forked from suyu/suyu
75 lines
2.4 KiB
C++
75 lines
2.4 KiB
C++
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// Copyright 2021 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <algorithm>
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#include <ranges>
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#include <tuple>
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#include <type_traits>
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#include "common/bit_cast.h"
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#include "common/bit_util.h"
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#include "shader_recompiler/exception.h"
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#include "shader_recompiler/frontend/ir/ir_emitter.h"
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#include "shader_recompiler/ir_opt/passes.h"
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namespace Shader::Optimization {
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void VertexATransformPass(IR::Program& program) {
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bool replaced_join{};
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bool eliminated_epilogue{};
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for (IR::Block* const block : program.post_order_blocks) {
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for (IR::Inst& inst : block->Instructions()) {
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switch (inst.GetOpcode()) {
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case IR::Opcode::Return:
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inst.ReplaceOpcode(IR::Opcode::Join);
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replaced_join = true;
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break;
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case IR::Opcode::Epilogue:
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inst.Invalidate();
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eliminated_epilogue = true;
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break;
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default:
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break;
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}
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if (replaced_join && eliminated_epilogue) {
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return;
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}
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}
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}
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}
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void VertexBTransformPass(IR::Program& program) {
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for (IR::Block* const block : program.post_order_blocks | std::views::reverse) {
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for (IR::Inst& inst : block->Instructions()) {
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if (inst.GetOpcode() == IR::Opcode::Prologue) {
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return inst.Invalidate();
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}
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}
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}
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}
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void DualVertexJoinPass(IR::Program& program) {
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const auto& blocks = program.blocks;
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s64 s = static_cast<s64>(blocks.size()) - 1;
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if (s < 1) {
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throw NotImplementedException("Dual Vertex Join pass failed, expected atleast 2 blocks!");
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}
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for (s64 index = 0; index < s; index++) {
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IR::Block* const current_block = blocks[index];
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IR::Block* const next_block = blocks[index + 1];
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for (IR::Inst& inst : current_block->Instructions()) {
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if (inst.GetOpcode() == IR::Opcode::Join) {
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IR::IREmitter ir{*current_block, IR::Block::InstructionList::s_iterator_to(inst)};
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ir.Branch(next_block);
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inst.Invalidate();
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// only 1 join should exist
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return;
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}
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}
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}
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throw NotImplementedException("Dual Vertex Join pass failed, no join present!");
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}
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} // namespace Shader::Optimization
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