diff --git a/src/shader_recompiler/CMakeLists.txt b/src/shader_recompiler/CMakeLists.txt index 27fc79e21b..e1f4276a15 100644 --- a/src/shader_recompiler/CMakeLists.txt +++ b/src/shader_recompiler/CMakeLists.txt @@ -32,6 +32,8 @@ add_executable(shader_recompiler frontend/ir/opcodes.cpp frontend/ir/opcodes.h frontend/ir/opcodes.inc + frontend/ir/post_order.cpp + frontend/ir/post_order.h frontend/ir/pred.h frontend/ir/program.cpp frontend/ir/program.h diff --git a/src/shader_recompiler/backend/spirv/emit_spirv.h b/src/shader_recompiler/backend/spirv/emit_spirv.h index 46ec7a1bb8..6b09757d12 100644 --- a/src/shader_recompiler/backend/spirv/emit_spirv.h +++ b/src/shader_recompiler/backend/spirv/emit_spirv.h @@ -159,10 +159,10 @@ private: Id EmitWorkgroupId(EmitContext& ctx); Id EmitLocalInvocationId(EmitContext& ctx); Id EmitUndefU1(EmitContext& ctx); - void EmitUndefU8(EmitContext& ctx); - void EmitUndefU16(EmitContext& ctx); - void EmitUndefU32(EmitContext& ctx); - void EmitUndefU64(EmitContext& ctx); + Id EmitUndefU8(EmitContext& ctx); + Id EmitUndefU16(EmitContext& ctx); + Id EmitUndefU32(EmitContext& ctx); + Id EmitUndefU64(EmitContext& ctx); void EmitLoadGlobalU8(EmitContext& ctx); void EmitLoadGlobalS8(EmitContext& ctx); void EmitLoadGlobalU16(EmitContext& ctx); @@ -297,12 +297,12 @@ private: void EmitBitFieldInsert(EmitContext& ctx); void EmitBitFieldSExtract(EmitContext& ctx); Id EmitBitFieldUExtract(EmitContext& ctx, Id base, Id offset, Id count); - void EmitSLessThan(EmitContext& ctx); + Id EmitSLessThan(EmitContext& ctx, Id lhs, Id rhs); void EmitULessThan(EmitContext& ctx); void EmitIEqual(EmitContext& ctx); void EmitSLessThanEqual(EmitContext& ctx); void EmitULessThanEqual(EmitContext& ctx); - void EmitSGreaterThan(EmitContext& ctx); + Id EmitSGreaterThan(EmitContext& ctx, Id lhs, Id rhs); void EmitUGreaterThan(EmitContext& ctx); void EmitINotEqual(EmitContext& ctx); void EmitSGreaterThanEqual(EmitContext& ctx); diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_integer.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_integer.cpp index 3ef4f3d787..e811a63ab3 100644 --- a/src/shader_recompiler/backend/spirv/emit_spirv_integer.cpp +++ b/src/shader_recompiler/backend/spirv/emit_spirv_integer.cpp @@ -73,8 +73,8 @@ Id EmitSPIRV::EmitBitFieldUExtract(EmitContext& ctx, Id base, Id offset, Id coun return ctx.OpBitFieldUExtract(ctx.u32[1], base, offset, count); } -void EmitSPIRV::EmitSLessThan(EmitContext&) { - throw NotImplementedException("SPIR-V Instruction"); +Id EmitSPIRV::EmitSLessThan(EmitContext& ctx, Id lhs, Id rhs) { + return ctx.OpSLessThan(ctx.u1, lhs, rhs); } void EmitSPIRV::EmitULessThan(EmitContext&) { @@ -93,8 +93,8 @@ void EmitSPIRV::EmitULessThanEqual(EmitContext&) { throw NotImplementedException("SPIR-V Instruction"); } -void EmitSPIRV::EmitSGreaterThan(EmitContext&) { - throw NotImplementedException("SPIR-V Instruction"); +Id EmitSPIRV::EmitSGreaterThan(EmitContext& ctx, Id lhs, Id rhs) { + return ctx.OpSGreaterThan(ctx.u1, lhs, rhs); } void EmitSPIRV::EmitUGreaterThan(EmitContext&) { diff --git a/src/shader_recompiler/backend/spirv/emit_spirv_undefined.cpp b/src/shader_recompiler/backend/spirv/emit_spirv_undefined.cpp index 859b60a95d..a6f542360c 100644 --- a/src/shader_recompiler/backend/spirv/emit_spirv_undefined.cpp +++ b/src/shader_recompiler/backend/spirv/emit_spirv_undefined.cpp @@ -10,19 +10,19 @@ Id EmitSPIRV::EmitUndefU1(EmitContext& ctx) { return ctx.OpUndef(ctx.u1); } -void EmitSPIRV::EmitUndefU8(EmitContext&) { +Id EmitSPIRV::EmitUndefU8(EmitContext&) { throw NotImplementedException("SPIR-V Instruction"); } -void EmitSPIRV::EmitUndefU16(EmitContext&) { +Id EmitSPIRV::EmitUndefU16(EmitContext&) { throw NotImplementedException("SPIR-V Instruction"); } -void EmitSPIRV::EmitUndefU32(EmitContext&) { - throw NotImplementedException("SPIR-V Instruction"); +Id EmitSPIRV::EmitUndefU32(EmitContext& ctx) { + return ctx.OpUndef(ctx.u32[1]); } -void EmitSPIRV::EmitUndefU64(EmitContext&) { +Id EmitSPIRV::EmitUndefU64(EmitContext&) { throw NotImplementedException("SPIR-V Instruction"); } diff --git a/src/shader_recompiler/frontend/ir/function.h b/src/shader_recompiler/frontend/ir/function.h index fd7d564191..d1f0611467 100644 --- a/src/shader_recompiler/frontend/ir/function.h +++ b/src/shader_recompiler/frontend/ir/function.h @@ -12,6 +12,7 @@ namespace Shader::IR { struct Function { BlockList blocks; + BlockList post_order_blocks; }; } // namespace Shader::IR diff --git a/src/shader_recompiler/frontend/ir/post_order.cpp b/src/shader_recompiler/frontend/ir/post_order.cpp new file mode 100644 index 0000000000..a48b8dec5a --- /dev/null +++ b/src/shader_recompiler/frontend/ir/post_order.cpp @@ -0,0 +1,48 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#include +#include + +#include "shader_recompiler/frontend/ir/basic_block.h" +#include "shader_recompiler/frontend/ir/post_order.h" + +namespace Shader::IR { + +BlockList PostOrder(const BlockList& blocks) { + boost::container::small_vector block_stack; + boost::container::flat_set visited; + + BlockList post_order_blocks; + post_order_blocks.reserve(blocks.size()); + + Block* const first_block{blocks.front()}; + visited.insert(first_block); + block_stack.push_back(first_block); + + const auto visit_branch = [&](Block* block, Block* branch) { + if (!branch) { + return false; + } + if (!visited.insert(branch).second) { + return false; + } + // Calling push_back twice is faster than insert on msvc + block_stack.push_back(block); + block_stack.push_back(branch); + return true; + }; + while (!block_stack.empty()) { + Block* const block{block_stack.back()}; + block_stack.pop_back(); + + if (!visit_branch(block, block->TrueBranch()) && + !visit_branch(block, block->FalseBranch())) { + post_order_blocks.push_back(block); + } + } + return post_order_blocks; +} + +} // namespace Shader::IR diff --git a/src/shader_recompiler/frontend/ir/post_order.h b/src/shader_recompiler/frontend/ir/post_order.h new file mode 100644 index 0000000000..30137ff57a --- /dev/null +++ b/src/shader_recompiler/frontend/ir/post_order.h @@ -0,0 +1,13 @@ +// Copyright 2021 yuzu Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include "shader_recompiler/frontend/ir/basic_block.h" + +namespace Shader::IR { + +BlockList PostOrder(const BlockList& blocks); + +} // namespace Shader::IR diff --git a/src/shader_recompiler/frontend/maxwell/program.cpp b/src/shader_recompiler/frontend/maxwell/program.cpp index 9fa912ed8e..dab6d68c02 100644 --- a/src/shader_recompiler/frontend/maxwell/program.cpp +++ b/src/shader_recompiler/frontend/maxwell/program.cpp @@ -7,6 +7,7 @@ #include #include "shader_recompiler/frontend/ir/basic_block.h" +#include "shader_recompiler/frontend/ir/post_order.h" #include "shader_recompiler/frontend/ir/structured_control_flow.h" #include "shader_recompiler/frontend/maxwell/program.h" #include "shader_recompiler/frontend/maxwell/translate/translate.h" @@ -56,11 +57,14 @@ IR::Program TranslateProgram(ObjectPool& inst_pool, ObjectPool + #include "shader_recompiler/frontend/ir/basic_block.h" #include "shader_recompiler/frontend/ir/function.h" namespace Shader::Optimization { template -void Invoke(Func&& func, IR::Function& function) { - for (const auto& block : function.blocks) { +void PostOrderInvoke(Func&& func, IR::Function& function) { + for (const auto& block : function.post_order_blocks) { func(*block); } } @@ -20,7 +22,7 @@ void ConstantPropagationPass(IR::Block& block); void DeadCodeEliminationPass(IR::Block& block); void GlobalMemoryToStorageBufferPass(IR::Block& block); void IdentityRemovalPass(IR::Function& function); -void SsaRewritePass(IR::Function& function); +void SsaRewritePass(std::span post_order_blocks); void VerificationPass(const IR::Function& function); } // namespace Shader::Optimization diff --git a/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp b/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp index 7eaf719c4e..13f9c914a2 100644 --- a/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp +++ b/src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp @@ -14,7 +14,13 @@ // https://link.springer.com/chapter/10.1007/978-3-642-37051-9_6 // +#include +#include +#include +#include + #include +#include #include "shader_recompiler/frontend/ir/basic_block.h" #include "shader_recompiler/frontend/ir/function.h" @@ -26,9 +32,9 @@ namespace Shader::Optimization { namespace { -using ValueMap = boost::container::flat_map>; - -struct FlagTag {}; +struct FlagTag { + auto operator<=>(const FlagTag&) const noexcept = default; +}; struct ZeroFlagTag : FlagTag {}; struct SignFlagTag : FlagTag {}; struct CarryFlagTag : FlagTag {}; @@ -38,9 +44,15 @@ struct GotoVariable : FlagTag { GotoVariable() = default; explicit GotoVariable(u32 index_) : index{index_} {} + auto operator<=>(const GotoVariable&) const noexcept = default; + u32 index; }; +using Variant = std::variant; +using ValueMap = boost::container::flat_map>; + struct DefTable { [[nodiscard]] ValueMap& operator[](IR::Reg variable) noexcept { return regs[IR::RegIndex(variable)]; @@ -102,19 +114,35 @@ public: } IR::Value ReadVariable(auto variable, IR::Block* block) { - auto& def{current_def[variable]}; + const ValueMap& def{current_def[variable]}; if (const auto it{def.find(block)}; it != def.end()) { return it->second; } return ReadVariableRecursive(variable, block); } + void SealBlock(IR::Block* block) { + const auto it{incomplete_phis.find(block)}; + if (it != incomplete_phis.end()) { + for (auto& [variant, phi] : it->second) { + std::visit([&](auto& variable) { AddPhiOperands(variable, *phi, block); }, variant); + } + } + sealed_blocks.insert(block); + } + private: IR::Value ReadVariableRecursive(auto variable, IR::Block* block) { IR::Value val; - if (const std::span preds{block->ImmediatePredecessors()}; preds.size() == 1) { + if (!sealed_blocks.contains(block)) { + // Incomplete CFG + IR::Inst* phi{&*block->PrependNewInst(block->begin(), IR::Opcode::Phi)}; + incomplete_phis[block].insert_or_assign(variable, phi); + val = IR::Value{&*phi}; + } else if (const std::span imm_preds{block->ImmediatePredecessors()}; + imm_preds.size() == 1) { // Optimize the common case of one predecessor: no phi needed - val = ReadVariable(variable, preds.front()); + val = ReadVariable(variable, imm_preds.front()); } else { // Break potential cycles with operandless phi IR::Inst& phi_inst{*block->PrependNewInst(block->begin(), IR::Opcode::Phi)}; @@ -127,8 +155,8 @@ private: } IR::Value AddPhiOperands(auto variable, IR::Inst& phi, IR::Block* block) { - for (IR::Block* const pred : block->ImmediatePredecessors()) { - phi.AddPhiOperand(pred, ReadVariable(variable, pred)); + for (IR::Block* const imm_pred : block->ImmediatePredecessors()) { + phi.AddPhiOperand(imm_pred, ReadVariable(variable, imm_pred)); } return TryRemoveTrivialPhi(phi, block, UndefOpcode(variable)); } @@ -159,6 +187,9 @@ private: return same; } + boost::container::flat_set sealed_blocks; + boost::container::flat_map> + incomplete_phis; DefTable current_def; }; @@ -218,14 +249,19 @@ void VisitInst(Pass& pass, IR::Block* block, IR::Inst& inst) { break; } } + +void VisitBlock(Pass& pass, IR::Block* block) { + for (IR::Inst& inst : block->Instructions()) { + VisitInst(pass, block, inst); + } + pass.SealBlock(block); +} } // Anonymous namespace -void SsaRewritePass(IR::Function& function) { +void SsaRewritePass(std::span post_order_blocks) { Pass pass; - for (IR::Block* const block : function.blocks) { - for (IR::Inst& inst : block->Instructions()) { - VisitInst(pass, block, inst); - } + for (IR::Block* const block : post_order_blocks | std::views::reverse) { + VisitBlock(pass, block); } } diff --git a/src/shader_recompiler/main.cpp b/src/shader_recompiler/main.cpp index 92358232c3..29f65966c3 100644 --- a/src/shader_recompiler/main.cpp +++ b/src/shader_recompiler/main.cpp @@ -69,14 +69,12 @@ int main() { // FileEnvironment env{"D:\\Shaders\\Database\\Oninaki\\CS8F146B41DB6BD826.bin"}; FileEnvironment env{"D:\\Shaders\\shader.bin"}; - for (int i = 0; i < 1; ++i) { - block_pool->ReleaseContents(); - inst_pool->ReleaseContents(); - flow_block_pool->ReleaseContents(); - Flow::CFG cfg{env, *flow_block_pool, 0}; - fmt::print(stdout, "{}\n", cfg.Dot()); - IR::Program program{TranslateProgram(*inst_pool, *block_pool, env, cfg)}; - fmt::print(stdout, "{}\n", IR::DumpProgram(program)); - Backend::SPIRV::EmitSPIRV spirv{program}; - } + block_pool->ReleaseContents(); + inst_pool->ReleaseContents(); + flow_block_pool->ReleaseContents(); + Flow::CFG cfg{env, *flow_block_pool, 0}; + fmt::print(stdout, "{}\n", cfg.Dot()); + IR::Program program{TranslateProgram(*inst_pool, *block_pool, env, cfg)}; + fmt::print(stdout, "{}\n", IR::DumpProgram(program)); + // Backend::SPIRV::EmitSPIRV spirv{program}; }