zink: delete nir_lower_dynamic_bo_access
no longer used Reviewed-by: Dave Airlie <airlied@redhat.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15906>
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@ -19,7 +19,6 @@
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# SOFTWARE.
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files_libzink = files(
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'nir_lower_dynamic_bo_access.c',
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'zink_lower_cubemap_to_array.c',
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'nir_to_spirv/nir_to_spirv.c',
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'nir_to_spirv/spirv_builder.c',
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@ -1,147 +0,0 @@
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/*
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* Copyright © 2020 Mike Blumenkrantz
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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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* Authors:
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* Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
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*/
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#include "nir.h"
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#include "nir_builder.h"
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bool nir_lower_dynamic_bo_access(nir_shader *shader);
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/**
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* This pass converts dynamic UBO/SSBO block indices to constant indices by generating
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* conditional chains which reduce to single values.
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*
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* This is needed by anything which intends to convert GLSL-like shaders to SPIRV,
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* as SPIRV requires explicit load points for UBO/SSBO variables and has no instruction for
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* loading based on an offset in the underlying driver's binding table
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*/
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/* generate a single ssa value which conditionally selects the right value that
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* was previously loaded by the load_ubo conditional chain
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*/
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static nir_ssa_def *
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recursive_generate_bo_ssa_def(nir_builder *b, nir_intrinsic_instr *instr, nir_ssa_def *index, unsigned start, unsigned end)
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{
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if (start == end - 1) {
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nir_intrinsic_instr *new_instr = nir_intrinsic_instr_create(b->shader, instr->intrinsic);
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new_instr->src[0] = nir_src_for_ssa(nir_imm_int(b, start));
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for (unsigned i = 0; i < nir_intrinsic_infos[instr->intrinsic].num_srcs; i++) {
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if (i)
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nir_src_copy(&new_instr->src[i], &instr->src[i]);
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}
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nir_intrinsic_copy_const_indices(new_instr, instr);
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new_instr->num_components = instr->num_components;
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nir_ssa_dest_init(&new_instr->instr, &new_instr->dest,
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nir_dest_num_components(instr->dest),
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nir_dest_bit_size(instr->dest), NULL);
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nir_builder_instr_insert(b, &new_instr->instr);
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return &new_instr->dest.ssa;
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}
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unsigned mid = start + (end - start) / 2;
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return nir_build_alu(b, nir_op_bcsel, nir_build_alu(b, nir_op_ilt, index, nir_imm_int(b, mid), NULL, NULL),
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recursive_generate_bo_ssa_def(b, instr, index, start, mid),
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recursive_generate_bo_ssa_def(b, instr, index, mid, end),
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NULL
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);
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}
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static void
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generate_store_ssbo_ssa_def(nir_builder *b, nir_intrinsic_instr *instr, nir_ssa_def *index, unsigned start, unsigned end)
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{
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if (start == end - 1) {
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nir_intrinsic_instr *new_instr = nir_instr_as_intrinsic(nir_instr_clone(b->shader, &instr->instr));
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new_instr->src[1] = nir_src_for_ssa(nir_imm_int(b, start));
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nir_builder_instr_insert(b, &new_instr->instr);
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} else {
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int mid = start + (end - start) / 2;
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nir_ssa_def *mid_idx = nir_imm_int(b, mid);
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nir_push_if(b, nir_ilt(b, index, mid_idx));
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generate_store_ssbo_ssa_def(b, instr, index, start, mid);
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nir_push_else(b, NULL);
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generate_store_ssbo_ssa_def(b, instr, index, mid, end);
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nir_pop_if(b, NULL);
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}
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}
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static bool
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lower_dynamic_bo_access_instr(nir_builder *b,
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nir_instr *instr_,
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UNUSED void *cb_data)
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{
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if (instr_->type != nir_instr_type_intrinsic)
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return false;
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nir_intrinsic_instr *instr = nir_instr_as_intrinsic(instr_);
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if (instr->intrinsic != nir_intrinsic_load_ubo &&
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instr->intrinsic != nir_intrinsic_load_ubo_vec4 &&
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instr->intrinsic != nir_intrinsic_get_ssbo_size &&
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instr->intrinsic != nir_intrinsic_load_ssbo &&
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instr->intrinsic != nir_intrinsic_store_ssbo)
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return false;
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/* block index src is 1 for this op */
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unsigned block_idx = instr->intrinsic == nir_intrinsic_store_ssbo;
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if (nir_src_is_const(instr->src[block_idx]))
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return false;
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b->cursor = nir_after_instr(&instr->instr);
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bool ssbo_mode = instr->intrinsic != nir_intrinsic_load_ubo && instr->intrinsic != nir_intrinsic_load_ubo_vec4;
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unsigned first_idx = UINT_MAX, last_idx;
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if (ssbo_mode) {
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nir_foreach_variable_with_modes(var, b->shader, nir_var_mem_ssbo)
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first_idx = MIN2(first_idx, var->data.driver_location);
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last_idx = first_idx + b->shader->info.num_ssbos;
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} else {
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/* skip 0 index if uniform_0 is one we created previously */
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first_idx = !b->shader->info.first_ubo_is_default_ubo;
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last_idx = first_idx + b->shader->info.num_ubos;
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}
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if (instr->intrinsic != nir_intrinsic_store_ssbo) {
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/* now create the composite dest with a bcsel chain based on the original value */
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nir_ssa_def *new_dest = recursive_generate_bo_ssa_def(b, instr,
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instr->src[block_idx].ssa,
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first_idx, last_idx);
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/* now use the composite dest in all cases where the original dest (from the dynamic index)
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* was used and remove the dynamically-indexed load_*bo instruction
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*/
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nir_ssa_def_rewrite_uses_after(&instr->dest.ssa, new_dest,
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&instr->instr);
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} else
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generate_store_ssbo_ssa_def(b, instr, instr->src[block_idx].ssa, first_idx, last_idx);
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nir_instr_remove(&instr->instr);
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return true;
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}
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bool
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nir_lower_dynamic_bo_access(nir_shader *shader)
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{
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return nir_shader_instructions_pass(shader,
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lower_dynamic_bo_access_instr,
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nir_metadata_dominance,
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NULL);
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}
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@ -1484,8 +1484,6 @@ lower_baseinstance(nir_shader *shader)
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return nir_shader_instructions_pass(shader, lower_baseinstance_instr, nir_metadata_dominance, NULL);
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}
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bool nir_lower_dynamic_bo_access(nir_shader *shader);
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/* gl_nir_lower_buffers makes variables unusable for all UBO/SSBO access
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* so instead we delete all those broken variables and just make new ones
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*/
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