201, 80634 München; Gesellschaft mit beschränkter Haftung; Geschäftsführer: Thomas Heurung, Frank Thürauf; Sitz der Gesellschaft: München; Registergericht München, HRB 106955
