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nir: Handle per-view io in nir_io_add_const_offset_to_base()

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This isn't strictly necessary for freedreno, since we aren't using it
yet, but I wanted to avoid any problems if we do. If we wanted to handle
this "properly", and handle matrix and array per-view variables, we'd
probably want to encode the "view stride" (number of views per user
location) and base view in the intrinsic, but for now we just don't do
any offsetting and assume the indirect offset is the view.

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6514>
This commit is contained in:
Connor Abbott 2020-09-29 12:02:41 +02:00 • committed by Marge Bot
parent bc8a5c0752
commit 51e2b31039
1 changed files with 3 additions and 1 deletions
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4
src/compiler/nir/nir_lower_io.c
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@ -2260,7 +2260,9 @@ add_const_offset_to_base_block(nir_block *block, nir_builder *b,
((modes & nir_var_shader_out) && is_output(intrin))) {
nir_src *offset = nir_get_io_offset_src(intrin);
if (nir_src_is_const(*offset)) {
/* TODO: Better handling of per-view variables here */
if (nir_src_is_const(*offset) &&
!nir_intrinsic_io_semantics(intrin).per_view) {
unsigned off = nir_src_as_uint(*offset);
nir_intrinsic_set_base(intrin, nir_intrinsic_base(intrin) + off);