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/*
* Copyright © 2015 Intel Corporation
* Copyright © 2022 Collabora, LTD
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include "vk_nir.h"
#include "compiler/nir/nir_xfb_info.h"
#include "compiler/spirv/nir_spirv.h"
#include "vk_log.h"
#include "vk_util.h"
#define SPIR_V_MAGIC_NUMBER 0x07230203
uint32_t
vk_spirv_version(const uint32_t *spirv_data, size_t spirv_size_B)
{
assert(spirv_size_B >= 8);
assert(spirv_data[0] == SPIR_V_MAGIC_NUMBER);
return spirv_data[1];
}
static void
spirv_nir_debug(void *private_data,
enum nir_spirv_debug_level level,
size_t spirv_offset,
const char *message)
{
const struct vk_object_base *log_obj = private_data;
switch (level) {
case NIR_SPIRV_DEBUG_LEVEL_INFO:
//vk_logi(VK_LOG_OBJS(log_obj), "SPIR-V offset %lu: %s",
// (unsigned long) spirv_offset, message);
break;
case NIR_SPIRV_DEBUG_LEVEL_WARNING:
vk_logw(VK_LOG_OBJS(log_obj), "SPIR-V offset %lu: %s",
(unsigned long) spirv_offset, message);
break;
case NIR_SPIRV_DEBUG_LEVEL_ERROR:
vk_loge(VK_LOG_OBJS(log_obj), "SPIR-V offset %lu: %s",
(unsigned long) spirv_offset, message);
break;
default:
break;
}
}
static bool
is_not_xfb_output(nir_variable *var, void *data)
{
if (var->data.mode != nir_var_shader_out)
return true;
return !var->data.explicit_xfb_buffer &&
!var->data.explicit_xfb_stride;
}
nir_shader *
vk_spirv_to_nir(struct vk_device *device,
const uint32_t *spirv_data, size_t spirv_size_B,
gl_shader_stage stage, const char *entrypoint_name,
enum gl_subgroup_size subgroup_size,
const VkSpecializationInfo *spec_info,
const struct spirv_to_nir_options *spirv_options,
const struct nir_shader_compiler_options *nir_options,
void *mem_ctx)
{
assert(spirv_size_B >= 4 && spirv_size_B % 4 == 0);
assert(spirv_data[0] == SPIR_V_MAGIC_NUMBER);
struct spirv_to_nir_options spirv_options_local = *spirv_options;
spirv_options_local.debug.func = spirv_nir_debug;
spirv_options_local.debug.private_data = (void *)device;
spirv_options_local.subgroup_size = subgroup_size;
uint32_t num_spec_entries = 0;
struct nir_spirv_specialization *spec_entries =
vk_spec_info_to_nir_spirv(spec_info, &num_spec_entries);
nir_shader *nir = spirv_to_nir(spirv_data, spirv_size_B / 4,
spec_entries, num_spec_entries,
stage, entrypoint_name,
&spirv_options_local, nir_options);
free(spec_entries);
if (nir == NULL)
return NULL;
assert(nir->info.stage == stage);
nir_validate_shader(nir, "after spirv_to_nir");
nir_validate_ssa_dominance(nir, "after spirv_to_nir");
if (mem_ctx != NULL)
ralloc_steal(mem_ctx, nir);
/* We have to lower away local constant initializers right before we
* inline functions. That way they get properly initialized at the top
* of the function and not at the top of its caller.
*/
NIR_PASS_V(nir, nir_lower_variable_initializers, nir_var_function_temp);
NIR_PASS_V(nir, nir_lower_returns);
NIR_PASS_V(nir, nir_inline_functions);
NIR_PASS_V(nir, nir_copy_prop);
NIR_PASS_V(nir, nir_opt_deref);
/* Pick off the single entrypoint that we want */
nir_remove_non_entrypoints(nir);
/* Now that we've deleted all but the main function, we can go ahead and
* lower the rest of the constant initializers. We do this here so that
* nir_remove_dead_variables and split_per_member_structs below see the
* corresponding stores.
*/
NIR_PASS_V(nir, nir_lower_variable_initializers, ~0);
/* Split member structs. We do this before lower_io_to_temporaries so that
* it doesn't lower system values to temporaries by accident.
*/
NIR_PASS_V(nir, nir_split_var_copies);
NIR_PASS_V(nir, nir_split_per_member_structs);
nir_remove_dead_variables_options dead_vars_opts = {
.can_remove_var = is_not_xfb_output,
};
NIR_PASS_V(nir, nir_remove_dead_variables,
nir_var_shader_in | nir_var_shader_out | nir_var_system_value |
nir_var_shader_call_data | nir_var_ray_hit_attrib,
&dead_vars_opts);
/* This needs to happen after remove_dead_vars because GLSLang likes to
* insert dead clip/cull vars and we don't want to clip/cull based on
* uninitialized garbage.
*/
NIR_PASS_V(nir, nir_lower_clip_cull_distance_arrays);
if (nir->info.stage == MESA_SHADER_VERTEX ||
nir->info.stage == MESA_SHADER_TESS_EVAL ||
nir->info.stage == MESA_SHADER_GEOMETRY)
NIR_PASS_V(nir, nir_shader_gather_xfb_info);
NIR_PASS_V(nir, nir_propagate_invariant, false);
return nir;
}
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