diff options
Diffstat (limited to 'src/video_core/shader/control_flow.cpp')
| -rw-r--r-- | src/video_core/shader/control_flow.cpp | 751 |
1 files changed, 0 insertions, 751 deletions
diff --git a/src/video_core/shader/control_flow.cpp b/src/video_core/shader/control_flow.cpp deleted file mode 100644 index 43d965f2f..000000000 --- a/src/video_core/shader/control_flow.cpp +++ /dev/null @@ -1,751 +0,0 @@ -// Copyright 2019 yuzu Emulator Project -// Licensed under GPLv2 or any later version -// Refer to the license.txt file included. - -#include <list> -#include <map> -#include <set> -#include <stack> -#include <unordered_map> -#include <vector> - -#include "common/assert.h" -#include "common/common_types.h" -#include "video_core/shader/ast.h" -#include "video_core/shader/control_flow.h" -#include "video_core/shader/memory_util.h" -#include "video_core/shader/registry.h" -#include "video_core/shader/shader_ir.h" - -namespace VideoCommon::Shader { - -namespace { - -using Tegra::Shader::Instruction; -using Tegra::Shader::OpCode; - -constexpr s32 unassigned_branch = -2; - -struct Query { - u32 address{}; - std::stack<u32> ssy_stack{}; - std::stack<u32> pbk_stack{}; -}; - -struct BlockStack { - BlockStack() = default; - explicit BlockStack(const Query& q) : ssy_stack{q.ssy_stack}, pbk_stack{q.pbk_stack} {} - std::stack<u32> ssy_stack{}; - std::stack<u32> pbk_stack{}; -}; - -template <typename T, typename... Args> -BlockBranchInfo MakeBranchInfo(Args&&... args) { - static_assert(std::is_convertible_v<T, BranchData>); - return std::make_shared<BranchData>(T(std::forward<Args>(args)...)); -} - -bool BlockBranchIsIgnored(BlockBranchInfo first) { - bool ignore = false; - if (std::holds_alternative<SingleBranch>(*first)) { - const auto branch = std::get_if<SingleBranch>(first.get()); - ignore = branch->ignore; - } - return ignore; -} - -struct BlockInfo { - u32 start{}; - u32 end{}; - bool visited{}; - BlockBranchInfo branch{}; - - bool IsInside(const u32 address) const { - return start <= address && address <= end; - } -}; - -struct CFGRebuildState { - explicit CFGRebuildState(const ProgramCode& program_code_, u32 start_, Registry& registry_) - : program_code{program_code_}, registry{registry_}, start{start_} {} - - const ProgramCode& program_code; - Registry& registry; - u32 start{}; - std::vector<BlockInfo> block_info; - std::list<u32> inspect_queries; - std::list<Query> queries; - std::unordered_map<u32, u32> registered; - std::set<u32> labels; - std::map<u32, u32> ssy_labels; - std::map<u32, u32> pbk_labels; - std::unordered_map<u32, BlockStack> stacks; - ASTManager* manager{}; -}; - -enum class BlockCollision : u32 { None, Found, Inside }; - -std::pair<BlockCollision, u32> TryGetBlock(CFGRebuildState& state, u32 address) { - const auto& blocks = state.block_info; - for (u32 index = 0; index < blocks.size(); index++) { - if (blocks[index].start == address) { - return {BlockCollision::Found, index}; - } - if (blocks[index].IsInside(address)) { - return {BlockCollision::Inside, index}; - } - } - return {BlockCollision::None, 0xFFFFFFFF}; -} - -struct ParseInfo { - BlockBranchInfo branch_info{}; - u32 end_address{}; -}; - -BlockInfo& CreateBlockInfo(CFGRebuildState& state, u32 start, u32 end) { - auto& it = state.block_info.emplace_back(); - it.start = start; - it.end = end; - const u32 index = static_cast<u32>(state.block_info.size() - 1); - state.registered.insert({start, index}); - return it; -} - -Pred GetPredicate(u32 index, bool negated) { - return static_cast<Pred>(static_cast<u64>(index) + (negated ? 8ULL : 0ULL)); -} - -enum class ParseResult : u32 { - ControlCaught, - BlockEnd, - AbnormalFlow, -}; - -struct BranchIndirectInfo { - u32 buffer{}; - u32 offset{}; - u32 entries{}; - s32 relative_position{}; -}; - -struct BufferInfo { - u32 index; - u32 offset; -}; - -std::optional<std::pair<s32, u64>> GetBRXInfo(const CFGRebuildState& state, u32& pos) { - const Instruction instr = state.program_code[pos]; - const auto opcode = OpCode::Decode(instr); - if (opcode->get().GetId() != OpCode::Id::BRX) { - return std::nullopt; - } - if (instr.brx.constant_buffer != 0) { - return std::nullopt; - } - --pos; - return std::make_pair(instr.brx.GetBranchExtend(), instr.gpr8.Value()); -} - -template <typename Result, typename TestCallable, typename PackCallable> -// requires std::predicate<TestCallable, Instruction, const OpCode::Matcher&> -// requires std::invocable<PackCallable, Instruction, const OpCode::Matcher&> -std::optional<Result> TrackInstruction(const CFGRebuildState& state, u32& pos, TestCallable test, - PackCallable pack) { - for (; pos >= state.start; --pos) { - if (IsSchedInstruction(pos, state.start)) { - continue; - } - const Instruction instr = state.program_code[pos]; - const auto opcode = OpCode::Decode(instr); - if (!opcode) { - continue; - } - if (test(instr, opcode->get())) { - --pos; - return std::make_optional(pack(instr, opcode->get())); - } - } - return std::nullopt; -} - -std::optional<std::pair<BufferInfo, u64>> TrackLDC(const CFGRebuildState& state, u32& pos, - u64 brx_tracked_register) { - return TrackInstruction<std::pair<BufferInfo, u64>>( - state, pos, - [brx_tracked_register](auto instr, const auto& opcode) { - return opcode.GetId() == OpCode::Id::LD_C && - instr.gpr0.Value() == brx_tracked_register && - instr.ld_c.type.Value() == Tegra::Shader::UniformType::Single; - }, - [](auto instr, const auto& opcode) { - const BufferInfo info = {static_cast<u32>(instr.cbuf36.index.Value()), - static_cast<u32>(instr.cbuf36.GetOffset())}; - return std::make_pair(info, instr.gpr8.Value()); - }); -} - -std::optional<u64> TrackSHLRegister(const CFGRebuildState& state, u32& pos, - u64 ldc_tracked_register) { - return TrackInstruction<u64>( - state, pos, - [ldc_tracked_register](auto instr, const auto& opcode) { - return opcode.GetId() == OpCode::Id::SHL_IMM && - instr.gpr0.Value() == ldc_tracked_register; - }, - [](auto instr, const auto&) { return instr.gpr8.Value(); }); -} - -std::optional<u32> TrackIMNMXValue(const CFGRebuildState& state, u32& pos, - u64 shl_tracked_register) { - return TrackInstruction<u32>( - state, pos, - [shl_tracked_register](auto instr, const auto& opcode) { - return opcode.GetId() == OpCode::Id::IMNMX_IMM && - instr.gpr0.Value() == shl_tracked_register; - }, - [](auto instr, const auto&) { - return static_cast<u32>(instr.alu.GetSignedImm20_20() + 1); - }); -} - -std::optional<BranchIndirectInfo> TrackBranchIndirectInfo(const CFGRebuildState& state, u32 pos) { - const auto brx_info = GetBRXInfo(state, pos); - if (!brx_info) { - return std::nullopt; - } - const auto [relative_position, brx_tracked_register] = *brx_info; - - const auto ldc_info = TrackLDC(state, pos, brx_tracked_register); - if (!ldc_info) { - return std::nullopt; - } - const auto [buffer_info, ldc_tracked_register] = *ldc_info; - - const auto shl_tracked_register = TrackSHLRegister(state, pos, ldc_tracked_register); - if (!shl_tracked_register) { - return std::nullopt; - } - - const auto entries = TrackIMNMXValue(state, pos, *shl_tracked_register); - if (!entries) { - return std::nullopt; - } - - return BranchIndirectInfo{buffer_info.index, buffer_info.offset, *entries, relative_position}; -} - -std::pair<ParseResult, ParseInfo> ParseCode(CFGRebuildState& state, u32 address) { - u32 offset = static_cast<u32>(address); - const u32 end_address = static_cast<u32>(state.program_code.size()); - ParseInfo parse_info{}; - SingleBranch single_branch{}; - - const auto insert_label = [](CFGRebuildState& rebuild_state, u32 label_address) { - const auto pair = rebuild_state.labels.emplace(label_address); - if (pair.second) { - rebuild_state.inspect_queries.push_back(label_address); - } - }; - - while (true) { - if (offset >= end_address) { - // ASSERT_OR_EXECUTE can't be used, as it ignores the break - ASSERT_MSG(false, "Shader passed the current limit!"); - - single_branch.address = exit_branch; - single_branch.ignore = false; - break; - } - if (state.registered.contains(offset)) { - single_branch.address = offset; - single_branch.ignore = true; - break; - } - if (IsSchedInstruction(offset, state.start)) { - offset++; - continue; - } - const Instruction instr = {state.program_code[offset]}; - const auto opcode = OpCode::Decode(instr); - if (!opcode || opcode->get().GetType() != OpCode::Type::Flow) { - offset++; - continue; - } - - switch (opcode->get().GetId()) { - case OpCode::Id::EXIT: { - const auto pred_index = static_cast<u32>(instr.pred.pred_index); - single_branch.condition.predicate = GetPredicate(pred_index, instr.negate_pred != 0); - if (single_branch.condition.predicate == Pred::NeverExecute) { - offset++; - continue; - } - const ConditionCode cc = instr.flow_condition_code; - single_branch.condition.cc = cc; - if (cc == ConditionCode::F) { - offset++; - continue; - } - single_branch.address = exit_branch; - single_branch.kill = false; - single_branch.is_sync = false; - single_branch.is_brk = false; - single_branch.ignore = false; - parse_info.end_address = offset; - parse_info.branch_info = MakeBranchInfo<SingleBranch>( - single_branch.condition, single_branch.address, single_branch.kill, - single_branch.is_sync, single_branch.is_brk, single_branch.ignore); - - return {ParseResult::ControlCaught, parse_info}; - } - case OpCode::Id::BRA: { - if (instr.bra.constant_buffer != 0) { - return {ParseResult::AbnormalFlow, parse_info}; - } - const auto pred_index = static_cast<u32>(instr.pred.pred_index); - single_branch.condition.predicate = GetPredicate(pred_index, instr.negate_pred != 0); - if (single_branch.condition.predicate == Pred::NeverExecute) { - offset++; - continue; - } - const ConditionCode cc = instr.flow_condition_code; - single_branch.condition.cc = cc; - if (cc == ConditionCode::F) { - offset++; - continue; - } - const u32 branch_offset = offset + instr.bra.GetBranchTarget(); - if (branch_offset == 0) { - single_branch.address = exit_branch; - } else { - single_branch.address = branch_offset; - } - insert_label(state, branch_offset); - single_branch.kill = false; - single_branch.is_sync = false; - single_branch.is_brk = false; - single_branch.ignore = false; - parse_info.end_address = offset; - parse_info.branch_info = MakeBranchInfo<SingleBranch>( - single_branch.condition, single_branch.address, single_branch.kill, - single_branch.is_sync, single_branch.is_brk, single_branch.ignore); - - return {ParseResult::ControlCaught, parse_info}; - } - case OpCode::Id::SYNC: { - const auto pred_index = static_cast<u32>(instr.pred.pred_index); - single_branch.condition.predicate = GetPredicate(pred_index, instr.negate_pred != 0); - if (single_branch.condition.predicate == Pred::NeverExecute) { - offset++; - continue; - } - const ConditionCode cc = instr.flow_condition_code; - single_branch.condition.cc = cc; - if (cc == ConditionCode::F) { - offset++; - continue; - } - single_branch.address = unassigned_branch; - single_branch.kill = false; - single_branch.is_sync = true; - single_branch.is_brk = false; - single_branch.ignore = false; - parse_info.end_address = offset; - parse_info.branch_info = MakeBranchInfo<SingleBranch>( - single_branch.condition, single_branch.address, single_branch.kill, - single_branch.is_sync, single_branch.is_brk, single_branch.ignore); - - return {ParseResult::ControlCaught, parse_info}; - } - case OpCode::Id::BRK: { - const auto pred_index = static_cast<u32>(instr.pred.pred_index); - single_branch.condition.predicate = GetPredicate(pred_index, instr.negate_pred != 0); - if (single_branch.condition.predicate == Pred::NeverExecute) { - offset++; - continue; - } - const ConditionCode cc = instr.flow_condition_code; - single_branch.condition.cc = cc; - if (cc == ConditionCode::F) { - offset++; - continue; - } - single_branch.address = unassigned_branch; - single_branch.kill = false; - single_branch.is_sync = false; - single_branch.is_brk = true; - single_branch.ignore = false; - parse_info.end_address = offset; - parse_info.branch_info = MakeBranchInfo<SingleBranch>( - single_branch.condition, single_branch.address, single_branch.kill, - single_branch.is_sync, single_branch.is_brk, single_branch.ignore); - - return {ParseResult::ControlCaught, parse_info}; - } - case OpCode::Id::KIL: { - const auto pred_index = static_cast<u32>(instr.pred.pred_index); - single_branch.condition.predicate = GetPredicate(pred_index, instr.negate_pred != 0); - if (single_branch.condition.predicate == Pred::NeverExecute) { - offset++; - continue; - } - const ConditionCode cc = instr.flow_condition_code; - single_branch.condition.cc = cc; - if (cc == ConditionCode::F) { - offset++; - continue; - } - single_branch.address = exit_branch; - single_branch.kill = true; - single_branch.is_sync = false; - single_branch.is_brk = false; - single_branch.ignore = false; - parse_info.end_address = offset; - parse_info.branch_info = MakeBranchInfo<SingleBranch>( - single_branch.condition, single_branch.address, single_branch.kill, - single_branch.is_sync, single_branch.is_brk, single_branch.ignore); - - return {ParseResult::ControlCaught, parse_info}; - } - case OpCode::Id::SSY: { - const u32 target = offset + instr.bra.GetBranchTarget(); - insert_label(state, target); - state.ssy_labels.emplace(offset, target); - break; - } - case OpCode::Id::PBK: { - const u32 target = offset + instr.bra.GetBranchTarget(); - insert_label(state, target); - state.pbk_labels.emplace(offset, target); - break; - } - case OpCode::Id::BRX: { - const auto tmp = TrackBranchIndirectInfo(state, offset); - if (!tmp) { - LOG_WARNING(HW_GPU, "BRX Track Unsuccesful"); - return {ParseResult::AbnormalFlow, parse_info}; - } - - const auto result = *tmp; - const s32 pc_target = offset + result.relative_position; - std::vector<CaseBranch> branches; - for (u32 i = 0; i < result.entries; i++) { - auto key = state.registry.ObtainKey(result.buffer, result.offset + i * 4); - if (!key) { - return {ParseResult::AbnormalFlow, parse_info}; - } - u32 value = *key; - u32 target = static_cast<u32>((value >> 3) + pc_target); - insert_label(state, target); - branches.emplace_back(value, target); - } - parse_info.end_address = offset; - parse_info.branch_info = MakeBranchInfo<MultiBranch>( - static_cast<u32>(instr.gpr8.Value()), std::move(branches)); - - return {ParseResult::ControlCaught, parse_info}; - } - default: - break; - } - - offset++; - } - single_branch.kill = false; - single_branch.is_sync = false; - single_branch.is_brk = false; - parse_info.end_address = offset - 1; - parse_info.branch_info = MakeBranchInfo<SingleBranch>( - single_branch.condition, single_branch.address, single_branch.kill, single_branch.is_sync, - single_branch.is_brk, single_branch.ignore); - return {ParseResult::BlockEnd, parse_info}; -} - -bool TryInspectAddress(CFGRebuildState& state) { - if (state.inspect_queries.empty()) { - return false; - } - - const u32 address = state.inspect_queries.front(); - state.inspect_queries.pop_front(); - const auto [result, block_index] = TryGetBlock(state, address); - switch (result) { - case BlockCollision::Found: { - return true; - } - case BlockCollision::Inside: { - // This case is the tricky one: - // We need to split the block into 2 separate blocks - const u32 end = state.block_info[block_index].end; - BlockInfo& new_block = CreateBlockInfo(state, address, end); - BlockInfo& current_block = state.block_info[block_index]; - current_block.end = address - 1; - new_block.branch = std::move(current_block.branch); - BlockBranchInfo forward_branch = MakeBranchInfo<SingleBranch>(); - const auto branch = std::get_if<SingleBranch>(forward_branch.get()); - branch->address = address; - branch->ignore = true; - current_block.branch = std::move(forward_branch); - return true; - } - default: - break; - } - const auto [parse_result, parse_info] = ParseCode(state, address); - if (parse_result == ParseResult::AbnormalFlow) { - // if it's AbnormalFlow, we end it as false, ending the CFG reconstruction - return false; - } - - BlockInfo& block_info = CreateBlockInfo(state, address, parse_info.end_address); - block_info.branch = parse_info.branch_info; - if (std::holds_alternative<SingleBranch>(*block_info.branch)) { - const auto branch = std::get_if<SingleBranch>(block_info.branch.get()); - if (branch->condition.IsUnconditional()) { - return true; - } - const u32 fallthrough_address = parse_info.end_address + 1; - state.inspect_queries.push_front(fallthrough_address); - return true; - } - return true; -} - -bool TryQuery(CFGRebuildState& state) { - const auto gather_labels = [](std::stack<u32>& cc, std::map<u32, u32>& labels, - BlockInfo& block) { - auto gather_start = labels.lower_bound(block.start); - const auto gather_end = labels.upper_bound(block.end); - while (gather_start != gather_end) { - cc.push(gather_start->second); - ++gather_start; - } - }; - if (state.queries.empty()) { - return false; - } - - Query& q = state.queries.front(); - const u32 block_index = state.registered[q.address]; - BlockInfo& block = state.block_info[block_index]; - // If the block is visited, check if the stacks match, else gather the ssy/pbk - // labels into the current stack and look if the branch at the end of the block - // consumes a label. Schedule new queries accordingly - if (block.visited) { - BlockStack& stack = state.stacks[q.address]; - const bool all_okay = (stack.ssy_stack.empty() || q.ssy_stack == stack.ssy_stack) && - (stack.pbk_stack.empty() || q.pbk_stack == stack.pbk_stack); - state.queries.pop_front(); - return all_okay; - } - block.visited = true; - state.stacks.insert_or_assign(q.address, BlockStack{q}); - - Query q2(q); - state.queries.pop_front(); - gather_labels(q2.ssy_stack, state.ssy_labels, block); - gather_labels(q2.pbk_stack, state.pbk_labels, block); - if (std::holds_alternative<SingleBranch>(*block.branch)) { - auto* branch = std::get_if<SingleBranch>(block.branch.get()); - if (!branch->condition.IsUnconditional()) { - q2.address = block.end + 1; - state.queries.push_back(q2); - } - - auto& conditional_query = state.queries.emplace_back(q2); - if (branch->is_sync) { - if (branch->address == unassigned_branch) { - branch->address = conditional_query.ssy_stack.top(); - } - conditional_query.ssy_stack.pop(); - } - if (branch->is_brk) { - if (branch->address == unassigned_branch) { - branch->address = conditional_query.pbk_stack.top(); - } - conditional_query.pbk_stack.pop(); - } - conditional_query.address = branch->address; - return true; - } - - const auto* multi_branch = std::get_if<MultiBranch>(block.branch.get()); - for (const auto& branch_case : multi_branch->branches) { - auto& conditional_query = state.queries.emplace_back(q2); - conditional_query.address = branch_case.address; - } - - return true; -} - -void InsertBranch(ASTManager& mm, const BlockBranchInfo& branch_info) { - const auto get_expr = [](const Condition& cond) -> Expr { - Expr result; - if (cond.cc != ConditionCode::T) { - result = MakeExpr<ExprCondCode>(cond.cc); - } - if (cond.predicate != Pred::UnusedIndex) { - u32 pred = static_cast<u32>(cond.predicate); - bool negate = false; - if (pred > 7) { - negate = true; - pred -= 8; - } - Expr extra = MakeExpr<ExprPredicate>(pred); - if (negate) { - extra = MakeExpr<ExprNot>(std::move(extra)); - } - if (result) { - return MakeExpr<ExprAnd>(std::move(extra), std::move(result)); - } - return extra; - } - if (result) { - return result; - } - return MakeExpr<ExprBoolean>(true); - }; - - if (std::holds_alternative<SingleBranch>(*branch_info)) { - const auto* branch = std::get_if<SingleBranch>(branch_info.get()); - if (branch->address < 0) { - if (branch->kill) { - mm.InsertReturn(get_expr(branch->condition), true); - return; - } - mm.InsertReturn(get_expr(branch->condition), false); - return; - } - mm.InsertGoto(get_expr(branch->condition), branch->address); - return; - } - const auto* multi_branch = std::get_if<MultiBranch>(branch_info.get()); - for (const auto& branch_case : multi_branch->branches) { - mm.InsertGoto(MakeExpr<ExprGprEqual>(multi_branch->gpr, branch_case.cmp_value), - branch_case.address); - } -} - -void DecompileShader(CFGRebuildState& state) { - state.manager->Init(); - for (auto label : state.labels) { - state.manager->DeclareLabel(label); - } - for (const auto& block : state.block_info) { - if (state.labels.contains(block.start)) { - state.manager->InsertLabel(block.start); - } - const bool ignore = BlockBranchIsIgnored(block.branch); - const u32 end = ignore ? block.end + 1 : block.end; - state.manager->InsertBlock(block.start, end); - if (!ignore) { - InsertBranch(*state.manager, block.branch); - } - } - state.manager->Decompile(); -} - -} // Anonymous namespace - -std::unique_ptr<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code, u32 start_address, - const CompilerSettings& settings, - Registry& registry) { - auto result_out = std::make_unique<ShaderCharacteristics>(); - if (settings.depth == CompileDepth::BruteForce) { - result_out->settings.depth = CompileDepth::BruteForce; - return result_out; - } - - CFGRebuildState state{program_code, start_address, registry}; - // Inspect Code and generate blocks - state.labels.clear(); - state.labels.emplace(start_address); - state.inspect_queries.push_back(state.start); - while (!state.inspect_queries.empty()) { - if (!TryInspectAddress(state)) { - result_out->settings.depth = CompileDepth::BruteForce; - return result_out; - } - } - - bool use_flow_stack = true; - - bool decompiled = false; - - if (settings.depth != CompileDepth::FlowStack) { - // Decompile Stacks - state.queries.push_back(Query{state.start, {}, {}}); - decompiled = true; - while (!state.queries.empty()) { - if (!TryQuery(state)) { - decompiled = false; - break; - } - } - } - - use_flow_stack = !decompiled; - - // Sort and organize results - std::sort(state.block_info.begin(), state.block_info.end(), - [](const BlockInfo& a, const BlockInfo& b) -> bool { return a.start < b.start; }); - if (decompiled && settings.depth != CompileDepth::NoFlowStack) { - ASTManager manager{settings.depth != CompileDepth::DecompileBackwards, - settings.disable_else_derivation}; - state.manager = &manager; - DecompileShader(state); - decompiled = state.manager->IsFullyDecompiled(); - if (!decompiled) { - if (settings.depth == CompileDepth::FullDecompile) { - LOG_CRITICAL(HW_GPU, "Failed to remove all the gotos!:"); - } else { - LOG_CRITICAL(HW_GPU, "Failed to remove all backward gotos!:"); - } - state.manager->ShowCurrentState("Of Shader"); - state.manager->Clear(); - } else { - auto characteristics = std::make_unique<ShaderCharacteristics>(); - characteristics->start = start_address; - characteristics->settings.depth = settings.depth; - characteristics->manager = std::move(manager); - characteristics->end = state.block_info.back().end + 1; - return characteristics; - } - } - - result_out->start = start_address; - result_out->settings.depth = - use_flow_stack ? CompileDepth::FlowStack : CompileDepth::NoFlowStack; - result_out->blocks.clear(); - for (auto& block : state.block_info) { - ShaderBlock new_block{}; - new_block.start = block.start; - new_block.end = block.end; - new_block.ignore_branch = BlockBranchIsIgnored(block.branch); - if (!new_block.ignore_branch) { - new_block.branch = block.branch; - } - result_out->end = std::max(result_out->end, block.end); - result_out->blocks.push_back(new_block); - } - if (!use_flow_stack) { - result_out->labels = std::move(state.labels); - return result_out; - } - - auto back = result_out->blocks.begin(); - auto next = std::next(back); - while (next != result_out->blocks.end()) { - if (!state.labels.contains(next->start) && next->start == back->end + 1) { - back->end = next->end; - next = result_out->blocks.erase(next); - continue; - } - back = next; - ++next; - } - - return result_out; -} -} // namespace VideoCommon::Shader |