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/*
* Copyright © 2019 Red Hat
*
* 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.
*
*/
/* Pass to find libclc functions from a clc library shader and inline
* them into a user shader.
* This pass should only be called once, but it also has to iterate
* itself to make sure all instances are lowered, before validation.
*/
#include "nir.h"
#include "nir_builder.h"
#include "nir_spirv.h"
static bool
lower_clc_call_instr(nir_instr *instr, nir_builder *b,
const nir_shader *clc_shader,
struct hash_table *copy_vars)
{
nir_call_instr *call = nir_instr_as_call(instr);
nir_function *func = NULL;
nir_foreach_function(function, clc_shader) {
if (strcmp(function->name, call->callee->name) == 0) {
func = function;
break;
}
}
if (!func || !func->impl) {
return false;
}
nir_ssa_def **params = rzalloc_array(b->shader, nir_ssa_def*, call->num_params);
for (unsigned i = 0; i < call->num_params; i++) {
params[i] = nir_ssa_for_src(b, call->params[i],
call->callee->params[i].num_components);
}
b->cursor = nir_instr_remove(&call->instr);
nir_inline_function_impl(b, func->impl, params, copy_vars);
ralloc_free(params);
return true;
}
static bool
nir_lower_libclc_impl(nir_function_impl *impl,
const nir_shader *clc_shader,
struct hash_table *copy_vars)
{
nir_builder b;
nir_builder_init(&b, impl);
bool progress = false;
nir_foreach_block_safe(block, impl) {
nir_foreach_instr_safe(instr, block) {
if (instr->type == nir_instr_type_call)
progress |= lower_clc_call_instr(instr, &b, clc_shader, copy_vars);
}
}
if (progress) {
nir_index_ssa_defs(impl);
nir_index_local_regs(impl);
nir_metadata_preserve(impl, nir_metadata_none);
} else {
nir_metadata_preserve(impl, nir_metadata_all);
}
return progress;
}
bool
nir_lower_libclc(nir_shader *shader,
const nir_shader *clc_shader)
{
void *ra_ctx = ralloc_context(NULL);
struct hash_table *copy_vars = _mesa_pointer_hash_table_create(ra_ctx);
bool progress = false, overall_progress = false;
/* do progress passes inside the pass */
do {
progress = false;
nir_foreach_function(function, shader) {
if (function->impl)
progress |= nir_lower_libclc_impl(function->impl, clc_shader, copy_vars);
}
overall_progress |= progress;
} while (progress);
ralloc_free(ra_ctx);
return overall_progress;
}
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