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-rw-r--r--src/compiler/nir/nir.h1
-rw-r--r--src/compiler/nir/nir_lower_subgroups.c5
2 files changed, 5 insertions, 1 deletions
diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
index a8e4184f1d5..0ac3f45ccec 100644
--- a/src/compiler/nir/nir.h
+++ b/src/compiler/nir/nir.h
@@ -3839,6 +3839,7 @@ typedef struct nir_lower_subgroups_options {
bool lower_shuffle:1;
bool lower_shuffle_to_32bit:1;
bool lower_quad:1;
+ bool lower_quad_broadcast_dynamic:1;
} nir_lower_subgroups_options;
bool nir_lower_subgroups(nir_shader *shader,
diff --git a/src/compiler/nir/nir_lower_subgroups.c b/src/compiler/nir/nir_lower_subgroups.c
index 249d5e446bd..4462c708ec8 100644
--- a/src/compiler/nir/nir_lower_subgroups.c
+++ b/src/compiler/nir/nir_lower_subgroups.c
@@ -473,7 +473,10 @@ lower_subgroups_instr(nir_builder *b, nir_instr *instr, void *_options)
case nir_intrinsic_quad_swap_horizontal:
case nir_intrinsic_quad_swap_vertical:
case nir_intrinsic_quad_swap_diagonal:
- if (options->lower_quad)
+ if (options->lower_quad ||
+ (options->lower_quad_broadcast_dynamic &&
+ intrin->intrinsic == nir_intrinsic_quad_broadcast &&
+ !nir_src_is_const(intrin->src[1])))
return lower_shuffle(b, intrin, options->lower_to_scalar, false);
else if (options->lower_to_scalar && intrin->num_components > 1)
return lower_subgroup_op_to_scalar(b, intrin, false);