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nir/lower_subgroups: optimize reductions with cluster_size == 1

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Reviewed-by: Georg Lehmann <dadschoorse@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/218>
This commit is contained in:
Daniel Schürmann 2023-11-01 16:15:09 +01:00 • committed by Marge Bot
parent 9ac3117e3e
commit 27734c52eb
1 changed files with 3 additions and 1 deletions
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4
src/compiler/nir/nir_lower_subgroups.c
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@ -821,8 +821,10 @@ lower_subgroups_instr(nir_builder *b, nir_instr *instr, void *_options)
nir_intrinsic_set_cluster_size(intrin, 0);
ret = NIR_LOWER_INSTR_PROGRESS;
}
if (nir_intrinsic_cluster_size(intrin) == 1)
return intrin->src[0].ssa;
if (options->lower_to_scalar && intrin->num_components > 1)
ret = lower_subgroup_op_to_scalar(b, intrin);
return lower_subgroup_op_to_scalar(b, intrin);
return ret;
}
case nir_intrinsic_inclusive_scan: