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/*
* Copyright © 2014 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"
/*
* Handles management of the metadata.
*/
void
nir_metadata_require(nir_function_impl *impl, nir_metadata required, ...)
{
#define NEEDS_UPDATE(X) ((required & ~impl->valid_metadata) & (X))
if (NEEDS_UPDATE(nir_metadata_block_index))
nir_index_blocks(impl);
if (NEEDS_UPDATE(nir_metadata_instr_index))
nir_index_instrs(impl);
if (NEEDS_UPDATE(nir_metadata_dominance))
nir_calc_dominance_impl(impl);
if (NEEDS_UPDATE(nir_metadata_dominance_lca))
nir_calc_dominance_lca_impl(impl);
if (NEEDS_UPDATE(nir_metadata_live_defs))
nir_live_defs_impl(impl);
if (NEEDS_UPDATE(nir_metadata_divergence))
nir_divergence_analysis_impl(impl,
impl->function->shader->options->divergence_analysis_options);
if (required & nir_metadata_loop_analysis) {
va_list ap;
va_start(ap, required);
/* !! Warning !! Do not move these va_arg() call directly to
* nir_loop_analyze_impl() as parameters because the execution order will
* become undefined.
*/
nir_variable_mode indirect_mask = va_arg(ap, nir_variable_mode);
int force_unroll_sampler_indirect = va_arg(ap, int);
va_end(ap);
if (NEEDS_UPDATE(nir_metadata_loop_analysis) ||
indirect_mask != impl->loop_analysis_indirect_mask ||
force_unroll_sampler_indirect != impl->loop_analysis_force_unroll_sampler_indirect) {
nir_loop_analyze_impl(impl, indirect_mask, force_unroll_sampler_indirect);
}
}
#undef NEEDS_UPDATE
impl->valid_metadata |= required;
}
bool
nir_progress(bool progress, nir_function_impl *impl, nir_metadata preserved)
{
/* If we do not make progress, we preserve all metadata. */
if (!progress)
preserved = nir_metadata_all;
if (!(preserved & nir_metadata_dominance))
assert(!(preserved & nir_metadata_dominance_lca));
/* If we discard valid liveness information, immediately free the
* liveness information for each block. For large shaders, it can
* consume a huge amount of memory, and it's usually not immediately
* needed after dirtying.
*/
if ((impl->valid_metadata & ~preserved) & nir_metadata_live_defs) {
nir_foreach_block(block, impl) {
ralloc_free(block->live_in);
ralloc_free(block->live_out);
block->live_in = block->live_out = NULL;
}
}
impl->valid_metadata &= preserved;
return progress;
}
void
nir_shader_preserve_all_metadata(nir_shader *shader)
{
nir_foreach_function_impl(impl, shader) {
nir_no_progress(impl);
}
}
void
nir_metadata_invalidate(nir_shader *shader)
{
nir_foreach_function_impl(impl, shader) {
unsigned instr_idx = UINT32_MAX;
unsigned block_idx = UINT32_MAX;
nir_foreach_block_unstructured(block, impl) {
/* This creates an index that is non-unique, backwards and very large. */
block->index = (block_idx-- & 0xf) + 0xfffffff0;
if (impl->valid_metadata & nir_metadata_live_defs) {
ralloc_free(block->live_in);
ralloc_free(block->live_out);
}
block->live_in = block->live_out = NULL;
if (impl->valid_metadata & nir_metadata_dominance &&
block->dom_children != block->_dom_children_storage)
ralloc_free(block->dom_children);
block->dom_children = NULL;
block->num_dom_children = 1;
block->dom_pre_index = block->dom_post_index = 0;
_mesa_set_clear(&block->dom_frontier, NULL);
if (block->cf_node.parent->type == nir_cf_node_loop &&
nir_cf_node_is_first(&block->cf_node)) {
nir_loop *loop = nir_cf_node_as_loop(block->cf_node.parent);
if (impl->valid_metadata & nir_metadata_loop_analysis)
ralloc_free(loop->info);
loop->info = NULL;
}
block->start_ip = (instr_idx-- & 0xf) + 0xfffffff0;
nir_foreach_instr(instr, block)
instr->index = (instr_idx-- & 0xf) + 0xfffffff0;
block->end_ip = (instr_idx-- & 0xf) + 0xfffffff0;
}
impl->num_blocks = 0;
impl->end_block->index = 0xf;
impl->valid_metadata = 0;
}
}
#ifndef NDEBUG
/**
* Make sure passes properly invalidate metadata (part 1).
*
* Call this before running a pass to set a bogus metadata flag, which will
* only be preserved if the pass forgets to call nir_progress().
*/
void
nir_metadata_set_validation_flag(nir_shader *shader)
{
nir_foreach_function_impl(impl, shader) {
impl->valid_metadata |= nir_metadata_not_properly_reset;
}
}
/**
* Make sure passes properly invalidate metadata (part 2).
*
* Call this after a pass makes progress to verify that the bogus metadata set by
* the earlier function was properly thrown away. Note that passes may not call
* nir_progress() if they don't actually make any changes at all.
*/
void
nir_metadata_check_validation_flag(nir_shader *shader)
{
nir_foreach_function_impl(impl, shader) {
assert(!(impl->valid_metadata & nir_metadata_not_properly_reset));
}
}
void
nir_metadata_require_most(nir_shader *shader)
{
bool force_unroll_sampler_indirect = shader->options->force_indirect_unrolling_sampler;
nir_variable_mode indirect_mask = shader->options->force_indirect_unrolling;
nir_foreach_function_impl(impl, shader) {
nir_metadata md = nir_metadata_all;
/* We don't know if divergence analysis supports this shader. */
md &= ~nir_metadata_divergence;
if (!impl->structured) {
/* These don't support unstructured control flow. */
md &= ~nir_metadata_instr_index;
md &= ~nir_metadata_loop_analysis;
md &= ~nir_metadata_live_defs;
}
nir_metadata_require(impl, md, indirect_mask,
(int)force_unroll_sampler_indirect);
}
}
#endif
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