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aco: don't move exec reads around exec writes

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Fixes flickering and blocky plants in Jedi: Fallen Order.

Also fixes flickering squares in The Last of Us Part 1.

fossil-db (navi21):
Totals from 92 (0.07% of 135636) affected shaders:
Instrs: 35324 -> 35354 (+0.08%); split: -0.03%, +0.11%
CodeSize: 189568 -> 189668 (+0.05%); split: -0.03%, +0.08%
Latency: 345305 -> 346529 (+0.35%); split: -0.02%, +0.37%
InvThroughput: 78632 -> 78625 (-0.01%)
SClause: 1955 -> 1972 (+0.87%); split: -0.61%, +1.48%
Copies: 1311 -> 1304 (-0.53%); split: -0.69%, +0.15%

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Cc: mesa-stable
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/8883
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/8878
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22696>
This commit is contained in:
Rhys Perry 2022-02-11 19:19:45 +00:00 committed by Marge Bot
parent 2c77344048
commit 5e20fbd424
1 changed files with 8 additions and 0 deletions
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8
src/amd/compiler/aco_scheduler.cpp
View File

@ -459,6 +459,7 @@ struct hazard_query {
bool contains_spill;
bool contains_sendmsg;
bool uses_exec;
bool writes_exec;
memory_event_set mem_events;
unsigned aliasing_storage; /* storage classes which are accessed (non-SMEM) */
unsigned aliasing_storage_smem; /* storage classes which are accessed (SMEM) */
@ -471,6 +472,7 @@ init_hazard_query(const sched_ctx& ctx, hazard_query* query)
query->contains_spill = false;
query->contains_sendmsg = false;
query->uses_exec = false;
query->writes_exec = false;
memset(&query->mem_events, 0, sizeof(query->mem_events));
query->aliasing_storage = 0;
query->aliasing_storage_smem = 0;
@ -515,6 +517,10 @@ add_to_hazard_query(hazard_query* query, Instruction* instr)
query->contains_spill = true;
query->contains_sendmsg |= instr->opcode == aco_opcode::s_sendmsg;
query->uses_exec |= needs_exec_mask(instr);
for (const Definition& def : instr->definitions) {
if (def.isFixed() && def.physReg() == exec)
query->writes_exec = true;
}
memory_sync_info sync = get_sync_info_with_hack(instr);
@ -560,6 +566,8 @@ perform_hazard_query(hazard_query* query, Instruction* instr, bool upwards)
return hazard_fail_exec;
}
}
if (query->writes_exec && needs_exec_mask(instr))
return hazard_fail_exec;
/* don't move exports so that they stay closer together */
if (instr->isEXP())