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spirv: Use nir_vec_scalars() to simplify matrix transpose.

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This should emit fewer instructions that need to be copy-propagated away.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16465>
This commit is contained in:
Emma Anholt 2022-05-02 15:54:12 -07:00 • committed by Marge Bot
parent 633cf4eca1
commit 87d7431198
1 changed files with 6 additions and 9 deletions
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15
src/compiler/spirv/spirv_to_nir.c
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@ -3872,19 +3872,16 @@ vtn_ssa_transpose(struct vtn_builder *b, struct vtn_ssa_value *src)
vtn_create_ssa_value(b, glsl_transposed_type(src->type));
for (unsigned i = 0; i < glsl_get_matrix_columns(dest->type); i++) {
nir_alu_instr *vec = create_vec(b, glsl_get_matrix_columns(src->type),
glsl_get_bit_size(src->type));
if (glsl_type_is_vector_or_scalar(src->type)) {
vec->src[0].src = nir_src_for_ssa(src->def);
vec->src[0].swizzle[0] = i;
dest->elems[i]->def = nir_channel(&b->nb, src->def, i);
} else {
for (unsigned j = 0; j < glsl_get_matrix_columns(src->type); j++) {
vec->src[j].src = nir_src_for_ssa(src->elems[j]->def);
vec->src[j].swizzle[0] = i;
unsigned cols = glsl_get_matrix_columns(src->type);
nir_ssa_scalar srcs[cols];
for (unsigned j = 0; j < cols; j++) {
srcs[j] = nir_get_ssa_scalar(src->elems[j]->def, i);
}
dest->elems[i]->def = nir_vec_scalars(&b->nb, srcs, cols);
}
nir_builder_instr_insert(&b->nb, &vec->instr);
dest->elems[i]->def = &vec->dest.dest.ssa;
}
dest->transposed = src;