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zink: prune unused st-injected pointsize exports

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only the last vertex stage needs to keep these, so prune any that aren't
being weirdly passed through

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15853>
This commit is contained in:
Mike Blumenkrantz 2022-04-08 09:18:17 -04:00 • committed by Marge Bot
parent cf3f3791e3
commit c7ae22e4b8
1 changed files with 10 additions and 0 deletions
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10
src/gallium/drivers/zink/zink_compiler.c
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@ -1176,6 +1176,16 @@ zink_compiler_assign_io(nir_shader *producer, nir_shader *consumer)
memset(patch_slot_map, -1, sizeof(patch_slot_map));
bool do_fixup = false;
nir_shader *nir = producer->info.stage == MESA_SHADER_TESS_CTRL ? producer : consumer;
if (consumer->info.stage != MESA_SHADER_FRAGMENT) {
/* remove injected pointsize from all but the last vertex stage */
nir_variable *var = nir_find_variable_with_location(producer, nir_var_shader_out, VARYING_SLOT_PSIZ);
if (var && !var->data.explicit_location) {
var->data.mode = nir_var_shader_temp;
nir_fixup_deref_modes(producer);
NIR_PASS_V(producer, nir_remove_dead_variables, nir_var_shader_temp, NULL);
optimize_nir(producer);
}
}
if (producer->info.stage == MESA_SHADER_TESS_CTRL) {
/* never assign from tcs -> tes, always invert */
nir_foreach_variable_with_modes(var, consumer, nir_var_shader_in)