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aco/optimizer: add second copy prop for pseudo instructions

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Foz-DB Navi48:
Totals from 28 (0.03% of 82405) affected shaders:
Instrs: 144993 -> 144645 (-0.24%); split: -0.26%, +0.02%
CodeSize: 784668 -> 783604 (-0.14%); split: -0.19%, +0.05%
SpillVGPRs: 215 -> 209 (-2.79%)
Latency: 2529900 -> 2526895 (-0.12%); split: -0.12%, +0.00%
InvThroughput: 775379 -> 773859 (-0.20%); split: -0.20%, +0.00%
VClause: 2815 -> 2803 (-0.43%)
Copies: 23474 -> 23170 (-1.30%); split: -1.38%, +0.09%
Branches: 4638 -> 4632 (-0.13%)
VALU: 81924 -> 81620 (-0.37%); split: -0.40%, +0.03%
SALU: 23986 -> 23995 (+0.04%); split: -0.03%, +0.07%
VMEM: 3726 -> 3714 (-0.32%)

Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39532>
This commit is contained in:
Georg Lehmann 2025-11-27 12:01:02 +01:00 • committed by Marge Bot
parent 269007faf3
commit 5ecc800edd
1 changed files with 17 additions and 0 deletions
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17
src/amd/compiler/aco_optimizer.cpp
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@ -4217,6 +4217,23 @@ combine_instruction(opt_ctx& ctx, aco_ptr<Instruction>& instr)
/* Apply SDWA. Do this after label_instruction() so it can remove
* label_extract if not all instructions can take SDWA. */
alu_propagate_temp_const(ctx, instr, true);
} else if (instr->isPseudo()) {
/* PSEUDO: propagate temporaries/constants */
for (unsigned i = 0; i < instr->operands.size(); i++) {
Operand op = instr->operands[i];
if (!op.isTemp())
continue;
ssa_info info = ctx.info[op.tempId()];
while (info.is_temp()) {
if (pseudo_propagate_temp(ctx, instr, info.temp, i)) {
ctx.uses[info.temp.id()]++;
decrease_and_dce(ctx, op.getTemp());
op = instr->operands[i];
}
info = ctx.info[info.temp.id()];
}
}
}
if (instr->isDPP())