mirror of https://gitlab.freedesktop.org/mesa/mesa
222 lines
7.7 KiB
C
222 lines
7.7 KiB
C
/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "nir.h"
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#include "nir_builder.h"
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static nir_def *
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load_frag_coord(nir_builder *b, nir_deref_instr *deref,
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const nir_input_attachment_options *options)
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{
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if (options->use_fragcoord_sysval) {
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nir_def *frag_coord = nir_load_frag_coord(b);
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if (options->unscaled_input_attachment_ir3) {
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nir_variable *var = nir_deref_instr_get_variable(deref);
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unsigned base = var->data.index;
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nir_def *unscaled_frag_coord = nir_load_frag_coord_unscaled_ir3(b);
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if (deref->deref_type == nir_deref_type_array) {
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nir_def *unscaled =
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nir_i2b(b, nir_iand(b, nir_ishr(b, nir_imm_int(b, options->unscaled_input_attachment_ir3 >> base), deref->arr.index.ssa),
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nir_imm_int(b, 1)));
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frag_coord = nir_bcsel(b, unscaled, unscaled_frag_coord, frag_coord);
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} else {
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assert(deref->deref_type == nir_deref_type_var);
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bool unscaled = (options->unscaled_input_attachment_ir3 >> base) & 1;
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frag_coord = unscaled ? unscaled_frag_coord : frag_coord;
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}
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}
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return frag_coord;
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}
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nir_variable *pos = nir_get_variable_with_location(b->shader, nir_var_shader_in,
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VARYING_SLOT_POS, glsl_vec4_type());
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/**
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* From Vulkan spec:
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* "The OriginLowerLeft execution mode must not be used; fragment entry
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* points must declare OriginUpperLeft."
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*
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* So at this point origin_upper_left should be true
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*/
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assert(b->shader->info.fs.origin_upper_left == true);
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return nir_load_var(b, pos);
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}
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static nir_def *
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load_layer_id(nir_builder *b, const nir_input_attachment_options *options)
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{
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if (options->use_layer_id_sysval) {
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if (options->use_view_id_for_layer)
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return nir_load_view_index(b);
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else
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return nir_load_layer_id(b);
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}
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gl_varying_slot slot = options->use_view_id_for_layer ? VARYING_SLOT_VIEW_INDEX : VARYING_SLOT_LAYER;
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nir_variable *layer_id = nir_get_variable_with_location(b->shader, nir_var_shader_in,
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slot, glsl_int_type());
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layer_id->data.interpolation = INTERP_MODE_FLAT;
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return nir_load_var(b, layer_id);
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}
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static bool
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try_lower_input_load(nir_builder *b, nir_intrinsic_instr *load,
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const nir_input_attachment_options *options)
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{
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nir_deref_instr *deref = nir_src_as_deref(load->src[0]);
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assert(glsl_type_is_image(deref->type));
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enum glsl_sampler_dim image_dim = glsl_get_sampler_dim(deref->type);
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if (image_dim != GLSL_SAMPLER_DIM_SUBPASS &&
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image_dim != GLSL_SAMPLER_DIM_SUBPASS_MS)
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return false;
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const bool multisampled = (image_dim == GLSL_SAMPLER_DIM_SUBPASS_MS);
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b->cursor = nir_instr_remove(&load->instr);
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nir_def *frag_coord = load_frag_coord(b, deref, options);
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frag_coord = nir_f2i32(b, frag_coord);
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nir_def *offset = nir_trim_vector(b, load->src[1].ssa, 2);
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nir_def *pos = nir_iadd(b, frag_coord, offset);
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nir_def *layer = load_layer_id(b, options);
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nir_def *coord =
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nir_vec3(b, nir_channel(b, pos, 0), nir_channel(b, pos, 1), layer);
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nir_tex_instr *tex = nir_tex_instr_create(b->shader, 3 + multisampled);
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tex->op = nir_texop_txf;
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tex->sampler_dim = image_dim;
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tex->dest_type =
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nir_get_nir_type_for_glsl_base_type(glsl_get_sampler_result_type(deref->type));
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tex->is_array = true;
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tex->is_shadow = false;
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tex->is_sparse = load->intrinsic == nir_intrinsic_image_deref_sparse_load;
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tex->texture_index = 0;
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tex->sampler_index = 0;
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tex->src[0] = nir_tex_src_for_ssa(nir_tex_src_texture_deref,
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&deref->def);
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tex->src[1] = nir_tex_src_for_ssa(nir_tex_src_coord, coord);
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tex->coord_components = 3;
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tex->src[2] = nir_tex_src_for_ssa(nir_tex_src_lod, nir_imm_int(b, 0));
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if (image_dim == GLSL_SAMPLER_DIM_SUBPASS_MS) {
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tex->op = nir_texop_txf_ms;
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tex->src[3].src_type = nir_tex_src_ms_index;
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tex->src[3].src = load->src[2];
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}
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tex->texture_non_uniform = nir_intrinsic_access(load) & ACCESS_NON_UNIFORM;
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nir_def_init(&tex->instr, &tex->def, nir_tex_instr_dest_size(tex), 32);
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nir_builder_instr_insert(b, &tex->instr);
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if (tex->is_sparse) {
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unsigned load_result_size = load->def.num_components - 1;
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nir_component_mask_t load_result_mask = nir_component_mask(load_result_size);
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nir_def *res = nir_channels(
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b, &tex->def, load_result_mask | 0x10);
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nir_def_rewrite_uses(&load->def, res);
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} else {
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nir_def_rewrite_uses(&load->def,
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&tex->def);
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}
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return true;
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}
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static bool
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try_lower_input_texop(nir_builder *b, nir_tex_instr *tex,
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const nir_input_attachment_options *options)
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{
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nir_deref_instr *deref = nir_src_as_deref(tex->src[0].src);
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if (glsl_get_sampler_dim(deref->type) != GLSL_SAMPLER_DIM_SUBPASS_MS)
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return false;
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b->cursor = nir_before_instr(&tex->instr);
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nir_def *frag_coord = load_frag_coord(b, deref, options);
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frag_coord = nir_f2i32(b, frag_coord);
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nir_def *layer = load_layer_id(b, options);
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nir_def *coord = nir_vec3(b, nir_channel(b, frag_coord, 0),
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nir_channel(b, frag_coord, 1), layer);
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tex->coord_components = 3;
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nir_src_rewrite(&tex->src[1].src, coord);
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return true;
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}
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static bool
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lower_input_attachments_instr(nir_builder *b, nir_instr *instr, void *_data)
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{
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const nir_input_attachment_options *options = _data;
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switch (instr->type) {
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case nir_instr_type_tex: {
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nir_tex_instr *tex = nir_instr_as_tex(instr);
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if (tex->op == nir_texop_fragment_mask_fetch_amd ||
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tex->op == nir_texop_fragment_fetch_amd)
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return try_lower_input_texop(b, tex, options);
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return false;
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}
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case nir_instr_type_intrinsic: {
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nir_intrinsic_instr *load = nir_instr_as_intrinsic(instr);
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if (load->intrinsic == nir_intrinsic_image_deref_load ||
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load->intrinsic == nir_intrinsic_image_deref_sparse_load)
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return try_lower_input_load(b, load, options);
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return false;
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}
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default:
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return false;
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}
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}
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bool
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nir_lower_input_attachments(nir_shader *shader,
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const nir_input_attachment_options *options)
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{
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assert(shader->info.stage == MESA_SHADER_FRAGMENT);
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return nir_shader_instructions_pass(shader, lower_input_attachments_instr,
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nir_metadata_block_index |
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nir_metadata_dominance,
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(void *)options);
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}
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