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nir: sink is_subgroup_invocation_lt_amd

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Having it closer to the branches means we can eliminate an exec copy.

Foz-DB Navi31:
Totals from 11615 (14.63% of 79395) affected shaders:
Instrs: 6804372 -> 6804903 (+0.01%); split: -0.04%, +0.05%
CodeSize: 33684672 -> 33680584 (-0.01%); split: -0.07%, +0.05%
VGPRs: 578616 -> 578604 (-0.00%)
SpillSGPRs: 1506 -> 1304 (-13.41%)
Latency: 29817034 -> 29821320 (+0.01%); split: -0.03%, +0.05%
InvThroughput: 3581587 -> 3581217 (-0.01%); split: -0.02%, +0.01%
VClause: 124826 -> 124782 (-0.04%); split: -0.04%, +0.00%
SClause: 187916 -> 187645 (-0.14%); split: -0.27%, +0.13%
Copies: 520969 -> 510027 (-2.10%); split: -2.20%, +0.10%
PreSGPRs: 442584 -> 421344 (-4.80%)
VALU: 3810755 -> 3810267 (-0.01%); split: -0.01%, +0.00%
SALU: 763402 -> 752650 (-1.41%); split: -1.48%, +0.07%

Reviewed-by: Timur Kristóf <timur.kristof@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31184>
This commit is contained in:
Georg Lehmann 2024-09-15 12:16:54 +02:00 • committed by Marge Bot
parent 78b8ec9c93
commit 41e82b8b8e
1 changed files with 1 additions and 0 deletions
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src/compiler/nir/nir_opt_sink.c
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@ -122,6 +122,7 @@ can_sink_instr(nir_instr *instr, nir_move_options options, bool *can_mov_out_of_
case nir_intrinsic_load_kernel_input:
return options & nir_move_load_uniform;
case nir_intrinsic_inverse_ballot:
case nir_intrinsic_is_subgroup_invocation_lt_amd:
*can_mov_out_of_loop = false;
return options & nir_move_copies;
case nir_intrinsic_load_constant_agx: