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zink: delete all psiz=1.0 stores if maintenance5 is present

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this frees up an output location woooo

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24782>
This commit is contained in:
Mike Blumenkrantz
2023-08-10 10:05:36 -04:00
committed by Marge Bot
parent 23df2bf41b
commit 94941de25b
1 changed files with 19 additions and 8 deletions
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27
src/gallium/drivers/zink/zink_compiler.c
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@@ -2627,15 +2627,21 @@ delete_psiz_store_instr(nir_builder *b, nir_intrinsic_instr *intr, void *data)
}
if (nir_intrinsic_io_semantics(intr).location != VARYING_SLOT_PSIZ)
return false;
nir_instr_remove(&intr->instr);
return true;
if (!data || (nir_src_is_const(intr->src[0]) && fabs(nir_src_as_float(intr->src[0]) - 1.0) < FLT_EPSILON)) {
nir_instr_remove(&intr->instr);
return true;
}
return false;
}
static bool
delete_psiz_store(nir_shader *nir)
delete_psiz_store(nir_shader *nir, bool one)
{
return nir_shader_intrinsics_pass(nir, delete_psiz_store_instr,
nir_metadata_dominance, NULL);
bool progress = nir_shader_intrinsics_pass(nir, delete_psiz_store_instr,
nir_metadata_dominance, one ? nir : NULL);
if (progress)
nir_shader_gather_info(nir, nir_shader_get_entrypoint(nir));
return progress;
}
struct write_components {
@@ -2748,13 +2754,18 @@ zink_compiler_assign_io(struct zink_screen *screen, nir_shader *producer, nir_sh
nir_variable *var = nir_find_variable_with_location(producer, nir_var_shader_out, VARYING_SLOT_PSIZ);
if (var) {
bool can_remove = false;
if (consumer->info.stage != MESA_SHADER_FRAGMENT)
can_remove = !var->data.explicit_location && !nir_find_variable_with_location(consumer, nir_var_shader_in, VARYING_SLOT_PSIZ);
if (!nir_find_variable_with_location(consumer, nir_var_shader_in, VARYING_SLOT_PSIZ)) {
/* maintenance5 guarantees "A default size of 1.0 is used if PointSize is not written" */
if (screen->info.have_KHR_maintenance5 && !var->data.explicit_xfb_buffer && delete_psiz_store(producer, true))
can_remove = !(producer->info.outputs_written & VARYING_BIT_PSIZ);
else if (consumer->info.stage != MESA_SHADER_FRAGMENT)
can_remove = !var->data.explicit_location;
}
/* remove injected pointsize from all but the last vertex stage */
if (can_remove) {
var->data.mode = nir_var_shader_temp;
nir_fixup_deref_modes(producer);
delete_psiz_store(producer);
delete_psiz_store(producer, false);
NIR_PASS_V(producer, nir_remove_dead_variables, nir_var_shader_temp, NULL);
optimize_nir(producer, NULL);
}