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/*
* Copyright (C) 2020 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.
*
* Authors (Collabora):
* Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
*/
#include "main/mtypes.h"
#include "compiler/glsl/glsl_to_nir.h"
#include "compiler/nir_types.h"
#include "main/imports.h"
#include "compiler/nir/nir_builder.h"
#include "disassemble.h"
#include "bifrost_compile.h"
#include "compiler.h"
#include "bi_quirks.h"
#include "bi_print.h"
static bi_block *emit_cf_list(bi_context *ctx, struct exec_list *list);
static bi_block *
create_empty_block(bi_context *ctx)
{
bi_block *blk = rzalloc(ctx, bi_block);
blk->predecessors = _mesa_set_create(blk,
_mesa_hash_pointer,
_mesa_key_pointer_equal);
blk->name = ctx->block_name_count++;
return blk;
}
static bi_block *
emit_block(bi_context *ctx, nir_block *block)
{
ctx->current_block = create_empty_block(ctx);
list_addtail(&ctx->current_block->link, &ctx->blocks);
list_inithead(&ctx->current_block->instructions);
nir_foreach_instr(instr, block) {
//emit_instr(ctx, instr);
++ctx->instruction_count;
}
return ctx->current_block;
}
static bi_block *
emit_cf_list(bi_context *ctx, struct exec_list *list)
{
bi_block *start_block = NULL;
foreach_list_typed(nir_cf_node, node, node, list) {
switch (node->type) {
case nir_cf_node_block: {
bi_block *block = emit_block(ctx, nir_cf_node_as_block(node));
if (!start_block)
start_block = block;
break;
}
#if 0
case nir_cf_node_if:
emit_if(ctx, nir_cf_node_as_if(node));
break;
case nir_cf_node_loop:
emit_loop(ctx, nir_cf_node_as_loop(node));
break;
#endif
default:
unreachable("Unknown control flow");
}
}
return start_block;
}
static int
glsl_type_size(const struct glsl_type *type, bool bindless)
{
return glsl_count_attribute_slots(type, false);
}
static void
bi_optimize_nir(nir_shader *nir)
{
bool progress;
unsigned lower_flrp = 16 | 32 | 64;
NIR_PASS(progress, nir, nir_lower_regs_to_ssa);
NIR_PASS(progress, nir, nir_lower_idiv, nir_lower_idiv_fast);
nir_lower_tex_options lower_tex_options = {
.lower_txs_lod = true,
.lower_txp = ~0,
.lower_tex_without_implicit_lod = true,
.lower_txd = true,
};
NIR_PASS(progress, nir, nir_lower_tex, &lower_tex_options);
do {
progress = false;
NIR_PASS(progress, nir, nir_lower_var_copies);
NIR_PASS(progress, nir, nir_lower_vars_to_ssa);
NIR_PASS(progress, nir, nir_copy_prop);
NIR_PASS(progress, nir, nir_opt_remove_phis);
NIR_PASS(progress, nir, nir_opt_dce);
NIR_PASS(progress, nir, nir_opt_dead_cf);
NIR_PASS(progress, nir, nir_opt_cse);
NIR_PASS(progress, nir, nir_opt_peephole_select, 64, false, true);
NIR_PASS(progress, nir, nir_opt_algebraic);
NIR_PASS(progress, nir, nir_opt_constant_folding);
if (lower_flrp != 0) {
bool lower_flrp_progress = false;
NIR_PASS(lower_flrp_progress,
nir,
nir_lower_flrp,
lower_flrp,
false /* always_precise */,
nir->options->lower_ffma);
if (lower_flrp_progress) {
NIR_PASS(progress, nir,
nir_opt_constant_folding);
progress = true;
}
/* Nothing should rematerialize any flrps, so we only
* need to do this lowering once.
*/
lower_flrp = 0;
}
NIR_PASS(progress, nir, nir_opt_undef);
NIR_PASS(progress, nir, nir_opt_loop_unroll,
nir_var_shader_in |
nir_var_shader_out |
nir_var_function_temp);
} while (progress);
NIR_PASS(progress, nir, nir_opt_algebraic_late);
/* Take us out of SSA */
NIR_PASS(progress, nir, nir_lower_locals_to_regs);
NIR_PASS(progress, nir, nir_convert_from_ssa, true);
}
void
bifrost_compile_shader_nir(nir_shader *nir, bifrost_program *program, unsigned product_id)
{
bi_context *ctx = rzalloc(NULL, bi_context);
ctx->nir = nir;
ctx->stage = nir->info.stage;
ctx->quirks = bifrost_get_quirks(product_id);
list_inithead(&ctx->blocks);
/* Lower gl_Position pre-optimisation, but after lowering vars to ssa
* (so we don't accidentally duplicate the epilogue since mesa/st has
* messed with our I/O quite a bit already) */
NIR_PASS_V(nir, nir_lower_vars_to_ssa);
if (ctx->stage == MESA_SHADER_VERTEX) {
NIR_PASS_V(nir, nir_lower_viewport_transform);
NIR_PASS_V(nir, nir_lower_point_size, 1.0, 1024.0);
}
NIR_PASS_V(nir, nir_split_var_copies);
NIR_PASS_V(nir, nir_lower_global_vars_to_local);
NIR_PASS_V(nir, nir_lower_var_copies);
NIR_PASS_V(nir, nir_lower_vars_to_ssa);
NIR_PASS_V(nir, nir_lower_io, nir_var_all, glsl_type_size, 0);
NIR_PASS_V(nir, nir_lower_ssbo);
/* We have to lower ALU to scalar ourselves since viewport
* transformations produce vector ops */
NIR_PASS_V(nir, nir_lower_alu_to_scalar, NULL, NULL);
bi_optimize_nir(nir);
nir_print_shader(nir, stdout);
nir_foreach_function(func, nir) {
if (!func->impl)
continue;
emit_cf_list(ctx, &func->impl->body);
break; /* TODO: Multi-function shaders */
}
bi_print_shader(ctx, stdout);
ralloc_free(ctx);
}
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