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/*
* Copyright © 2020 Intel Corporation
*
* 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 "nir.h"
static bool
nir_opt_combine_memory_barriers_impl(
nir_function_impl *impl, nir_combine_memory_barrier_cb combine_cb, void *data)
{
bool progress = false;
nir_foreach_block(block, impl) {
nir_intrinsic_instr *prev = NULL;
nir_foreach_instr_safe(instr, block) {
if (instr->type != nir_instr_type_intrinsic) {
prev = NULL;
continue;
}
nir_intrinsic_instr *current = nir_instr_as_intrinsic(instr);
if (current->intrinsic != nir_intrinsic_scoped_memory_barrier) {
prev = NULL;
continue;
}
if (prev && combine_cb(prev, current, data)) {
nir_instr_remove(¤t->instr);
progress = true;
} else {
prev = current;
}
}
}
if (progress) {
nir_metadata_preserve(impl, nir_metadata_block_index |
nir_metadata_dominance |
nir_metadata_live_ssa_defs);
}
return progress;
}
/* Combine adjacent scoped memory barriers. */
bool
nir_opt_combine_memory_barriers(
nir_shader *shader, nir_combine_memory_barrier_cb combine_cb, void *data)
{
assert(combine_cb);
bool progress = false;
nir_foreach_function(function, shader) {
if (function->impl &&
nir_opt_combine_memory_barriers_impl(function->impl, combine_cb, data)) {
progress = true;
}
}
return progress;
}
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