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r600/sfn: make sure that kill and update pred are not in the same group

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The two don't seem to mix well.

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37096>
This commit is contained in:
Gert Wollny 2025-09-03 15:18:45 +02:00 • committed by Marge Bot
parent 6ebda9ca52
commit 359bfc3138
1 changed files with 23 additions and 2 deletions
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25
src/gallium/drivers/r600/sfn/sfn_scheduler.cpp
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@ -616,6 +616,9 @@ BlockScheduler::schedule_alu(Shader::ShaderBlocks& out_blocks, ValueFactory& vf)
if (!alu_vec_ready.empty())
success |= schedule_alu_to_group_vec(group);
if (group->has_kill_op())
break;
/* Apparently one can't schedule a t-slot if there is already
* and LDS instruction scheduled.
* TODO: check whether this is only relevant for actual LDS instructions
@ -865,6 +868,8 @@ BlockScheduler::schedule_alu_to_group_vec(AluGroup *group)
bool success = false;
auto i = alu_vec_ready.begin();
auto e = alu_vec_ready.end();
bool group_has_kill = false;
bool group_has_update_pred = false;
while (i != e) {
sfn_log << SfnLog::schedule << "Try schedule to vec " << **i;
@ -873,9 +878,21 @@ BlockScheduler::schedule_alu_to_group_vec(AluGroup *group)
continue;
}
// precausion: don't kill while we hae LDS queue reads in the pipeline
if ((*i)->is_kill() && m_current_block->lds_group_active())
bool is_kill = (*i)->is_kill();
bool does_update_pred = (*i)->has_alu_flag(alu_update_pred);
// don't kill while we hae LDS queue reads in the pipeline
if (is_kill && (m_current_block->lds_group_active())) {
++i;
continue;
}
// don't put a kill and an update of the predicate into the
// same group
if ((group_has_kill && does_update_pred) || (group_has_update_pred && is_kill)) {
++i;
continue;
}
if (!m_current_block->try_reserve_kcache(**i)) {
sfn_log << SfnLog::schedule << " failed (kcache)\n";
@ -885,6 +902,7 @@ BlockScheduler::schedule_alu_to_group_vec(AluGroup *group)
if (group->add_vec_instructions(*i)) {
(*i)->pin_dest_to_chan();
group_has_update_pred |= (*i)->has_alu_flag(alu_update_pred);
auto old_i = i;
++i;
if ((*old_i)->has_alu_flag(alu_is_lds)) {
@ -924,6 +942,9 @@ BlockScheduler::schedule_alu_to_group_vec(AluGroup *group)
alu_vec_ready.erase(old_i);
success = true;
group_has_kill |= is_kill;
sfn_log << SfnLog::schedule << " success\n";
} else {
++i;