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shader: Initial implementation of an AST

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This commit is contained in:
ReinUsesLisp 2021-02-11 16:39:06 -03:00 committed by ameerj
parent 2930dccecc
commit 9170200a11
33 changed files with 1347 additions and 591 deletions
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2
externals/sirit vendored

@ -1 +1 @@
Subproject commit 1f7b70730d610cfbd5099ab93dd38ec8a78e7e35 Subproject commit c374bfd9fdff02a0cff85d005488967b1b0f675e

4
src/shader_recompiler/CMakeLists.txt
View file

@ -36,6 +36,8 @@ add_executable(shader_recompiler
frontend/ir/program.cpp frontend/ir/program.cpp
frontend/ir/program.h frontend/ir/program.h
frontend/ir/reg.h frontend/ir/reg.h
frontend/ir/structured_control_flow.cpp
frontend/ir/structured_control_flow.h
frontend/ir/type.cpp frontend/ir/type.cpp
frontend/ir/type.h frontend/ir/type.h
frontend/ir/value.cpp frontend/ir/value.cpp
@ -51,8 +53,6 @@ add_executable(shader_recompiler
frontend/maxwell/opcodes.h frontend/maxwell/opcodes.h
frontend/maxwell/program.cpp frontend/maxwell/program.cpp
frontend/maxwell/program.h frontend/maxwell/program.h
frontend/maxwell/termination_code.cpp
frontend/maxwell/termination_code.h
frontend/maxwell/translate/impl/common_encoding.h frontend/maxwell/translate/impl/common_encoding.h
frontend/maxwell/translate/impl/floating_point_add.cpp frontend/maxwell/translate/impl/floating_point_add.cpp
frontend/maxwell/translate/impl/floating_point_conversion_integer.cpp frontend/maxwell/translate/impl/floating_point_conversion_integer.cpp

45
src/shader_recompiler/backend/spirv/emit_spirv.cpp
View file

@ -105,8 +105,26 @@ void EmitSPIRV::EmitInst(EmitContext& ctx, IR::Inst* inst) {
throw LogicError("Invalid opcode {}", inst->Opcode()); throw LogicError("Invalid opcode {}", inst->Opcode());
} }
void EmitSPIRV::EmitPhi(EmitContext&) { static Id TypeId(const EmitContext& ctx, IR::Type type) {
throw NotImplementedException("SPIR-V Instruction"); switch (type) {
case IR::Type::U1:
return ctx.u1;
default:
throw NotImplementedException("Phi node type {}", type);
}
}
Id EmitSPIRV::EmitPhi(EmitContext& ctx, IR::Inst* inst) {
const size_t num_args{inst->NumArgs()};
boost::container::small_vector<Id, 64> operands;
operands.reserve(num_args * 2);
for (size_t index = 0; index < num_args; ++index) {
IR::Block* const phi_block{inst->PhiBlock(index)};
operands.push_back(ctx.Def(inst->Arg(index)));
operands.push_back(ctx.BlockLabel(phi_block));
}
const Id result_type{TypeId(ctx, inst->Arg(0).Type())};
return ctx.OpPhi(result_type, std::span(operands.data(), operands.size()));
} }
void EmitSPIRV::EmitVoid(EmitContext&) {} void EmitSPIRV::EmitVoid(EmitContext&) {}
@ -115,6 +133,29 @@ void EmitSPIRV::EmitIdentity(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction"); throw NotImplementedException("SPIR-V Instruction");
} }
// FIXME: Move to its own file
void EmitSPIRV::EmitBranch(EmitContext& ctx, IR::Inst* inst) {
ctx.OpBranch(ctx.BlockLabel(inst->Arg(0).Label()));
}
void EmitSPIRV::EmitBranchConditional(EmitContext& ctx, IR::Inst* inst) {
ctx.OpBranchConditional(ctx.Def(inst->Arg(0)), ctx.BlockLabel(inst->Arg(1).Label()),
ctx.BlockLabel(inst->Arg(2).Label()));
}
void EmitSPIRV::EmitLoopMerge(EmitContext& ctx, IR::Inst* inst) {
ctx.OpLoopMerge(ctx.BlockLabel(inst->Arg(0).Label()), ctx.BlockLabel(inst->Arg(1).Label()),
spv::LoopControlMask::MaskNone);
}
void EmitSPIRV::EmitSelectionMerge(EmitContext& ctx, IR::Inst* inst) {
ctx.OpSelectionMerge(ctx.BlockLabel(inst->Arg(0).Label()), spv::SelectionControlMask::MaskNone);
}
void EmitSPIRV::EmitReturn(EmitContext& ctx) {
ctx.OpReturn();
}
void EmitSPIRV::EmitGetZeroFromOp(EmitContext&) { void EmitSPIRV::EmitGetZeroFromOp(EmitContext&) {
throw LogicError("Unreachable instruction"); throw LogicError("Unreachable instruction");
} }

18
src/shader_recompiler/backend/spirv/emit_spirv.h
View file

@ -124,18 +124,20 @@ private:
void EmitInst(EmitContext& ctx, IR::Inst* inst); void EmitInst(EmitContext& ctx, IR::Inst* inst);
// Microinstruction emitters // Microinstruction emitters
void EmitPhi(EmitContext& ctx); Id EmitPhi(EmitContext& ctx, IR::Inst* inst);
void EmitVoid(EmitContext& ctx); void EmitVoid(EmitContext& ctx);
void EmitIdentity(EmitContext& ctx); void EmitIdentity(EmitContext& ctx);
void EmitBranch(EmitContext& ctx, IR::Inst* inst); void EmitBranch(EmitContext& ctx, IR::Inst* inst);
void EmitBranchConditional(EmitContext& ctx, IR::Inst* inst); void EmitBranchConditional(EmitContext& ctx, IR::Inst* inst);
void EmitExit(EmitContext& ctx); void EmitLoopMerge(EmitContext& ctx, IR::Inst* inst);
void EmitSelectionMerge(EmitContext& ctx, IR::Inst* inst);
void EmitReturn(EmitContext& ctx); void EmitReturn(EmitContext& ctx);
void EmitUnreachable(EmitContext& ctx);
void EmitGetRegister(EmitContext& ctx); void EmitGetRegister(EmitContext& ctx);
void EmitSetRegister(EmitContext& ctx); void EmitSetRegister(EmitContext& ctx);
void EmitGetPred(EmitContext& ctx); void EmitGetPred(EmitContext& ctx);
void EmitSetPred(EmitContext& ctx); void EmitSetPred(EmitContext& ctx);
void EmitSetGotoVariable(EmitContext& ctx);
void EmitGetGotoVariable(EmitContext& ctx);
Id EmitGetCbuf(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset); Id EmitGetCbuf(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset);
void EmitGetAttribute(EmitContext& ctx); void EmitGetAttribute(EmitContext& ctx);
void EmitSetAttribute(EmitContext& ctx); void EmitSetAttribute(EmitContext& ctx);
@ -151,11 +153,11 @@ private:
void EmitSetOFlag(EmitContext& ctx); void EmitSetOFlag(EmitContext& ctx);
Id EmitWorkgroupId(EmitContext& ctx); Id EmitWorkgroupId(EmitContext& ctx);
Id EmitLocalInvocationId(EmitContext& ctx); Id EmitLocalInvocationId(EmitContext& ctx);
void EmitUndef1(EmitContext& ctx); Id EmitUndefU1(EmitContext& ctx);
void EmitUndef8(EmitContext& ctx); void EmitUndefU8(EmitContext& ctx);
void EmitUndef16(EmitContext& ctx); void EmitUndefU16(EmitContext& ctx);
void EmitUndef32(EmitContext& ctx); void EmitUndefU32(EmitContext& ctx);
void EmitUndef64(EmitContext& ctx); void EmitUndefU64(EmitContext& ctx);
void EmitLoadGlobalU8(EmitContext& ctx); void EmitLoadGlobalU8(EmitContext& ctx);
void EmitLoadGlobalS8(EmitContext& ctx); void EmitLoadGlobalS8(EmitContext& ctx);
void EmitLoadGlobalU16(EmitContext& ctx); void EmitLoadGlobalU16(EmitContext& ctx);

8
src/shader_recompiler/backend/spirv/emit_spirv_context_get_set.cpp
View file

@ -22,6 +22,14 @@ void EmitSPIRV::EmitSetPred(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction"); throw NotImplementedException("SPIR-V Instruction");
} }
void EmitSPIRV::EmitSetGotoVariable(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSPIRV::EmitGetGotoVariable(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
Id EmitSPIRV::EmitGetCbuf(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset) { Id EmitSPIRV::EmitGetCbuf(EmitContext& ctx, const IR::Value& binding, const IR::Value& offset) {
if (!binding.IsImmediate()) { if (!binding.IsImmediate()) {
throw NotImplementedException("Constant buffer indexing"); throw NotImplementedException("Constant buffer indexing");

25
src/shader_recompiler/backend/spirv/emit_spirv_control_flow.cpp
View file

@ -3,28 +3,3 @@
// Refer to the license.txt file included. // Refer to the license.txt file included.
#include "shader_recompiler/backend/spirv/emit_spirv.h" #include "shader_recompiler/backend/spirv/emit_spirv.h"
namespace Shader::Backend::SPIRV {
void EmitSPIRV::EmitBranch(EmitContext& ctx, IR::Inst* inst) {
ctx.OpBranch(ctx.BlockLabel(inst->Arg(0).Label()));
}
void EmitSPIRV::EmitBranchConditional(EmitContext& ctx, IR::Inst* inst) {
ctx.OpBranchConditional(ctx.Def(inst->Arg(0)), ctx.BlockLabel(inst->Arg(1).Label()),
ctx.BlockLabel(inst->Arg(2).Label()));
}
void EmitSPIRV::EmitExit(EmitContext& ctx) {
ctx.OpReturn();
}
void EmitSPIRV::EmitReturn(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSPIRV::EmitUnreachable(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
} // namespace Shader::Backend::SPIRV

16
src/shader_recompiler/backend/spirv/emit_spirv_undefined.cpp
View file

@ -6,23 +6,23 @@
namespace Shader::Backend::SPIRV { namespace Shader::Backend::SPIRV {
void EmitSPIRV::EmitUndef1(EmitContext&) { Id EmitSPIRV::EmitUndefU1(EmitContext& ctx) {
return ctx.OpUndef(ctx.u1);
}
void EmitSPIRV::EmitUndefU8(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction"); throw NotImplementedException("SPIR-V Instruction");
} }
void EmitSPIRV::EmitUndef8(EmitContext&) { void EmitSPIRV::EmitUndefU16(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction"); throw NotImplementedException("SPIR-V Instruction");
} }
void EmitSPIRV::EmitUndef16(EmitContext&) { void EmitSPIRV::EmitUndefU32(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction"); throw NotImplementedException("SPIR-V Instruction");
} }
void EmitSPIRV::EmitUndef32(EmitContext&) { void EmitSPIRV::EmitUndefU64(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction");
}
void EmitSPIRV::EmitUndef64(EmitContext&) {
throw NotImplementedException("SPIR-V Instruction"); throw NotImplementedException("SPIR-V Instruction");
} }

56
src/shader_recompiler/frontend/ir/basic_block.cpp
View file

@ -17,6 +17,8 @@ namespace Shader::IR {
Block::Block(ObjectPool<Inst>& inst_pool_, u32 begin, u32 end) Block::Block(ObjectPool<Inst>& inst_pool_, u32 begin, u32 end)
: inst_pool{&inst_pool_}, location_begin{begin}, location_end{end} {} : inst_pool{&inst_pool_}, location_begin{begin}, location_end{end} {}
Block::Block(ObjectPool<Inst>& inst_pool_) : Block{inst_pool_, 0, 0} {}
Block::~Block() = default; Block::~Block() = default;
void Block::AppendNewInst(Opcode op, std::initializer_list<Value> args) { void Block::AppendNewInst(Opcode op, std::initializer_list<Value> args) {
@ -38,8 +40,25 @@ Block::iterator Block::PrependNewInst(iterator insertion_point, Opcode op,
return result_it; return result_it;
} }
void Block::AddImmediatePredecessor(IR::Block* immediate_predecessor) { void Block::SetBranches(Condition cond, Block* branch_true_, Block* branch_false_) {
imm_predecessors.push_back(immediate_predecessor); branch_cond = cond;
branch_true = branch_true_;
branch_false = branch_false_;
}
void Block::SetBranch(Block* branch) {
branch_cond = Condition{true};
branch_true = branch;
}
void Block::SetReturn() {
branch_cond = Condition{true};
branch_true = nullptr;
branch_false = nullptr;
}
bool Block::IsVirtual() const noexcept {
return location_begin == location_end;
} }
u32 Block::LocationBegin() const noexcept { u32 Block::LocationBegin() const noexcept {
@ -58,6 +77,12 @@ const Block::InstructionList& Block::Instructions() const noexcept {
return instructions; return instructions;
} }
void Block::AddImmediatePredecessor(Block* block) {
if (std::ranges::find(imm_predecessors, block) == imm_predecessors.end()) {
imm_predecessors.push_back(block);
}
}
std::span<IR::Block* const> Block::ImmediatePredecessors() const noexcept { std::span<IR::Block* const> Block::ImmediatePredecessors() const noexcept {
return imm_predecessors; return imm_predecessors;
} }
@ -70,8 +95,17 @@ static std::string BlockToIndex(const std::map<const Block*, size_t>& block_to_i
return fmt::format("$<unknown block {:016x}>", reinterpret_cast<u64>(block)); return fmt::format("$<unknown block {:016x}>", reinterpret_cast<u64>(block));
} }
static size_t InstIndex(std::map<const Inst*, size_t>& inst_to_index, size_t& inst_index,
const Inst* inst) {
const auto [it, is_inserted]{inst_to_index.emplace(inst, inst_index + 1)};
if (is_inserted) {
++inst_index;
}
return it->second;
}
static std::string ArgToIndex(const std::map<const Block*, size_t>& block_to_index, static std::string ArgToIndex(const std::map<const Block*, size_t>& block_to_index,
const std::map<const Inst*, size_t>& inst_to_index, std::map<const Inst*, size_t>& inst_to_index, size_t& inst_index,
const Value& arg) { const Value& arg) {
if (arg.IsEmpty()) { if (arg.IsEmpty()) {
return "<null>"; return "<null>";
@ -80,10 +114,7 @@ static std::string ArgToIndex(const std::map<const Block*, size_t>& block_to_ind
return BlockToIndex(block_to_index, arg.Label()); return BlockToIndex(block_to_index, arg.Label());
} }
if (!arg.IsImmediate()) { if (!arg.IsImmediate()) {
if (const auto it{inst_to_index.find(arg.Inst())}; it != inst_to_index.end()) { return fmt::format("%{}", InstIndex(inst_to_index, inst_index, arg.Inst()));
return fmt::format("%{}", it->second);
}
return fmt::format("%<unknown inst {:016x}>", reinterpret_cast<u64>(arg.Inst()));
} }
switch (arg.Type()) { switch (arg.Type()) {
case Type::U1: case Type::U1:
@ -125,14 +156,14 @@ std::string DumpBlock(const Block& block, const std::map<const Block*, size_t>&
const Opcode op{inst.Opcode()}; const Opcode op{inst.Opcode()};
ret += fmt::format("[{:016x}] ", reinterpret_cast<u64>(&inst)); ret += fmt::format("[{:016x}] ", reinterpret_cast<u64>(&inst));
if (TypeOf(op) != Type::Void) { if (TypeOf(op) != Type::Void) {
ret += fmt::format("%{:<5} = {}", inst_index, op); ret += fmt::format("%{:<5} = {}", InstIndex(inst_to_index, inst_index, &inst), op);
} else { } else {
ret += fmt::format(" {}", op); // '%00000 = ' -> 1 + 5 + 3 = 9 spaces ret += fmt::format(" {}", op); // '%00000 = ' -> 1 + 5 + 3 = 9 spaces
} }
const size_t arg_count{NumArgsOf(op)}; const size_t arg_count{inst.NumArgs()};
for (size_t arg_index = 0; arg_index < arg_count; ++arg_index) { for (size_t arg_index = 0; arg_index < arg_count; ++arg_index) {
const Value arg{inst.Arg(arg_index)}; const Value arg{inst.Arg(arg_index)};
const std::string arg_str{ArgToIndex(block_to_index, inst_to_index, arg)}; const std::string arg_str{ArgToIndex(block_to_index, inst_to_index, inst_index, arg)};
ret += arg_index != 0 ? ", " : " "; ret += arg_index != 0 ? ", " : " ";
if (op == Opcode::Phi) { if (op == Opcode::Phi) {
ret += fmt::format("[ {}, {} ]", arg_index, ret += fmt::format("[ {}, {} ]", arg_index,
@ -140,20 +171,19 @@ std::string DumpBlock(const Block& block, const std::map<const Block*, size_t>&
} else { } else {
ret += arg_str; ret += arg_str;
} }
if (op != Opcode::Phi) {
const Type actual_type{arg.Type()}; const Type actual_type{arg.Type()};
const Type expected_type{ArgTypeOf(op, arg_index)}; const Type expected_type{ArgTypeOf(op, arg_index)};
if (!AreTypesCompatible(actual_type, expected_type)) { if (!AreTypesCompatible(actual_type, expected_type)) {
ret += fmt::format("<type error: {} != {}>", actual_type, expected_type); ret += fmt::format("<type error: {} != {}>", actual_type, expected_type);
} }
} }
}
if (TypeOf(op) != Type::Void) { if (TypeOf(op) != Type::Void) {
ret += fmt::format(" (uses: {})\n", inst.UseCount()); ret += fmt::format(" (uses: {})\n", inst.UseCount());
} else { } else {
ret += '\n'; ret += '\n';
} }
inst_to_index.emplace(&inst, inst_index);
++inst_index;
} }
return ret; return ret;
} }

40
src/shader_recompiler/frontend/ir/basic_block.h
View file

@ -11,7 +11,9 @@
#include <boost/intrusive/list.hpp> #include <boost/intrusive/list.hpp>
#include "shader_recompiler/frontend/ir/condition.h"
#include "shader_recompiler/frontend/ir/microinstruction.h" #include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/frontend/ir/value.h"
#include "shader_recompiler/object_pool.h" #include "shader_recompiler/object_pool.h"
namespace Shader::IR { namespace Shader::IR {
@ -26,6 +28,7 @@ public:
using const_reverse_iterator = InstructionList::const_reverse_iterator; using const_reverse_iterator = InstructionList::const_reverse_iterator;
explicit Block(ObjectPool<Inst>& inst_pool_, u32 begin, u32 end); explicit Block(ObjectPool<Inst>& inst_pool_, u32 begin, u32 end);
explicit Block(ObjectPool<Inst>& inst_pool_);
~Block(); ~Block();
Block(const Block&) = delete; Block(const Block&) = delete;
@ -41,9 +44,15 @@ public:
iterator PrependNewInst(iterator insertion_point, Opcode op, iterator PrependNewInst(iterator insertion_point, Opcode op,
std::initializer_list<Value> args = {}, u64 flags = 0); std::initializer_list<Value> args = {}, u64 flags = 0);
/// Adds a new immediate predecessor to the basic block. /// Set the branches to jump to when all instructions have executed.
void AddImmediatePredecessor(IR::Block* immediate_predecessor); void SetBranches(Condition cond, Block* branch_true, Block* branch_false);
/// Set the branch to unconditionally jump to when all instructions have executed.
void SetBranch(Block* branch);
/// Mark the block as a return block.
void SetReturn();
/// Returns true when the block does not implement any guest instructions directly.
[[nodiscard]] bool IsVirtual() const noexcept;
/// Gets the starting location of this basic block. /// Gets the starting location of this basic block.
[[nodiscard]] u32 LocationBegin() const noexcept; [[nodiscard]] u32 LocationBegin() const noexcept;
/// Gets the end location for this basic block. /// Gets the end location for this basic block.
@ -54,8 +63,23 @@ public:
/// Gets an immutable reference to the instruction list for this basic block. /// Gets an immutable reference to the instruction list for this basic block.
[[nodiscard]] const InstructionList& Instructions() const noexcept; [[nodiscard]] const InstructionList& Instructions() const noexcept;
/// Adds a new immediate predecessor to this basic block.
void AddImmediatePredecessor(Block* block);
/// Gets an immutable span to the immediate predecessors. /// Gets an immutable span to the immediate predecessors.
[[nodiscard]] std::span<IR::Block* const> ImmediatePredecessors() const noexcept; [[nodiscard]] std::span<Block* const> ImmediatePredecessors() const noexcept;
[[nodiscard]] Condition BranchCondition() const noexcept {
return branch_cond;
}
[[nodiscard]] bool IsTerminationBlock() const noexcept {
return !branch_true && !branch_false;
}
[[nodiscard]] Block* TrueBranch() const noexcept {
return branch_true;
}
[[nodiscard]] Block* FalseBranch() const noexcept {
return branch_false;
}
[[nodiscard]] bool empty() const { [[nodiscard]] bool empty() const {
return instructions.empty(); return instructions.empty();
@ -129,10 +153,18 @@ private:
/// List of instructions in this block /// List of instructions in this block
InstructionList instructions; InstructionList instructions;
/// Condition to choose the branch to take
Condition branch_cond{true};
/// Block to jump into when the branch condition evaluates as true
Block* branch_true{nullptr};
/// Block to jump into when the branch condition evaluates as false
Block* branch_false{nullptr};
/// Block immediate predecessors /// Block immediate predecessors
std::vector<IR::Block*> imm_predecessors; std::vector<Block*> imm_predecessors;
}; };
using BlockList = std::vector<Block*>;
[[nodiscard]] std::string DumpBlock(const Block& block); [[nodiscard]] std::string DumpBlock(const Block& block);
[[nodiscard]] std::string DumpBlock(const Block& block, [[nodiscard]] std::string DumpBlock(const Block& block,

2
src/shader_recompiler/frontend/ir/condition.cpp
View file

@ -16,7 +16,6 @@ std::string NameOf(Condition condition) {
ret = fmt::to_string(condition.FlowTest()); ret = fmt::to_string(condition.FlowTest());
} }
const auto [pred, negated]{condition.Pred()}; const auto [pred, negated]{condition.Pred()};
if (pred != Pred::PT || negated) {
if (!ret.empty()) { if (!ret.empty()) {
ret += '&'; ret += '&';
} }
@ -24,7 +23,6 @@ std::string NameOf(Condition condition) {
ret += '!'; ret += '!';
} }
ret += fmt::to_string(pred); ret += fmt::to_string(pred);
}
return ret; return ret;
} }

2
src/shader_recompiler/frontend/ir/condition.h
View file

@ -26,7 +26,7 @@ public:
explicit Condition(Pred pred_, bool pred_negated_ = false) noexcept explicit Condition(Pred pred_, bool pred_negated_ = false) noexcept
: Condition(FlowTest::T, pred_, pred_negated_) {} : Condition(FlowTest::T, pred_, pred_negated_) {}
Condition(bool value) : Condition(Pred::PT, !value) {} explicit Condition(bool value) : Condition(Pred::PT, !value) {}
auto operator<=>(const Condition&) const noexcept = default; auto operator<=>(const Condition&) const noexcept = default;

2
src/shader_recompiler/frontend/ir/function.h
View file

@ -11,7 +11,7 @@
namespace Shader::IR { namespace Shader::IR {
struct Function { struct Function {
boost::container::small_vector<Block*, 16> blocks; BlockList blocks;
}; };
} // namespace Shader::IR } // namespace Shader::IR

43
src/shader_recompiler/frontend/ir/ir_emitter.cpp
View file

@ -44,26 +44,29 @@ F64 IREmitter::Imm64(f64 value) const {
return F64{Value{value}}; return F64{Value{value}};
} }
void IREmitter::Branch(IR::Block* label) { void IREmitter::Branch(Block* label) {
label->AddImmediatePredecessor(block);
Inst(Opcode::Branch, label); Inst(Opcode::Branch, label);
} }
void IREmitter::BranchConditional(const U1& cond, IR::Block* true_label, IR::Block* false_label) { void IREmitter::BranchConditional(const U1& condition, Block* true_label, Block* false_label) {
Inst(Opcode::BranchConditional, cond, true_label, false_label); true_label->AddImmediatePredecessor(block);
false_label->AddImmediatePredecessor(block);
Inst(Opcode::BranchConditional, condition, true_label, false_label);
} }
void IREmitter::Exit() { void IREmitter::LoopMerge(Block* merge_block, Block* continue_target) {
Inst(Opcode::Exit); Inst(Opcode::LoopMerge, merge_block, continue_target);
}
void IREmitter::SelectionMerge(Block* merge_block) {
Inst(Opcode::SelectionMerge, merge_block);
} }
void IREmitter::Return() { void IREmitter::Return() {
Inst(Opcode::Return); Inst(Opcode::Return);
} }
void IREmitter::Unreachable() {
Inst(Opcode::Unreachable);
}
U32 IREmitter::GetReg(IR::Reg reg) { U32 IREmitter::GetReg(IR::Reg reg) {
return Inst<U32>(Opcode::GetRegister, reg); return Inst<U32>(Opcode::GetRegister, reg);
} }
@ -81,6 +84,14 @@ U1 IREmitter::GetPred(IR::Pred pred, bool is_negated) {
} }
} }
U1 IREmitter::GetGotoVariable(u32 id) {
return Inst<U1>(Opcode::GetGotoVariable, id);
}
void IREmitter::SetGotoVariable(u32 id, const U1& value) {
Inst(Opcode::SetGotoVariable, id, value);
}
void IREmitter::SetPred(IR::Pred pred, const U1& value) { void IREmitter::SetPred(IR::Pred pred, const U1& value) {
Inst(Opcode::SetPred, pred, value); Inst(Opcode::SetPred, pred, value);
} }
@ -121,6 +132,20 @@ void IREmitter::SetOFlag(const U1& value) {
Inst(Opcode::SetOFlag, value); Inst(Opcode::SetOFlag, value);
} }
U1 IREmitter::Condition(IR::Condition cond) {
if (cond == IR::Condition{true}) {
return Imm1(true);
} else if (cond == IR::Condition{false}) {
return Imm1(false);
}
const FlowTest flow_test{cond.FlowTest()};
const auto [pred, is_negated]{cond.Pred()};
if (flow_test == FlowTest::T) {
return GetPred(pred, is_negated);
}
throw NotImplementedException("Condition {}", cond);
}
F32 IREmitter::GetAttribute(IR::Attribute attribute) { F32 IREmitter::GetAttribute(IR::Attribute attribute) {
return Inst<F32>(Opcode::GetAttribute, attribute); return Inst<F32>(Opcode::GetAttribute, attribute);
} }

23
src/shader_recompiler/frontend/ir/ir_emitter.h
View file

@ -16,11 +16,11 @@ namespace Shader::IR {
class IREmitter { class IREmitter {
public: public:
explicit IREmitter(Block& block_) : block{block_}, insertion_point{block.end()} {} explicit IREmitter(Block& block_) : block{&block_}, insertion_point{block->end()} {}
explicit IREmitter(Block& block_, Block::iterator insertion_point_) explicit IREmitter(Block& block_, Block::iterator insertion_point_)
: block{block_}, insertion_point{insertion_point_} {} : block{&block_}, insertion_point{insertion_point_} {}
Block& block; Block* block;
[[nodiscard]] U1 Imm1(bool value) const; [[nodiscard]] U1 Imm1(bool value) const;
[[nodiscard]] U8 Imm8(u8 value) const; [[nodiscard]] U8 Imm8(u8 value) const;
@ -31,11 +31,11 @@ public:
[[nodiscard]] U64 Imm64(u64 value) const; [[nodiscard]] U64 Imm64(u64 value) const;
[[nodiscard]] F64 Imm64(f64 value) const; [[nodiscard]] F64 Imm64(f64 value) const;
void Branch(IR::Block* label); void Branch(Block* label);
void BranchConditional(const U1& cond, IR::Block* true_label, IR::Block* false_label); void BranchConditional(const U1& condition, Block* true_label, Block* false_label);
void Exit(); void LoopMerge(Block* merge_block, Block* continue_target);
void SelectionMerge(Block* merge_block);
void Return(); void Return();
void Unreachable();
[[nodiscard]] U32 GetReg(IR::Reg reg); [[nodiscard]] U32 GetReg(IR::Reg reg);
void SetReg(IR::Reg reg, const U32& value); void SetReg(IR::Reg reg, const U32& value);
@ -43,6 +43,9 @@ public:
[[nodiscard]] U1 GetPred(IR::Pred pred, bool is_negated = false); [[nodiscard]] U1 GetPred(IR::Pred pred, bool is_negated = false);
void SetPred(IR::Pred pred, const U1& value); void SetPred(IR::Pred pred, const U1& value);
[[nodiscard]] U1 GetGotoVariable(u32 id);
void SetGotoVariable(u32 id, const U1& value);
[[nodiscard]] U32 GetCbuf(const U32& binding, const U32& byte_offset); [[nodiscard]] U32 GetCbuf(const U32& binding, const U32& byte_offset);
[[nodiscard]] U1 GetZFlag(); [[nodiscard]] U1 GetZFlag();
@ -55,6 +58,8 @@ public:
void SetCFlag(const U1& value); void SetCFlag(const U1& value);
void SetOFlag(const U1& value); void SetOFlag(const U1& value);
[[nodiscard]] U1 Condition(IR::Condition cond);
[[nodiscard]] F32 GetAttribute(IR::Attribute attribute); [[nodiscard]] F32 GetAttribute(IR::Attribute attribute);
void SetAttribute(IR::Attribute attribute, const F32& value); void SetAttribute(IR::Attribute attribute, const F32& value);
@ -168,7 +173,7 @@ private:
template <typename T = Value, typename... Args> template <typename T = Value, typename... Args>
T Inst(Opcode op, Args... args) { T Inst(Opcode op, Args... args) {
auto it{block.PrependNewInst(insertion_point, op, {Value{args}...})}; auto it{block->PrependNewInst(insertion_point, op, {Value{args}...})};
return T{Value{&*it}}; return T{Value{&*it}};
} }
@ -184,7 +189,7 @@ private:
T Inst(Opcode op, Flags<FlagType> flags, Args... args) { T Inst(Opcode op, Flags<FlagType> flags, Args... args) {
u64 raw_flags{}; u64 raw_flags{};
std::memcpy(&raw_flags, &flags.proxy, sizeof(flags.proxy)); std::memcpy(&raw_flags, &flags.proxy, sizeof(flags.proxy));
auto it{block.PrependNewInst(insertion_point, op, {Value{args}...}, raw_flags)}; auto it{block->PrependNewInst(insertion_point, op, {Value{args}...}, raw_flags)};
return T{Value{&*it}}; return T{Value{&*it}};
} }
}; };

4
src/shader_recompiler/frontend/ir/microinstruction.cpp
View file

@ -51,9 +51,9 @@ bool Inst::MayHaveSideEffects() const noexcept {
switch (op) { switch (op) {
case Opcode::Branch: case Opcode::Branch:
case Opcode::BranchConditional: case Opcode::BranchConditional:
case Opcode::Exit: case Opcode::LoopMerge:
case Opcode::SelectionMerge:
case Opcode::Return: case Opcode::Return:
case Opcode::Unreachable:
case Opcode::SetAttribute: case Opcode::SetAttribute:
case Opcode::SetAttributeIndexed: case Opcode::SetAttributeIndexed:
case Opcode::WriteGlobalU8: case Opcode::WriteGlobalU8:

16
src/shader_recompiler/frontend/ir/opcodes.inc
View file

@ -10,15 +10,17 @@ OPCODE(Identity, Opaque, Opaq
// Control flow // Control flow
OPCODE(Branch, Void, Label, ) OPCODE(Branch, Void, Label, )
OPCODE(BranchConditional, Void, U1, Label, Label, ) OPCODE(BranchConditional, Void, U1, Label, Label, )
OPCODE(Exit, Void, ) OPCODE(LoopMerge, Void, Label, Label, )
OPCODE(SelectionMerge, Void, Label, )
OPCODE(Return, Void, ) OPCODE(Return, Void, )
OPCODE(Unreachable, Void, )
// Context getters/setters // Context getters/setters
OPCODE(GetRegister, U32, Reg, ) OPCODE(GetRegister, U32, Reg, )
OPCODE(SetRegister, Void, Reg, U32, ) OPCODE(SetRegister, Void, Reg, U32, )
OPCODE(GetPred, U1, Pred, ) OPCODE(GetPred, U1, Pred, )
OPCODE(SetPred, Void, Pred, U1, ) OPCODE(SetPred, Void, Pred, U1, )
OPCODE(GetGotoVariable, U1, U32, )
OPCODE(SetGotoVariable, Void, U32, U1, )
OPCODE(GetCbuf, U32, U32, U32, ) OPCODE(GetCbuf, U32, U32, U32, )
OPCODE(GetAttribute, U32, Attribute, ) OPCODE(GetAttribute, U32, Attribute, )
OPCODE(SetAttribute, Void, Attribute, U32, ) OPCODE(SetAttribute, Void, Attribute, U32, )
@ -36,11 +38,11 @@ OPCODE(WorkgroupId, U32x3,
OPCODE(LocalInvocationId, U32x3, ) OPCODE(LocalInvocationId, U32x3, )
// Undefined // Undefined
OPCODE(Undef1, U1, ) OPCODE(UndefU1, U1, )
OPCODE(Undef8, U8, ) OPCODE(UndefU8, U8, )
OPCODE(Undef16, U16, ) OPCODE(UndefU16, U16, )
OPCODE(Undef32, U32, ) OPCODE(UndefU32, U32, )
OPCODE(Undef64, U64, ) OPCODE(UndefU64, U64, )
// Memory operations // Memory operations
OPCODE(LoadGlobalU8, U32, U64, ) OPCODE(LoadGlobalU8, U32, U64, )

742
src/shader_recompiler/frontend/ir/structured_control_flow.cpp Normal file
View file

@ -0,0 +1,742 @@
// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <memory>
#include <ranges>
#include <string>
#include <unordered_map>
#include <utility>
#include <vector>
#include <fmt/format.h>
#include <boost/intrusive/list.hpp>
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/ir/ir_emitter.h"
#include "shader_recompiler/object_pool.h"
namespace Shader::IR {
namespace {
struct Statement;
// Use normal_link because we are not guaranteed to destroy the tree in order
using ListBaseHook =
boost::intrusive::list_base_hook<boost::intrusive::link_mode<boost::intrusive::normal_link>>;
using Tree = boost::intrusive::list<Statement,
// Allow using Statement without a definition
boost::intrusive::base_hook<ListBaseHook>,
// Avoid linear complexity on splice, size is never called
boost::intrusive::constant_time_size<false>>;
using Node = Tree::iterator;
using ConstNode = Tree::const_iterator;
enum class StatementType {
Code,
Goto,
Label,
If,
Loop,
Break,
Return,
Function,
Identity,
Not,
Or,
SetVariable,
Variable,
};
bool HasChildren(StatementType type) {
switch (type) {
case StatementType::If:
case StatementType::Loop:
case StatementType::Function:
return true;
default:
return false;
}
}
struct Goto {};
struct Label {};
struct If {};
struct Loop {};
struct Break {};
struct Return {};
struct FunctionTag {};
struct Identity {};
struct Not {};
struct Or {};
struct SetVariable {};
struct Variable {};
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 26495) // Always initialize a member variable, expected in Statement
#endif
struct Statement : ListBaseHook {
Statement(Block* code_, Statement* up_) : code{code_}, up{up_}, type{StatementType::Code} {}
Statement(Goto, Statement* cond_, Node label_, Statement* up_)
: label{label_}, cond{cond_}, up{up_}, type{StatementType::Goto} {}
Statement(Label, u32 id_, Statement* up_) : id{id_}, up{up_}, type{StatementType::Label} {}
Statement(If, Statement* cond_, Tree&& children_, Statement* up_)
: children{std::move(children_)}, cond{cond_}, up{up_}, type{StatementType::If} {}
Statement(Loop, Statement* cond_, Tree&& children_, Statement* up_)
: children{std::move(children_)}, cond{cond_}, up{up_}, type{StatementType::Loop} {}
Statement(Break, Statement* cond_, Statement* up_)
: cond{cond_}, up{up_}, type{StatementType::Break} {}
Statement(Return) : type{StatementType::Return} {}
Statement(FunctionTag) : children{}, type{StatementType::Function} {}
Statement(Identity, Condition cond_) : guest_cond{cond_}, type{StatementType::Identity} {}
Statement(Not, Statement* op_) : op{op_}, type{StatementType::Not} {}
Statement(Or, Statement* op_a_, Statement* op_b_)
: op_a{op_a_}, op_b{op_b_}, type{StatementType::Or} {}
Statement(SetVariable, u32 id_, Statement* op_, Statement* up_)
: op{op_}, id{id_}, up{up_}, type{StatementType::SetVariable} {}
Statement(Variable, u32 id_) : id{id_}, type{StatementType::Variable} {}
~Statement() {
if (HasChildren(type)) {
std::destroy_at(&children);
}
}
union {
Block* code;
Node label;
Tree children;
Condition guest_cond;
Statement* op;
Statement* op_a;
};
union {
Statement* cond;
Statement* op_b;
u32 id;
};
Statement* up{};
StatementType type;
};
#ifdef _MSC_VER
#pragma warning(pop)
#endif
std::string DumpExpr(const Statement* stmt) {
switch (stmt->type) {
case StatementType::Identity:
return fmt::format("{}", stmt->guest_cond);
case StatementType::Not:
return fmt::format("!{}", DumpExpr(stmt->op));
case StatementType::Or:
return fmt::format("{} || {}", DumpExpr(stmt->op_a), DumpExpr(stmt->op_b));
case StatementType::Variable:
return fmt::format("goto_L{}", stmt->id);
default:
return "<invalid type>";
}
}
std::string DumpTree(const Tree& tree, u32 indentation = 0) {
std::string ret;
std::string indent(indentation, ' ');
for (auto stmt = tree.begin(); stmt != tree.end(); ++stmt) {
switch (stmt->type) {
case StatementType::Code:
ret += fmt::format("{} Block {:04x};\n", indent, stmt->code->LocationBegin());
break;
case StatementType::Goto:
ret += fmt::format("{} if ({}) goto L{};\n", indent, DumpExpr(stmt->cond),
stmt->label->id);
break;
case StatementType::Label:
ret += fmt::format("{}L{}:\n", indent, stmt->id);
break;
case StatementType::If:
ret += fmt::format("{} if ({}) {{\n", indent, DumpExpr(stmt->cond));
ret += DumpTree(stmt->children, indentation + 4);
ret += fmt::format("{} }}\n", indent);
break;
case StatementType::Loop:
ret += fmt::format("{} do {{\n", indent);
ret += DumpTree(stmt->children, indentation + 4);
ret += fmt::format("{} }} while ({});\n", indent, DumpExpr(stmt->cond));
break;
case StatementType::Break:
ret += fmt::format("{} if ({}) break;\n", indent, DumpExpr(stmt->cond));
break;
case StatementType::Return:
ret += fmt::format("{} return;\n", indent);
break;
case StatementType::SetVariable:
ret += fmt::format("{} goto_L{} = {};\n", indent, stmt->id, DumpExpr(stmt->op));
break;
case StatementType::Function:
case StatementType::Identity:
case StatementType::Not:
case StatementType::Or:
case StatementType::Variable:
throw LogicError("Statement can't be printed");
}
}
return ret;
}
bool HasNode(const Tree& tree, ConstNode stmt) {
const auto end{tree.end()};
for (auto it = tree.begin(); it != end; ++it) {
if (it == stmt || (HasChildren(it->type) && HasNode(it->children, stmt))) {
return true;
}
}
return false;
}
Node FindStatementWithLabel(Tree& tree, ConstNode goto_stmt) {
const ConstNode label_stmt{goto_stmt->label};
const ConstNode end{tree.end()};
for (auto it = tree.begin(); it != end; ++it) {
if (it == label_stmt || (HasChildren(it->type) && HasNode(it->children, label_stmt))) {
return it;
}
}
throw LogicError("Lift label not in tree");
}
void SanitizeNoBreaks(const Tree& tree) {
if (std::ranges::find(tree, StatementType::Break, &Statement::type) != tree.end()) {
throw NotImplementedException("Capturing statement with break nodes");
}
}
size_t Level(Node stmt) {
size_t level{0};
Statement* node{stmt->up};
while (node) {
++level;
node = node->up;
}
return level;
}
bool IsDirectlyRelated(Node goto_stmt, Node label_stmt) {
const size_t goto_level{Level(goto_stmt)};
const size_t label_level{Level(label_stmt)};
size_t min_level;
size_t max_level;
Node min;
Node max;
if (label_level < goto_level) {
min_level = label_level;
max_level = goto_level;
min = label_stmt;
max = goto_stmt;
} else { // goto_level < label_level
min_level = goto_level;
max_level = label_level;
min = goto_stmt;
max = label_stmt;
}
while (max_level > min_level) {
--max_level;
max = max->up;
}
return min->up == max->up;
}
bool IsIndirectlyRelated(Node goto_stmt, Node label_stmt) {
return goto_stmt->up != label_stmt->up && !IsDirectlyRelated(goto_stmt, label_stmt);
}
bool SearchNode(const Tree& tree, ConstNode stmt, size_t& offset) {
++offset;
const auto end = tree.end();
for (ConstNode it = tree.begin(); it != end; ++it) {
++offset;
if (stmt == it) {
return true;
}
if (HasChildren(it->type) && SearchNode(it->children, stmt, offset)) {
return true;
}
}
return false;
}
class GotoPass {
public:
explicit GotoPass(std::span<Block* const> blocks, ObjectPool<Statement, 64>& stmt_pool)
: pool{stmt_pool} {
std::vector gotos{BuildUnorderedTreeGetGotos(blocks)};
fmt::print(stdout, "BEFORE\n{}\n", DumpTree(root_stmt.children));
for (const Node& goto_stmt : gotos | std::views::reverse) {
RemoveGoto(goto_stmt);
}
fmt::print(stdout, "AFTER\n{}\n", DumpTree(root_stmt.children));
}
Statement& RootStatement() noexcept {
return root_stmt;
}
private:
void RemoveGoto(Node goto_stmt) {
// Force goto_stmt and label_stmt to be directly related
const Node label_stmt{goto_stmt->label};
if (IsIndirectlyRelated(goto_stmt, label_stmt)) {
// Move goto_stmt out using outward-movement transformation until it becomes
// directly related to label_stmt
while (!IsDirectlyRelated(goto_stmt, label_stmt)) {
goto_stmt = MoveOutward(goto_stmt);
}
}
// Force goto_stmt and label_stmt to be siblings
if (IsDirectlyRelated(goto_stmt, label_stmt)) {
const size_t label_level{Level(label_stmt)};
size_t goto_level{Level(goto_stmt)};
if (goto_level > label_level) {
// Move goto_stmt out of its level using outward-movement transformations
while (goto_level > label_level) {
goto_stmt = MoveOutward(goto_stmt);
--goto_level;
}
} else { // Level(goto_stmt) < Level(label_stmt)
if (Offset(goto_stmt) > Offset(label_stmt)) {
// Lift goto_stmt to above stmt containing label_stmt using goto-lifting
// transformations
goto_stmt = Lift(goto_stmt);
}
// Move goto_stmt into label_stmt's level using inward-movement transformation
while (goto_level < label_level) {
goto_stmt = MoveInward(goto_stmt);
++goto_level;
}
}
}
// TODO: Remove this
Node it{goto_stmt};
bool sibling{false};
do {
sibling |= it == label_stmt;
--it;
} while (it != goto_stmt->up->children.begin());
while (it != goto_stmt->up->children.end()) {
sibling |= it == label_stmt;
++it;
}
if (!sibling) {
throw LogicError("Not siblings");
}
// goto_stmt and label_stmt are guaranteed to be siblings, eliminate
if (std::next(goto_stmt) == label_stmt) {
// Simply eliminate the goto if the label is next to it
goto_stmt->up->children.erase(goto_stmt);
} else if (Offset(goto_stmt) < Offset(label_stmt)) {
// Eliminate goto_stmt with a conditional
EliminateAsConditional(goto_stmt, label_stmt);
} else {
// Eliminate goto_stmt with a loop
EliminateAsLoop(goto_stmt, label_stmt);
}
}
std::vector<Node> BuildUnorderedTreeGetGotos(std::span<Block* const> blocks) {
// Assume all blocks have two branches
std::vector<Node> gotos;
gotos.reserve(blocks.size() * 2);
const std::unordered_map labels_map{BuildLabels(blocks)};
Tree& root{root_stmt.children};
auto insert_point{root.begin()};
for (Block* const block : blocks) {
++insert_point; // Skip label
++insert_point; // Skip set variable
root.insert(insert_point, *pool.Create(block, &root_stmt));
if (block->IsTerminationBlock()) {
root.insert(insert_point, *pool.Create(Return{}));
continue;
}
const Condition cond{block->BranchCondition()};
Statement* const true_cond{pool.Create(Identity{}, Condition{true})};
if (cond == Condition{true} || cond == Condition{false}) {
const bool is_true{cond == Condition{true}};
const Block* const branch{is_true ? block->TrueBranch() : block->FalseBranch()};
const Node label{labels_map.at(branch)};
Statement* const goto_stmt{pool.Create(Goto{}, true_cond, label, &root_stmt)};
gotos.push_back(root.insert(insert_point, *goto_stmt));
} else {
Statement* const ident_cond{pool.Create(Identity{}, cond)};
const Node true_label{labels_map.at(block->TrueBranch())};
const Node false_label{labels_map.at(block->FalseBranch())};
Statement* goto_true{pool.Create(Goto{}, ident_cond, true_label, &root_stmt)};
Statement* goto_false{pool.Create(Goto{}, true_cond, false_label, &root_stmt)};
gotos.push_back(root.insert(insert_point, *goto_true));
gotos.push_back(root.insert(insert_point, *goto_false));
}
}
return gotos;
}
std::unordered_map<const Block*, Node> BuildLabels(std::span<Block* const> blocks) {
// TODO: Consider storing labels intrusively inside the block
std::unordered_map<const Block*, Node> labels_map;
Tree& root{root_stmt.children};
u32 label_id{0};
for (const Block* const block : blocks) {
Statement* const label{pool.Create(Label{}, label_id, &root_stmt)};
labels_map.emplace(block, root.insert(root.end(), *label));
Statement* const false_stmt{pool.Create(Identity{}, Condition{false})};
root.push_back(*pool.Create(SetVariable{}, label_id, false_stmt, &root_stmt));
++label_id;
}
return labels_map;
}
void UpdateTreeUp(Statement* tree) {
for (Statement& stmt : tree->children) {
stmt.up = tree;
}
}
void EliminateAsConditional(Node goto_stmt, Node label_stmt) {
Tree& body{goto_stmt->up->children};
Tree if_body;
if_body.splice(if_body.begin(), body, std::next(goto_stmt), label_stmt);
Statement* const cond{pool.Create(Not{}, goto_stmt->cond)};
Statement* const if_stmt{pool.Create(If{}, cond, std::move(if_body), goto_stmt->up)};
UpdateTreeUp(if_stmt);
body.insert(goto_stmt, *if_stmt);
body.erase(goto_stmt);
}
void EliminateAsLoop(Node goto_stmt, Node label_stmt) {
Tree& body{goto_stmt->up->children};
Tree loop_body;
loop_body.splice(loop_body.begin(), body, label_stmt, goto_stmt);
Statement* const cond{goto_stmt->cond};
Statement* const loop{pool.Create(Loop{}, cond, std::move(loop_body), goto_stmt->up)};
UpdateTreeUp(loop);
body.insert(goto_stmt, *loop);
body.erase(goto_stmt);
}
[[nodiscard]] Node MoveOutward(Node goto_stmt) {
switch (goto_stmt->up->type) {
case StatementType::If:
return MoveOutwardIf(goto_stmt);
case StatementType::Loop:
return MoveOutwardLoop(goto_stmt);
default:
throw LogicError("Invalid outward movement");
}
}
[[nodiscard]] Node MoveInward(Node goto_stmt) {
Statement* const parent{goto_stmt->up};
Tree& body{parent->children};
const Node label_nested_stmt{FindStatementWithLabel(body, goto_stmt)};
const Node label{goto_stmt->label};
const u32 label_id{label->id};
Statement* const goto_cond{goto_stmt->cond};
Statement* const set_var{pool.Create(SetVariable{}, label_id, goto_cond, parent)};
body.insert(goto_stmt, *set_var);
Tree if_body;
if_body.splice(if_body.begin(), body, std::next(goto_stmt), label_nested_stmt);
Statement* const variable{pool.Create(Variable{}, label_id)};
Statement* const neg_var{pool.Create(Not{}, variable)};
if (!if_body.empty()) {
Statement* const if_stmt{pool.Create(If{}, neg_var, std::move(if_body), parent)};
UpdateTreeUp(if_stmt);
body.insert(goto_stmt, *if_stmt);
}
body.erase(goto_stmt);
// Update nested if condition
switch (label_nested_stmt->type) {
case StatementType::If:
label_nested_stmt->cond = pool.Create(Or{}, neg_var, label_nested_stmt->cond);
break;
case StatementType::Loop:
break;
default:
throw LogicError("Invalid inward movement");
}
Tree& nested_tree{label_nested_stmt->children};
Statement* const new_goto{pool.Create(Goto{}, variable, label, &*label_nested_stmt)};
return nested_tree.insert(nested_tree.begin(), *new_goto);
}
[[nodiscard]] Node Lift(Node goto_stmt) {
Statement* const parent{goto_stmt->up};
Tree& body{parent->children};
const Node label{goto_stmt->label};
const u32 label_id{label->id};
const Node label_nested_stmt{FindStatementWithLabel(body, goto_stmt)};
const auto type{label_nested_stmt->type};
Tree loop_body;
loop_body.splice(loop_body.begin(), body, label_nested_stmt, goto_stmt);
SanitizeNoBreaks(loop_body);
Statement* const variable{pool.Create(Variable{}, label_id)};
Statement* const loop_stmt{pool.Create(Loop{}, variable, std::move(loop_body), parent)};
UpdateTreeUp(loop_stmt);
const Node loop_node{body.insert(goto_stmt, *loop_stmt)};
Statement* const new_goto{pool.Create(Goto{}, variable, label, loop_stmt)};
loop_stmt->children.push_front(*new_goto);
const Node new_goto_node{loop_stmt->children.begin()};
Statement* const set_var{pool.Create(SetVariable{}, label_id, goto_stmt->cond, loop_stmt)};
loop_stmt->children.push_back(*set_var);
body.erase(goto_stmt);
return new_goto_node;
}
Node MoveOutwardIf(Node goto_stmt) {
const Node parent{Tree::s_iterator_to(*goto_stmt->up)};
Tree& body{parent->children};
const u32 label_id{goto_stmt->label->id};
Statement* const goto_cond{goto_stmt->cond};
Statement* const set_goto_var{pool.Create(SetVariable{}, label_id, goto_cond, &*parent)};
body.insert(goto_stmt, *set_goto_var);
Tree if_body;
if_body.splice(if_body.begin(), body, std::next(goto_stmt), body.end());
if_body.pop_front();
Statement* const cond{pool.Create(Variable{}, label_id)};
Statement* const neg_cond{pool.Create(Not{}, cond)};
Statement* const if_stmt{pool.Create(If{}, neg_cond, std::move(if_body), &*parent)};
UpdateTreeUp(if_stmt);
body.insert(goto_stmt, *if_stmt);
body.erase(goto_stmt);
Statement* const new_cond{pool.Create(Variable{}, label_id)};
Statement* const new_goto{pool.Create(Goto{}, new_cond, goto_stmt->label, parent->up)};
Tree& parent_tree{parent->up->children};
return parent_tree.insert(std::next(parent), *new_goto);
}
Node MoveOutwardLoop(Node goto_stmt) {
Statement* const parent{goto_stmt->up};
Tree& body{parent->children};
const u32 label_id{goto_stmt->label->id};
Statement* const goto_cond{goto_stmt->cond};
Statement* const set_goto_var{pool.Create(SetVariable{}, label_id, goto_cond, parent)};
Statement* const cond{pool.Create(Variable{}, label_id)};
Statement* const break_stmt{pool.Create(Break{}, cond, parent)};
body.insert(goto_stmt, *set_goto_var);
body.insert(goto_stmt, *break_stmt);
body.erase(goto_stmt);
const Node loop{Tree::s_iterator_to(*goto_stmt->up)};
Statement* const new_goto_cond{pool.Create(Variable{}, label_id)};
Statement* const new_goto{pool.Create(Goto{}, new_goto_cond, goto_stmt->label, loop->up)};
Tree& parent_tree{loop->up->children};
return parent_tree.insert(std::next(loop), *new_goto);
}
size_t Offset(ConstNode stmt) const {
size_t offset{0};
if (!SearchNode(root_stmt.children, stmt, offset)) {
fmt::print(stdout, "{}\n", DumpTree(root_stmt.children));
throw LogicError("Node not found in tree");
}
return offset;
}
ObjectPool<Statement, 64>& pool;
Statement root_stmt{FunctionTag{}};
};
Block* TryFindForwardBlock(const Statement& stmt) {
const Tree& tree{stmt.up->children};
const ConstNode end{tree.cend()};
ConstNode forward_node{std::next(Tree::s_iterator_to(stmt))};
while (forward_node != end && !HasChildren(forward_node->type)) {
if (forward_node->type == StatementType::Code) {
return forward_node->code;
}
++forward_node;
}
return nullptr;
}
[[nodiscard]] U1 VisitExpr(IREmitter& ir, const Statement& stmt) {
switch (stmt.type) {
case StatementType::Identity:
return ir.Condition(stmt.guest_cond);
case StatementType::Not:
return ir.LogicalNot(U1{VisitExpr(ir, *stmt.op)});
case StatementType::Or:
return ir.LogicalOr(VisitExpr(ir, *stmt.op_a), VisitExpr(ir, *stmt.op_b));
case StatementType::Variable:
return ir.GetGotoVariable(stmt.id);
default:
throw NotImplementedException("Statement type {}", stmt.type);
}
}
class TranslatePass {
public:
TranslatePass(ObjectPool<Inst>& inst_pool_, ObjectPool<Block>& block_pool_,
ObjectPool<Statement, 64>& stmt_pool_, Statement& root_stmt,
const std::function<void(IR::Block*)>& func_, BlockList& block_list_)
: stmt_pool{stmt_pool_}, inst_pool{inst_pool_}, block_pool{block_pool_}, func{func_},
block_list{block_list_} {
Visit(root_stmt, nullptr, nullptr);
}
private:
void Visit(Statement& parent, Block* continue_block, Block* break_block) {
Tree& tree{parent.children};
Block* current_block{nullptr};
for (auto it = tree.begin(); it != tree.end(); ++it) {
Statement& stmt{*it};
switch (stmt.type) {
case StatementType::Label:
// Labels can be ignored
break;
case StatementType::Code: {
if (current_block && current_block != stmt.code) {
IREmitter ir{*current_block};
ir.Branch(stmt.code);
}
current_block = stmt.code;
func(stmt.code);
block_list.push_back(stmt.code);
break;
}
case StatementType::SetVariable: {
if (!current_block) {
current_block = MergeBlock(parent, stmt);
}
IREmitter ir{*current_block};
ir.SetGotoVariable(stmt.id, VisitExpr(ir, *stmt.op));
break;
}
case StatementType::If: {
if (!current_block) {
current_block = block_pool.Create(inst_pool);
block_list.push_back(current_block);
}
Block* const merge_block{MergeBlock(parent, stmt)};
// Visit children
const size_t first_block_index{block_list.size()};
Visit(stmt, merge_block, break_block);
// Implement if header block
Block* const first_if_block{block_list.at(first_block_index)};
IREmitter ir{*current_block};
const U1 cond{VisitExpr(ir, *stmt.cond)};
ir.SelectionMerge(merge_block);
ir.BranchConditional(cond, first_if_block, merge_block);
current_block = merge_block;
break;
}
case StatementType::Loop: {
Block* const loop_header_block{block_pool.Create(inst_pool)};
if (current_block) {
IREmitter{*current_block}.Branch(loop_header_block);
}
block_list.push_back(loop_header_block);
Block* const new_continue_block{block_pool.Create(inst_pool)};
Block* const merge_block{MergeBlock(parent, stmt)};
// Visit children
const size_t first_block_index{block_list.size()};
Visit(stmt, new_continue_block, merge_block);
// The continue block is located at the end of the loop
block_list.push_back(new_continue_block);
// Implement loop header block
Block* const first_loop_block{block_list.at(first_block_index)};
IREmitter ir{*loop_header_block};
ir.LoopMerge(merge_block, new_continue_block);
ir.Branch(first_loop_block);
// Implement continue block
IREmitter continue_ir{*new_continue_block};
const U1 continue_cond{VisitExpr(continue_ir, *stmt.cond)};
continue_ir.BranchConditional(continue_cond, ir.block, merge_block);
current_block = merge_block;
break;
}
case StatementType::Break: {
if (!current_block) {
current_block = block_pool.Create(inst_pool);
block_list.push_back(current_block);
}
Block* const skip_block{MergeBlock(parent, stmt)};
IREmitter ir{*current_block};
ir.BranchConditional(VisitExpr(ir, *stmt.cond), break_block, skip_block);
current_block = skip_block;
break;
}
case StatementType::Return: {
if (!current_block) {
current_block = block_pool.Create(inst_pool);
block_list.push_back(current_block);
}
IREmitter{*current_block}.Return();
current_block = nullptr;
break;
}
default:
throw NotImplementedException("Statement type {}", stmt.type);
}
}
if (current_block && continue_block) {
IREmitter ir{*current_block};
ir.Branch(continue_block);
}
}
Block* MergeBlock(Statement& parent, Statement& stmt) {
if (Block* const block{TryFindForwardBlock(stmt)}) {
return block;
}
// Create a merge block we can visit later
Block* const block{block_pool.Create(inst_pool)};
Statement* const merge_stmt{stmt_pool.Create(block, &parent)};
parent.children.insert(std::next(Tree::s_iterator_to(stmt)), *merge_stmt);
return block;
}
ObjectPool<Statement, 64>& stmt_pool;
ObjectPool<Inst>& inst_pool;
ObjectPool<Block>& block_pool;
const std::function<void(IR::Block*)>& func;
BlockList& block_list;
};
} // Anonymous namespace
BlockList VisitAST(ObjectPool<Inst>& inst_pool, ObjectPool<Block>& block_pool,
std::span<Block* const> unordered_blocks,
const std::function<void(Block*)>& func) {
ObjectPool<Statement, 64> stmt_pool;
GotoPass goto_pass{unordered_blocks, stmt_pool};
BlockList block_list;
TranslatePass translate_pass{inst_pool, block_pool, stmt_pool, goto_pass.RootStatement(),
func, block_list};
return block_list;
}
} // namespace Shader::IR

22
src/shader_recompiler/frontend/ir/structured_control_flow.h Normal file
View file

@ -0,0 +1,22 @@
// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <functional>
#include <span>
#include <boost/intrusive/list.hpp>
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/object_pool.h"
namespace Shader::IR {
[[nodiscard]] BlockList VisitAST(ObjectPool<Inst>& inst_pool, ObjectPool<Block>& block_pool,
std::span<Block* const> unordered_blocks,
const std::function<void(Block*)>& func);
} // namespace Shader::IR

420
src/shader_recompiler/frontend/maxwell/control_flow.cpp
View file

@ -17,38 +17,49 @@
#include "shader_recompiler/frontend/maxwell/location.h" #include "shader_recompiler/frontend/maxwell/location.h"
namespace Shader::Maxwell::Flow { namespace Shader::Maxwell::Flow {
namespace {
struct Compare {
bool operator()(const Block& lhs, Location rhs) const noexcept {
return lhs.begin < rhs;
}
bool operator()(Location lhs, const Block& rhs) const noexcept {
return lhs < rhs.begin;
}
bool operator()(const Block& lhs, const Block& rhs) const noexcept {
return lhs.begin < rhs.begin;
}
};
} // Anonymous namespace
static u32 BranchOffset(Location pc, Instruction inst) { static u32 BranchOffset(Location pc, Instruction inst) {
return pc.Offset() + inst.branch.Offset() + 8; return pc.Offset() + inst.branch.Offset() + 8;
} }
static std::array<Block, 2> Split(Block&& block, Location pc, BlockId new_id) { static void Split(Block* old_block, Block* new_block, Location pc) {
if (pc <= block.begin || pc >= block.end) { if (pc <= old_block->begin || pc >= old_block->end) {
throw InvalidArgument("Invalid address to split={}", pc); throw InvalidArgument("Invalid address to split={}", pc);
} }
return { *new_block = Block{
Block{ .begin{pc},
.begin{block.begin}, .end{old_block->end},
.end_class{old_block->end_class},
.stack{old_block->stack},
.cond{old_block->cond},
.branch_true{old_block->branch_true},
.branch_false{old_block->branch_false},
.ir{nullptr},
};
*old_block = Block{
.begin{old_block->begin},
.end{pc}, .end{pc},
.end_class{EndClass::Branch}, .end_class{EndClass::Branch},
.id{block.id}, .stack{std::move(old_block->stack)},
.stack{block.stack}, .cond{IR::Condition{true}},
.cond{true}, .branch_true{new_block},
.branch_true{new_id}, .branch_false{nullptr},
.branch_false{UNREACHABLE_BLOCK_ID}, .ir{nullptr},
.imm_predecessors{},
},
Block{
.begin{pc},
.end{block.end},
.end_class{block.end_class},
.id{new_id},
.stack{std::move(block.stack)},
.cond{block.cond},
.branch_true{block.branch_true},
.branch_false{block.branch_false},
.imm_predecessors{},
},
}; };
} }
@ -112,7 +123,7 @@ static bool HasFlowTest(Opcode opcode) {
static std::string NameOf(const Block& block) { static std::string NameOf(const Block& block) {
if (block.begin.IsVirtual()) { if (block.begin.IsVirtual()) {
return fmt::format("\"Virtual {}\"", block.id); return fmt::format("\"Virtual {}\"", block.begin);
} else { } else {
return fmt::format("\"{}\"", block.begin); return fmt::format("\"{}\"", block.begin);
} }
@ -158,126 +169,23 @@ bool Block::Contains(Location pc) const noexcept {
Function::Function(Location start_address) Function::Function(Location start_address)
: entrypoint{start_address}, labels{{ : entrypoint{start_address}, labels{{
.address{start_address}, .address{start_address},
.block_id{0}, .block{nullptr},
.stack{}, .stack{},
}} {} }} {}
void Function::BuildBlocksMap() { CFG::CFG(Environment& env_, ObjectPool<Block>& block_pool_, Location start_address)
const size_t num_blocks{NumBlocks()}; : env{env_}, block_pool{block_pool_} {
blocks_map.resize(num_blocks);
for (size_t block_index = 0; block_index < num_blocks; ++block_index) {
Block& block{blocks_data[block_index]};
blocks_map[block.id] = &block;
}
}
void Function::BuildImmediatePredecessors() {
for (const Block& block : blocks_data) {
if (block.branch_true != UNREACHABLE_BLOCK_ID) {
blocks_map[block.branch_true]->imm_predecessors.push_back(block.id);
}
if (block.branch_false != UNREACHABLE_BLOCK_ID) {
blocks_map[block.branch_false]->imm_predecessors.push_back(block.id);
}
}
}
void Function::BuildPostOrder() {
boost::container::small_vector<BlockId, 0x110> block_stack;
post_order_map.resize(NumBlocks());
Block& first_block{blocks_data[blocks.front()]};
first_block.post_order_visited = true;
block_stack.push_back(first_block.id);
const auto visit_branch = [&](BlockId block_id, BlockId branch_id) {
if (branch_id == UNREACHABLE_BLOCK_ID) {
return false;
}
if (blocks_map[branch_id]->post_order_visited) {
return false;
}
blocks_map[branch_id]->post_order_visited = true;
// Calling push_back twice is faster than insert on msvc
block_stack.push_back(block_id);
block_stack.push_back(branch_id);
return true;
};
while (!block_stack.empty()) {
const Block* const block{blocks_map[block_stack.back()]};
block_stack.pop_back();
if (!visit_branch(block->id, block->branch_true) &&
!visit_branch(block->id, block->branch_false)) {
post_order_map[block->id] = static_cast<u32>(post_order_blocks.size());
post_order_blocks.push_back(block->id);
}
}
}
void Function::BuildImmediateDominators() {
auto transform_block_id{std::views::transform([this](BlockId id) { return blocks_map[id]; })};
auto reverse_order_but_first{std::views::reverse | std::views::drop(1) | transform_block_id};
auto has_idom{std::views::filter([](Block* block) { return block->imm_dominator; })};
auto intersect{[this](Block* finger1, Block* finger2) {
while (finger1 != finger2) {
while (post_order_map[finger1->id] < post_order_map[finger2->id]) {
finger1 = finger1->imm_dominator;
}
while (post_order_map[finger2->id] < post_order_map[finger1->id]) {
finger2 = finger2->imm_dominator;
}
}
return finger1;
}};
for (Block& block : blocks_data) {
block.imm_dominator = nullptr;
}
Block* const start_block{&blocks_data[blocks.front()]};
start_block->imm_dominator = start_block;
bool changed{true};
while (changed) {
changed = false;
for (Block* const block : post_order_blocks | reverse_order_but_first) {
Block* new_idom{};
for (Block* predecessor : block->imm_predecessors | transform_block_id | has_idom) {
new_idom = new_idom ? intersect(predecessor, new_idom) : predecessor;
}
changed |= block->imm_dominator != new_idom;
block->imm_dominator = new_idom;
}
}
}
void Function::BuildDominanceFrontier() {
auto transform_block_id{std::views::transform([this](BlockId id) { return blocks_map[id]; })};
auto has_enough_predecessors{[](Block& block) { return block.imm_predecessors.size() >= 2; }};
for (Block& block : blocks_data | std::views::filter(has_enough_predecessors)) {
for (Block* current : block.imm_predecessors | transform_block_id) {
while (current != block.imm_dominator) {
current->dominance_frontiers.push_back(current->id);
current = current->imm_dominator;
}
}
}
}
CFG::CFG(Environment& env_, Location start_address) : env{env_} {
VisitFunctions(start_address);
for (Function& function : functions) {
function.BuildBlocksMap();
function.BuildImmediatePredecessors();
function.BuildPostOrder();
function.BuildImmediateDominators();
function.BuildDominanceFrontier();
}
}
void CFG::VisitFunctions(Location start_address) {
functions.emplace_back(start_address); functions.emplace_back(start_address);
functions.back().labels.back().block = block_pool.Create(Block{
.begin{start_address},
.end{start_address},
.end_class{EndClass::Branch},
.stack{},
.cond{IR::Condition{true}},
.branch_true{nullptr},
.branch_false{nullptr},
.ir{nullptr},
});
for (FunctionId function_id = 0; function_id < functions.size(); ++function_id) { for (FunctionId function_id = 0; function_id < functions.size(); ++function_id) {
while (!functions[function_id].labels.empty()) { while (!functions[function_id].labels.empty()) {
Function& function{functions[function_id]}; Function& function{functions[function_id]};
@ -294,35 +202,16 @@ void CFG::AnalyzeLabel(FunctionId function_id, Label& label) {
return; return;
} }
// Try to find the next block // Try to find the next block
Function* function{&functions[function_id]}; Function* const function{&functions[function_id]};
Location pc{label.address}; Location pc{label.address};
const auto next{std::upper_bound(function->blocks.begin(), function->blocks.end(), pc, const auto next_it{function->blocks.upper_bound(pc, Compare{})};
[function](Location pc, u32 block_index) { const bool is_last{next_it == function->blocks.end()};
return pc < function->blocks_data[block_index].begin; Block* const next{is_last ? nullptr : &*next_it};
})};
const auto next_index{std::distance(function->blocks.begin(), next)};
const bool is_last{next == function->blocks.end()};
Location next_pc;
BlockId next_id{UNREACHABLE_BLOCK_ID};
if (!is_last) {
next_pc = function->blocks_data[*next].begin;
next_id = function->blocks_data[*next].id;
}
// Insert before the next block // Insert before the next block
Block block{ Block* const block{label.block};
.begin{pc},
.end{pc},
.end_class{EndClass::Branch},
.id{label.block_id},
.stack{std::move(label.stack)},
.cond{true},
.branch_true{UNREACHABLE_BLOCK_ID},
.branch_false{UNREACHABLE_BLOCK_ID},
.imm_predecessors{},
};
// Analyze instructions until it reaches an already visited block or there's a branch // Analyze instructions until it reaches an already visited block or there's a branch
bool is_branch{false}; bool is_branch{false};
while (is_last || pc < next_pc) { while (!next || pc < next->begin) {
is_branch = AnalyzeInst(block, function_id, pc) == AnalysisState::Branch; is_branch = AnalyzeInst(block, function_id, pc) == AnalysisState::Branch;
if (is_branch) { if (is_branch) {
break; break;
@ -332,43 +221,36 @@ void CFG::AnalyzeLabel(FunctionId function_id, Label& label) {
if (!is_branch) { if (!is_branch) {
// If the block finished without a branch, // If the block finished without a branch,
// it means that the next instruction is already visited, jump to it // it means that the next instruction is already visited, jump to it
block.end = pc; block->end = pc;
block.cond = true; block->cond = IR::Condition{true};
block.branch_true = next_id; block->branch_true = next;
block.branch_false = UNREACHABLE_BLOCK_ID; block->branch_false = nullptr;
} }
// Function's pointer might be invalid, resolve it again // Function's pointer might be invalid, resolve it again
function = &functions[function_id]; // Insert the new block
const u32 new_block_index = static_cast<u32>(function->blocks_data.size()); functions[function_id].blocks.insert(*block);
function->blocks.insert(function->blocks.begin() + next_index, new_block_index);
function->blocks_data.push_back(std::move(block));
} }
bool CFG::InspectVisitedBlocks(FunctionId function_id, const Label& label) { bool CFG::InspectVisitedBlocks(FunctionId function_id, const Label& label) {
const Location pc{label.address}; const Location pc{label.address};
Function& function{functions[function_id]}; Function& function{functions[function_id]};
const auto it{std::ranges::find_if(function.blocks, [&function, pc](u32 block_index) { const auto it{
return function.blocks_data[block_index].Contains(pc); std::ranges::find_if(function.blocks, [pc](auto& block) { return block.Contains(pc); })};
})};
if (it == function.blocks.end()) { if (it == function.blocks.end()) {
// Address has not been visited // Address has not been visited
return false; return false;
} }
Block& block{function.blocks_data[*it]}; Block* const visited_block{&*it};
if (block.begin == pc) { if (visited_block->begin == pc) {
throw LogicError("Dangling branch"); throw LogicError("Dangling block");
} }
const u32 first_index{*it}; Block* const new_block{label.block};
const u32 second_index{static_cast<u32>(function.blocks_data.size())}; Split(visited_block, new_block, pc);
const std::array new_indices{first_index, second_index}; function.blocks.insert(it, *new_block);
std::array split_blocks{Split(std::move(block), pc, label.block_id)};
function.blocks_data[*it] = std::move(split_blocks[0]);
function.blocks_data.push_back(std::move(split_blocks[1]));
function.blocks.insert(function.blocks.erase(it), new_indices.begin(), new_indices.end());
return true; return true;
} }
CFG::AnalysisState CFG::AnalyzeInst(Block& block, FunctionId function_id, Location pc) { CFG::AnalysisState CFG::AnalyzeInst(Block* block, FunctionId function_id, Location pc) {
const Instruction inst{env.ReadInstruction(pc.Offset())}; const Instruction inst{env.ReadInstruction(pc.Offset())};
const Opcode opcode{Decode(inst.raw)}; const Opcode opcode{Decode(inst.raw)};
switch (opcode) { switch (opcode) {
@ -390,12 +272,12 @@ CFG::AnalysisState CFG::AnalyzeInst(Block& block, FunctionId function_id, Locati
AnalyzeBRX(block, pc, inst, IsAbsoluteJump(opcode)); AnalyzeBRX(block, pc, inst, IsAbsoluteJump(opcode));
break; break;
case Opcode::RET: case Opcode::RET:
block.end_class = EndClass::Return; block->end_class = EndClass::Return;
break; break;
default: default:
break; break;
} }
block.end = pc; block->end = pc;
return AnalysisState::Branch; return AnalysisState::Branch;
case Opcode::BRK: case Opcode::BRK:
case Opcode::CONT: case Opcode::CONT:
@ -404,9 +286,9 @@ CFG::AnalysisState CFG::AnalyzeInst(Block& block, FunctionId function_id, Locati
if (!AnalyzeBranch(block, function_id, pc, inst, opcode)) { if (!AnalyzeBranch(block, function_id, pc, inst, opcode)) {
return AnalysisState::Continue; return AnalysisState::Continue;
} }
const auto [stack_pc, new_stack]{block.stack.Pop(OpcodeToken(opcode))}; const auto [stack_pc, new_stack]{block->stack.Pop(OpcodeToken(opcode))};
block.branch_true = AddLabel(block, new_stack, stack_pc, function_id); block->branch_true = AddLabel(block, new_stack, stack_pc, function_id);
block.end = pc; block->end = pc;
return AnalysisState::Branch; return AnalysisState::Branch;
} }
case Opcode::PBK: case Opcode::PBK:
@ -414,7 +296,7 @@ CFG::AnalysisState CFG::AnalyzeInst(Block& block, FunctionId function_id, Locati
case Opcode::PEXIT: case Opcode::PEXIT:
case Opcode::PLONGJMP: case Opcode::PLONGJMP:
case Opcode::SSY: case Opcode::SSY:
block.stack.Push(OpcodeToken(opcode), BranchOffset(pc, inst)); block->stack.Push(OpcodeToken(opcode), BranchOffset(pc, inst));
return AnalysisState::Continue; return AnalysisState::Continue;
case Opcode::EXIT: case Opcode::EXIT:
return AnalyzeEXIT(block, function_id, pc, inst); return AnalyzeEXIT(block, function_id, pc, inst);
@ -444,51 +326,51 @@ CFG::AnalysisState CFG::AnalyzeInst(Block& block, FunctionId function_id, Locati
return AnalysisState::Branch; return AnalysisState::Branch;
} }
void CFG::AnalyzeCondInst(Block& block, FunctionId function_id, Location pc, void CFG::AnalyzeCondInst(Block* block, FunctionId function_id, Location pc,
EndClass insn_end_class, IR::Condition cond) { EndClass insn_end_class, IR::Condition cond) {
if (block.begin != pc) { if (block->begin != pc) {
// If the block doesn't start in the conditional instruction // If the block doesn't start in the conditional instruction
// mark it as a label to visit it later // mark it as a label to visit it later
block.end = pc; block->end = pc;
block.cond = true; block->cond = IR::Condition{true};
block.branch_true = AddLabel(block, block.stack, pc, function_id); block->branch_true = AddLabel(block, block->stack, pc, function_id);
block.branch_false = UNREACHABLE_BLOCK_ID; block->branch_false = nullptr;
return; return;
} }
// Impersonate the visited block with a virtual block // Create a virtual block and a conditional block
// Jump from this virtual to the real conditional instruction and the next instruction Block* const conditional_block{block_pool.Create()};
Function& function{functions[function_id]}; Block virtual_block{
const BlockId conditional_block_id{++function.current_block_id}; .begin{block->begin.Virtual()},
function.blocks.push_back(static_cast<u32>(function.blocks_data.size())); .end{block->begin.Virtual()},
Block& virtual_block{function.blocks_data.emplace_back(Block{
.begin{}, // Virtual block
.end{},
.end_class{EndClass::Branch}, .end_class{EndClass::Branch},
.id{block.id}, // Impersonating .stack{block->stack},
.stack{block.stack},
.cond{cond}, .cond{cond},
.branch_true{conditional_block_id}, .branch_true{conditional_block},
.branch_false{UNREACHABLE_BLOCK_ID}, .branch_false{nullptr},
.imm_predecessors{}, .ir{nullptr},
})}; };
// Set the end properties of the conditional instruction and give it a new identity // Save the contents of the visited block in the conditional block
Block& conditional_block{block}; *conditional_block = std::move(*block);
conditional_block.end = pc; // Impersonate the visited block with a virtual block
conditional_block.end_class = insn_end_class; *block = std::move(virtual_block);
conditional_block.id = conditional_block_id; // Set the end properties of the conditional instruction
conditional_block->end = pc;
conditional_block->end_class = insn_end_class;
// Add a label to the instruction after the conditional instruction // Add a label to the instruction after the conditional instruction
const BlockId endif_block_id{AddLabel(conditional_block, block.stack, pc + 1, function_id)}; Block* const endif_block{AddLabel(conditional_block, block->stack, pc + 1, function_id)};
// Branch to the next instruction from the virtual block // Branch to the next instruction from the virtual block
virtual_block.branch_false = endif_block_id; block->branch_false = endif_block;
// And branch to it from the conditional instruction if it is a branch // And branch to it from the conditional instruction if it is a branch
if (insn_end_class == EndClass::Branch) { if (insn_end_class == EndClass::Branch) {
conditional_block.cond = true; conditional_block->cond = IR::Condition{true};
conditional_block.branch_true = endif_block_id; conditional_block->branch_true = endif_block;
conditional_block.branch_false = UNREACHABLE_BLOCK_ID; conditional_block->branch_false = nullptr;
} }
// Finally insert the condition block into the list of blocks
functions[function_id].blocks.insert(*conditional_block);
} }
bool CFG::AnalyzeBranch(Block& block, FunctionId function_id, Location pc, Instruction inst, bool CFG::AnalyzeBranch(Block* block, FunctionId function_id, Location pc, Instruction inst,
Opcode opcode) { Opcode opcode) {
if (inst.branch.is_cbuf) { if (inst.branch.is_cbuf) {
throw NotImplementedException("Branch with constant buffer offset"); throw NotImplementedException("Branch with constant buffer offset");
@ -500,21 +382,21 @@ bool CFG::AnalyzeBranch(Block& block, FunctionId function_id, Location pc, Instr
const bool has_flow_test{HasFlowTest(opcode)}; const bool has_flow_test{HasFlowTest(opcode)};
const IR::FlowTest flow_test{has_flow_test ? inst.branch.flow_test.Value() : IR::FlowTest::T}; const IR::FlowTest flow_test{has_flow_test ? inst.branch.flow_test.Value() : IR::FlowTest::T};
if (pred != Predicate{true} || flow_test != IR::FlowTest::T) { if (pred != Predicate{true} || flow_test != IR::FlowTest::T) {
block.cond = IR::Condition(flow_test, static_cast<IR::Pred>(pred.index), pred.negated); block->cond = IR::Condition(flow_test, static_cast<IR::Pred>(pred.index), pred.negated);
block.branch_false = AddLabel(block, block.stack, pc + 1, function_id); block->branch_false = AddLabel(block, block->stack, pc + 1, function_id);
} else { } else {
block.cond = true; block->cond = IR::Condition{true};
} }
return true; return true;
} }
void CFG::AnalyzeBRA(Block& block, FunctionId function_id, Location pc, Instruction inst, void CFG::AnalyzeBRA(Block* block, FunctionId function_id, Location pc, Instruction inst,
bool is_absolute) { bool is_absolute) {
const Location bra_pc{is_absolute ? inst.branch.Absolute() : BranchOffset(pc, inst)}; const Location bra_pc{is_absolute ? inst.branch.Absolute() : BranchOffset(pc, inst)};
block.branch_true = AddLabel(block, block.stack, bra_pc, function_id); block->branch_true = AddLabel(block, block->stack, bra_pc, function_id);
} }
void CFG::AnalyzeBRX(Block&, Location, Instruction, bool is_absolute) { void CFG::AnalyzeBRX(Block*, Location, Instruction, bool is_absolute) {
throw NotImplementedException("{}", is_absolute ? "JMX" : "BRX"); throw NotImplementedException("{}", is_absolute ? "JMX" : "BRX");
} }
@ -528,7 +410,7 @@ void CFG::AnalyzeCAL(Location pc, Instruction inst, bool is_absolute) {
} }
} }
CFG::AnalysisState CFG::AnalyzeEXIT(Block& block, FunctionId function_id, Location pc, CFG::AnalysisState CFG::AnalyzeEXIT(Block* block, FunctionId function_id, Location pc,
Instruction inst) { Instruction inst) {
const IR::FlowTest flow_test{inst.branch.flow_test}; const IR::FlowTest flow_test{inst.branch.flow_test};
const Predicate pred{inst.Pred()}; const Predicate pred{inst.Pred()};
@ -537,41 +419,52 @@ CFG::AnalysisState CFG::AnalyzeEXIT(Block& block, FunctionId function_id, Locati
return AnalysisState::Continue; return AnalysisState::Continue;
} }
if (pred != Predicate{true} || flow_test != IR::FlowTest::T) { if (pred != Predicate{true} || flow_test != IR::FlowTest::T) {
if (block.stack.Peek(Token::PEXIT).has_value()) { if (block->stack.Peek(Token::PEXIT).has_value()) {
throw NotImplementedException("Conditional EXIT with PEXIT token"); throw NotImplementedException("Conditional EXIT with PEXIT token");
} }
const IR::Condition cond{flow_test, static_cast<IR::Pred>(pred.index), pred.negated}; const IR::Condition cond{flow_test, static_cast<IR::Pred>(pred.index), pred.negated};
AnalyzeCondInst(block, function_id, pc, EndClass::Exit, cond); AnalyzeCondInst(block, function_id, pc, EndClass::Exit, cond);
return AnalysisState::Branch; return AnalysisState::Branch;
} }
if (const std::optional<Location> exit_pc{block.stack.Peek(Token::PEXIT)}) { if (const std::optional<Location> exit_pc{block->stack.Peek(Token::PEXIT)}) {
const Stack popped_stack{block.stack.Remove(Token::PEXIT)}; const Stack popped_stack{block->stack.Remove(Token::PEXIT)};
block.cond = true; block->cond = IR::Condition{true};
block.branch_true = AddLabel(block, popped_stack, *exit_pc, function_id); block->branch_true = AddLabel(block, popped_stack, *exit_pc, function_id);
block.branch_false = UNREACHABLE_BLOCK_ID; block->branch_false = nullptr;
return AnalysisState::Branch; return AnalysisState::Branch;
} }
block.end = pc; block->end = pc;
block.end_class = EndClass::Exit; block->end_class = EndClass::Exit;
return AnalysisState::Branch; return AnalysisState::Branch;
} }
BlockId CFG::AddLabel(const Block& block, Stack stack, Location pc, FunctionId function_id) { Block* CFG::AddLabel(Block* block, Stack stack, Location pc, FunctionId function_id) {
Function& function{functions[function_id]}; Function& function{functions[function_id]};
if (block.begin == pc) { if (block->begin == pc) {
return block.id; // Jumps to itself
return block;
} }
const auto target{std::ranges::find(function.blocks_data, pc, &Block::begin)}; if (const auto it{function.blocks.find(pc, Compare{})}; it != function.blocks.end()) {
if (target != function.blocks_data.end()) { // Block already exists and it has been visited
return target->id; return &*it;
} }
const BlockId block_id{++function.current_block_id}; // TODO: FIX DANGLING BLOCKS
Block* const new_block{block_pool.Create(Block{
.begin{pc},
.end{pc},
.end_class{EndClass::Branch},
.stack{stack},
.cond{IR::Condition{true}},
.branch_true{nullptr},
.branch_false{nullptr},
.ir{nullptr},
})};
function.labels.push_back(Label{ function.labels.push_back(Label{
.address{pc}, .address{pc},
.block_id{block_id}, .block{new_block},
.stack{std::move(stack)}, .stack{std::move(stack)},
}); });
return block_id; return new_block;
} }
std::string CFG::Dot() const { std::string CFG::Dot() const {
@ -581,18 +474,12 @@ std::string CFG::Dot() const {
for (const Function& function : functions) { for (const Function& function : functions) {
dot += fmt::format("\tsubgraph cluster_{} {{\n", function.entrypoint); dot += fmt::format("\tsubgraph cluster_{} {{\n", function.entrypoint);
dot += fmt::format("\t\tnode [style=filled];\n"); dot += fmt::format("\t\tnode [style=filled];\n");
for (const u32 block_index : function.blocks) { for (const Block& block : function.blocks) {
const Block& block{function.blocks_data[block_index]};
const std::string name{NameOf(block)}; const std::string name{NameOf(block)};
const auto add_branch = [&](BlockId branch_id, bool add_label) { const auto add_branch = [&](Block* branch, bool add_label) {
const auto it{std::ranges::find(function.blocks_data, branch_id, &Block::id)}; dot += fmt::format("\t\t{}->{}", name, NameOf(*branch));
dot += fmt::format("\t\t{}->", name); if (add_label && block.cond != IR::Condition{true} &&
if (it == function.blocks_data.end()) { block.cond != IR::Condition{false}) {
dot += fmt::format("\"Unknown label {}\"", branch_id);
} else {
dot += NameOf(*it);
};
if (add_label && block.cond != true && block.cond != false) {
dot += fmt::format(" [label=\"{}\"]", block.cond); dot += fmt::format(" [label=\"{}\"]", block.cond);
} }
dot += '\n'; dot += '\n';
@ -600,10 +487,10 @@ std::string CFG::Dot() const {
dot += fmt::format("\t\t{};\n", name); dot += fmt::format("\t\t{};\n", name);
switch (block.end_class) { switch (block.end_class) {
case EndClass::Branch: case EndClass::Branch:
if (block.cond != false) { if (block.cond != IR::Condition{false}) {
add_branch(block.branch_true, true); add_branch(block.branch_true, true);
} }
if (block.cond != true) { if (block.cond != IR::Condition{true}) {
add_branch(block.branch_false, false); add_branch(block.branch_false, false);
} }
break; break;
@ -619,12 +506,6 @@ std::string CFG::Dot() const {
node_uid); node_uid);
++node_uid; ++node_uid;
break; break;
case EndClass::Unreachable:
dot += fmt::format("\t\t{}->N{};\n", name, node_uid);
dot += fmt::format(
"\t\tN{} [label=\"Unreachable\"][shape=square][style=stripped];\n", node_uid);
++node_uid;
break;
} }
} }
if (function.entrypoint == 8) { if (function.entrypoint == 8) {
@ -635,10 +516,11 @@ std::string CFG::Dot() const {
dot += "\t}\n"; dot += "\t}\n";
} }
if (!functions.empty()) { if (!functions.empty()) {
if (functions.front().blocks.empty()) { auto& function{functions.front()};
if (function.blocks.empty()) {
dot += "Start;\n"; dot += "Start;\n";
} else { } else {
dot += fmt::format("\tStart -> {};\n", NameOf(functions.front().blocks_data.front())); dot += fmt::format("\tStart -> {};\n", NameOf(*function.blocks.begin()));
} }
dot += fmt::format("\tStart [shape=diamond];\n"); dot += fmt::format("\tStart [shape=diamond];\n");
} }

77
src/shader_recompiler/frontend/maxwell/control_flow.h
View file

@ -11,25 +11,27 @@
#include <vector> #include <vector>
#include <boost/container/small_vector.hpp> #include <boost/container/small_vector.hpp>
#include <boost/intrusive/set.hpp>
#include "shader_recompiler/environment.h" #include "shader_recompiler/environment.h"
#include "shader_recompiler/frontend/ir/condition.h" #include "shader_recompiler/frontend/ir/condition.h"
#include "shader_recompiler/frontend/maxwell/instruction.h" #include "shader_recompiler/frontend/maxwell/instruction.h"
#include "shader_recompiler/frontend/maxwell/location.h" #include "shader_recompiler/frontend/maxwell/location.h"
#include "shader_recompiler/frontend/maxwell/opcodes.h" #include "shader_recompiler/frontend/maxwell/opcodes.h"
#include "shader_recompiler/object_pool.h"
namespace Shader::IR {
class Block;
}
namespace Shader::Maxwell::Flow { namespace Shader::Maxwell::Flow {
using BlockId = u32;
using FunctionId = size_t; using FunctionId = size_t;
constexpr BlockId UNREACHABLE_BLOCK_ID{static_cast<u32>(-1)};
enum class EndClass { enum class EndClass {
Branch, Branch,
Exit, Exit,
Return, Return,
Unreachable,
}; };
enum class Token { enum class Token {
@ -59,58 +61,37 @@ private:
boost::container::small_vector<StackEntry, 3> entries; boost::container::small_vector<StackEntry, 3> entries;
}; };
struct Block { struct Block : boost::intrusive::set_base_hook<
// Normal link is ~2.5% faster compared to safe link
boost::intrusive::link_mode<boost::intrusive::normal_link>> {
[[nodiscard]] bool Contains(Location pc) const noexcept; [[nodiscard]] bool Contains(Location pc) const noexcept;
bool operator<(const Block& rhs) const noexcept {
return begin < rhs.begin;
}
Location begin; Location begin;
Location end; Location end;
EndClass end_class; EndClass end_class;
BlockId id;
Stack stack; Stack stack;
IR::Condition cond; IR::Condition cond;
BlockId branch_true; Block* branch_true;
BlockId branch_false; Block* branch_false;
boost::container::small_vector<BlockId, 4> imm_predecessors; IR::Block* ir;
boost::container::small_vector<BlockId, 8> dominance_frontiers;
union {
bool post_order_visited{false};
Block* imm_dominator;
};
}; };
struct Label { struct Label {
Location address; Location address;
BlockId block_id; Block* block;
Stack stack; Stack stack;
}; };
struct Function { struct Function {
Function(Location start_address); Function(Location start_address);
void BuildBlocksMap();
void BuildImmediatePredecessors();
void BuildPostOrder();
void BuildImmediateDominators();
void BuildDominanceFrontier();
[[nodiscard]] size_t NumBlocks() const noexcept {
return static_cast<size_t>(current_block_id) + 1;
}
Location entrypoint; Location entrypoint;
BlockId current_block_id{0};
boost::container::small_vector<Label, 16> labels; boost::container::small_vector<Label, 16> labels;
boost::container::small_vector<u32, 0x130> blocks; boost::intrusive::set<Block> blocks;
boost::container::small_vector<Block, 0x130> blocks_data;
// Translates from BlockId to block index
boost::container::small_vector<Block*, 0x130> blocks_map;
boost::container::small_vector<u32, 0x130> post_order_blocks;
boost::container::small_vector<BlockId, 0x130> post_order_map;
}; };
class CFG { class CFG {
@ -120,7 +101,7 @@ class CFG {
}; };
public: public:
explicit CFG(Environment& env, Location start_address); explicit CFG(Environment& env, ObjectPool<Block>& block_pool, Location start_address);
CFG& operator=(const CFG&) = delete; CFG& operator=(const CFG&) = delete;
CFG(const CFG&) = delete; CFG(const CFG&) = delete;
@ -133,35 +114,37 @@ public:
[[nodiscard]] std::span<const Function> Functions() const noexcept { [[nodiscard]] std::span<const Function> Functions() const noexcept {
return std::span(functions.data(), functions.size()); return std::span(functions.data(), functions.size());
} }
[[nodiscard]] std::span<Function> Functions() noexcept {
return std::span(functions.data(), functions.size());
}
private: private:
void VisitFunctions(Location start_address);
void AnalyzeLabel(FunctionId function_id, Label& label); void AnalyzeLabel(FunctionId function_id, Label& label);
/// Inspect already visited blocks. /// Inspect already visited blocks.
/// Return true when the block has already been visited /// Return true when the block has already been visited
bool InspectVisitedBlocks(FunctionId function_id, const Label& label); bool InspectVisitedBlocks(FunctionId function_id, const Label& label);
AnalysisState AnalyzeInst(Block& block, FunctionId function_id, Location pc); AnalysisState AnalyzeInst(Block* block, FunctionId function_id, Location pc);
void AnalyzeCondInst(Block& block, FunctionId function_id, Location pc, EndClass insn_end_class, void AnalyzeCondInst(Block* block, FunctionId function_id, Location pc, EndClass insn_end_class,
IR::Condition cond); IR::Condition cond);
/// Return true when the branch instruction is confirmed to be a branch /// Return true when the branch instruction is confirmed to be a branch
bool AnalyzeBranch(Block& block, FunctionId function_id, Location pc, Instruction inst, bool AnalyzeBranch(Block* block, FunctionId function_id, Location pc, Instruction inst,
Opcode opcode); Opcode opcode);
void AnalyzeBRA(Block& block, FunctionId function_id, Location pc, Instruction inst, void AnalyzeBRA(Block* block, FunctionId function_id, Location pc, Instruction inst,
bool is_absolute); bool is_absolute);
void AnalyzeBRX(Block& block, Location pc, Instruction inst, bool is_absolute); void AnalyzeBRX(Block* block, Location pc, Instruction inst, bool is_absolute);
void AnalyzeCAL(Location pc, Instruction inst, bool is_absolute); void AnalyzeCAL(Location pc, Instruction inst, bool is_absolute);
AnalysisState AnalyzeEXIT(Block& block, FunctionId function_id, Location pc, Instruction inst); AnalysisState AnalyzeEXIT(Block* block, FunctionId function_id, Location pc, Instruction inst);
/// Return the branch target block id /// Return the branch target block id
BlockId AddLabel(const Block& block, Stack stack, Location pc, FunctionId function_id); Block* AddLabel(Block* block, Stack stack, Location pc, FunctionId function_id);
Environment& env; Environment& env;
ObjectPool<Block>& block_pool;
boost::container::small_vector<Function, 1> functions; boost::container::small_vector<Function, 1> functions;
FunctionId current_function_id{0}; FunctionId current_function_id{0};
}; };

12
src/shader_recompiler/frontend/maxwell/location.h
View file

@ -15,7 +15,7 @@
namespace Shader::Maxwell { namespace Shader::Maxwell {
class Location { class Location {
static constexpr u32 VIRTUAL_OFFSET{std::numeric_limits<u32>::max()}; static constexpr u32 VIRTUAL_BIAS{4};
public: public:
constexpr Location() = default; constexpr Location() = default;
@ -27,12 +27,18 @@ public:
Align(); Align();
} }
constexpr Location Virtual() const noexcept {
Location virtual_location;
virtual_location.offset = offset - VIRTUAL_BIAS;
return virtual_location;
}
[[nodiscard]] constexpr u32 Offset() const noexcept { [[nodiscard]] constexpr u32 Offset() const noexcept {
return offset; return offset;
} }
[[nodiscard]] constexpr bool IsVirtual() const { [[nodiscard]] constexpr bool IsVirtual() const {
return offset == VIRTUAL_OFFSET; return offset % 8 == VIRTUAL_BIAS;
} }
constexpr auto operator<=>(const Location&) const noexcept = default; constexpr auto operator<=>(const Location&) const noexcept = default;
@ -89,7 +95,7 @@ private:
offset -= 8 + (offset % 32 == 8 ? 8 : 0); offset -= 8 + (offset % 32 == 8 ? 8 : 0);
} }
u32 offset{VIRTUAL_OFFSET}; u32 offset{0xcccccccc};
}; };
} // namespace Shader::Maxwell } // namespace Shader::Maxwell

67
src/shader_recompiler/frontend/maxwell/program.cpp
View file

@ -4,57 +4,58 @@
#include <algorithm> #include <algorithm>
#include <memory> #include <memory>
#include <vector>
#include "shader_recompiler/frontend/ir/basic_block.h" #include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/ir/structured_control_flow.h"
#include "shader_recompiler/frontend/maxwell/program.h" #include "shader_recompiler/frontend/maxwell/program.h"
#include "shader_recompiler/frontend/maxwell/termination_code.h"
#include "shader_recompiler/frontend/maxwell/translate/translate.h" #include "shader_recompiler/frontend/maxwell/translate/translate.h"
#include "shader_recompiler/ir_opt/passes.h" #include "shader_recompiler/ir_opt/passes.h"
namespace Shader::Maxwell { namespace Shader::Maxwell {
namespace { namespace {
void TranslateCode(ObjectPool<IR::Inst>& inst_pool, ObjectPool<IR::Block>& block_pool, IR::BlockList TranslateCode(ObjectPool<IR::Inst>& inst_pool, ObjectPool<IR::Block>& block_pool,
Environment& env, const Flow::Function& cfg_function, IR::Function& function, Environment& env, Flow::Function& cfg_function) {
std::span<IR::Block*> block_map) {
const size_t num_blocks{cfg_function.blocks.size()}; const size_t num_blocks{cfg_function.blocks.size()};
function.blocks.reserve(num_blocks); std::vector<IR::Block*> blocks(cfg_function.blocks.size());
std::ranges::for_each(cfg_function.blocks, [&, i = size_t{0}](auto& cfg_block) mutable {
for (const Flow::BlockId block_id : cfg_function.blocks) { const u32 begin{cfg_block.begin.Offset()};
const Flow::Block& flow_block{cfg_function.blocks_data[block_id]}; const u32 end{cfg_block.end.Offset()};
blocks[i] = block_pool.Create(inst_pool, begin, end);
IR::Block* const ir_block{block_pool.Create(Translate(inst_pool, env, flow_block))}; cfg_block.ir = blocks[i];
block_map[flow_block.id] = ir_block; ++i;
function.blocks.emplace_back(ir_block); });
std::ranges::for_each(cfg_function.blocks, [&, i = size_t{0}](auto& cfg_block) mutable {
IR::Block* const block{blocks[i]};
++i;
if (cfg_block.end_class != Flow::EndClass::Branch) {
block->SetReturn();
} else if (cfg_block.cond == IR::Condition{true}) {
block->SetBranch(cfg_block.branch_true->ir);
} else if (cfg_block.cond == IR::Condition{false}) {
block->SetBranch(cfg_block.branch_false->ir);
} else {
block->SetBranches(cfg_block.cond, cfg_block.branch_true->ir,
cfg_block.branch_false->ir);
} }
} });
return IR::VisitAST(inst_pool, block_pool, blocks,
void EmitTerminationInsts(const Flow::Function& cfg_function, [&](IR::Block* block) { Translate(env, block); });
std::span<IR::Block* const> block_map) {
for (const Flow::BlockId block_id : cfg_function.blocks) {
const Flow::Block& flow_block{cfg_function.blocks_data[block_id]};
EmitTerminationCode(flow_block, block_map);
}
}
void TranslateFunction(ObjectPool<IR::Inst>& inst_pool, ObjectPool<IR::Block>& block_pool,
Environment& env, const Flow::Function& cfg_function,
IR::Function& function) {
std::vector<IR::Block*> block_map;
block_map.resize(cfg_function.blocks_data.size());
TranslateCode(inst_pool, block_pool, env, cfg_function, function, block_map);
EmitTerminationInsts(cfg_function, block_map);
} }
} // Anonymous namespace } // Anonymous namespace
IR::Program TranslateProgram(ObjectPool<IR::Inst>& inst_pool, ObjectPool<IR::Block>& block_pool, IR::Program TranslateProgram(ObjectPool<IR::Inst>& inst_pool, ObjectPool<IR::Block>& block_pool,
Environment& env, const Flow::CFG& cfg) { Environment& env, Flow::CFG& cfg) {
IR::Program program; IR::Program program;
auto& functions{program.functions}; auto& functions{program.functions};
functions.reserve(cfg.Functions().size()); functions.reserve(cfg.Functions().size());
for (const Flow::Function& cfg_function : cfg.Functions()) { for (Flow::Function& cfg_function : cfg.Functions()) {
TranslateFunction(inst_pool, block_pool, env, cfg_function, functions.emplace_back()); functions.push_back(IR::Function{
.blocks{TranslateCode(inst_pool, block_pool, env, cfg_function)},
});
} }
fmt::print(stdout, "No optimizations: {}", IR::DumpProgram(program));
std::ranges::for_each(functions, Optimization::SsaRewritePass); std::ranges::for_each(functions, Optimization::SsaRewritePass);
for (IR::Function& function : functions) { for (IR::Function& function : functions) {
Optimization::Invoke(Optimization::GlobalMemoryToStorageBufferPass, function); Optimization::Invoke(Optimization::GlobalMemoryToStorageBufferPass, function);

2
src/shader_recompiler/frontend/maxwell/program.h
View file

@ -19,6 +19,6 @@ namespace Shader::Maxwell {
[[nodiscard]] IR::Program TranslateProgram(ObjectPool<IR::Inst>& inst_pool, [[nodiscard]] IR::Program TranslateProgram(ObjectPool<IR::Inst>& inst_pool,
ObjectPool<IR::Block>& block_pool, Environment& env, ObjectPool<IR::Block>& block_pool, Environment& env,
const Flow::CFG& cfg); Flow::CFG& cfg);
} // namespace Shader::Maxwell } // namespace Shader::Maxwell

86
src/shader_recompiler/frontend/maxwell/termination_code.cpp
View file

@ -1,86 +0,0 @@
// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <span>
#include "shader_recompiler/exception.h"
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/ir/ir_emitter.h"
#include "shader_recompiler/frontend/maxwell/control_flow.h"
#include "shader_recompiler/frontend/maxwell/termination_code.h"
namespace Shader::Maxwell {
static void EmitExit(IR::IREmitter& ir) {
ir.Exit();
}
static IR::U1 GetFlowTest(IR::FlowTest flow_test, IR::IREmitter& ir) {
switch (flow_test) {
case IR::FlowTest::T:
return ir.Imm1(true);
case IR::FlowTest::F:
return ir.Imm1(false);
case IR::FlowTest::NE:
// FIXME: Verify this
return ir.LogicalNot(ir.GetZFlag());
case IR::FlowTest::NaN:
// FIXME: Verify this
return ir.LogicalAnd(ir.GetSFlag(), ir.GetZFlag());
default:
throw NotImplementedException("Flow test {}", flow_test);
}
}
static IR::U1 GetCond(IR::Condition cond, IR::IREmitter& ir) {
const IR::FlowTest flow_test{cond.FlowTest()};
const auto [pred, pred_negated]{cond.Pred()};
if (pred == IR::Pred::PT && !pred_negated) {
return GetFlowTest(flow_test, ir);
}
if (flow_test == IR::FlowTest::T) {
return ir.GetPred(pred, pred_negated);
}
return ir.LogicalAnd(ir.GetPred(pred, pred_negated), GetFlowTest(flow_test, ir));
}
static void EmitBranch(const Flow::Block& flow_block, std::span<IR::Block* const> block_map,
IR::IREmitter& ir) {
const auto add_immediate_predecessor = [&](Flow::BlockId label) {
block_map[label]->AddImmediatePredecessor(&ir.block);
};
if (flow_block.cond == true) {
add_immediate_predecessor(flow_block.branch_true);
return ir.Branch(block_map[flow_block.branch_true]);
}
if (flow_block.cond == false) {
add_immediate_predecessor(flow_block.branch_false);
return ir.Branch(block_map[flow_block.branch_false]);
}
add_immediate_predecessor(flow_block.branch_true);
add_immediate_predecessor(flow_block.branch_false);
return ir.BranchConditional(GetCond(flow_block.cond, ir), block_map[flow_block.branch_true],
block_map[flow_block.branch_false]);
}
void EmitTerminationCode(const Flow::Block& flow_block, std::span<IR::Block* const> block_map) {
IR::Block* const block{block_map[flow_block.id]};
IR::IREmitter ir(*block);
switch (flow_block.end_class) {
case Flow::EndClass::Branch:
EmitBranch(flow_block, block_map, ir);
break;
case Flow::EndClass::Exit:
EmitExit(ir);
break;
case Flow::EndClass::Return:
ir.Return();
break;
case Flow::EndClass::Unreachable:
ir.Unreachable();
break;
}
}
} // namespace Shader::Maxwell

17
src/shader_recompiler/frontend/maxwell/termination_code.h
View file

@ -1,17 +0,0 @@
// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <span>
#include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/maxwell/control_flow.h"
namespace Shader::Maxwell {
/// Emit termination instructions and collect immediate predecessors
void EmitTerminationCode(const Flow::Block& flow_block, std::span<IR::Block* const> block_map);
} // namespace Shader::Maxwell

2
src/shader_recompiler/frontend/maxwell/translate/impl/integer_shift_left.cpp
View file

@ -28,7 +28,7 @@ void SHL(TranslatorVisitor& v, u64 insn, const IR::U32& unsafe_shift) {
IR::U32 result; IR::U32 result;
if (shl.w != 0) { if (shl.w != 0) {
// When .W is set, the shift value is wrapped // When .W is set, the shift value is wrapped
// To emulate this we just have to clamp it ourselves. // To emulate this we just have to wrap it ourselves.
const IR::U32 shift{v.ir.BitwiseAnd(unsafe_shift, v.ir.Imm32(31))}; const IR::U32 shift{v.ir.BitwiseAnd(unsafe_shift, v.ir.Imm32(31))};
result = v.ir.ShiftLeftLogical(base, shift); result = v.ir.ShiftLeftLogical(base, shift);
} else { } else {

17
src/shader_recompiler/frontend/maxwell/translate/translate.cpp
View file

@ -23,14 +23,13 @@ static void Invoke(TranslatorVisitor& visitor, Location pc, u64 insn) {
} }
} }
IR::Block Translate(ObjectPool<IR::Inst>& inst_pool, Environment& env, void Translate(Environment& env, IR::Block* block) {
const Flow::Block& flow_block) { if (block->IsVirtual()) {
IR::Block block{inst_pool, flow_block.begin.Offset(), flow_block.end.Offset()}; return;
TranslatorVisitor visitor{env, block}; }
TranslatorVisitor visitor{env, *block};
const Location pc_end{flow_block.end}; const Location pc_end{block->LocationEnd()};
Location pc{flow_block.begin}; for (Location pc = block->LocationBegin(); pc != pc_end; ++pc) {
while (pc != pc_end) {
const u64 insn{env.ReadInstruction(pc.Offset())}; const u64 insn{env.ReadInstruction(pc.Offset())};
const Opcode opcode{Decode(insn)}; const Opcode opcode{Decode(insn)};
switch (opcode) { switch (opcode) {
@ -43,9 +42,7 @@ IR::Block Translate(ObjectPool<IR::Inst>& inst_pool, Environment& env,
default: default:
throw LogicError("Invalid opcode {}", opcode); throw LogicError("Invalid opcode {}", opcode);
} }
++pc;
} }
return block;
} }
} // namespace Shader::Maxwell } // namespace Shader::Maxwell

7
src/shader_recompiler/frontend/maxwell/translate/translate.h
View file

@ -6,14 +6,9 @@
#include "shader_recompiler/environment.h" #include "shader_recompiler/environment.h"
#include "shader_recompiler/frontend/ir/basic_block.h" #include "shader_recompiler/frontend/ir/basic_block.h"
#include "shader_recompiler/frontend/ir/microinstruction.h"
#include "shader_recompiler/frontend/maxwell/control_flow.h"
#include "shader_recompiler/frontend/maxwell/location.h"
#include "shader_recompiler/object_pool.h"
namespace Shader::Maxwell { namespace Shader::Maxwell {
[[nodiscard]] IR::Block Translate(ObjectPool<IR::Inst>& inst_pool, Environment& env, void Translate(Environment& env, IR::Block* block);
const Flow::Block& flow_block);
} // namespace Shader::Maxwell } // namespace Shader::Maxwell

50
src/shader_recompiler/ir_opt/constant_propagation_pass.cpp
View file

@ -132,6 +132,32 @@ void FoldLogicalAnd(IR::Inst& inst) {
} }
} }
void FoldLogicalOr(IR::Inst& inst) {
if (!FoldCommutative(inst, [](bool a, bool b) { return a || b; })) {
return;
}
const IR::Value rhs{inst.Arg(1)};
if (rhs.IsImmediate()) {
if (rhs.U1()) {
inst.ReplaceUsesWith(IR::Value{true});
} else {
inst.ReplaceUsesWith(inst.Arg(0));
}
}
}
void FoldLogicalNot(IR::Inst& inst) {
const IR::U1 value{inst.Arg(0)};
if (value.IsImmediate()) {
inst.ReplaceUsesWith(IR::Value{!value.U1()});
return;
}
IR::Inst* const arg{value.InstRecursive()};
if (arg->Opcode() == IR::Opcode::LogicalNot) {
inst.ReplaceUsesWith(arg->Arg(0));
}
}
template <typename Dest, typename Source> template <typename Dest, typename Source>
void FoldBitCast(IR::Inst& inst, IR::Opcode reverse) { void FoldBitCast(IR::Inst& inst, IR::Opcode reverse) {
const IR::Value value{inst.Arg(0)}; const IR::Value value{inst.Arg(0)};
@ -160,6 +186,24 @@ void FoldWhenAllImmediates(IR::Inst& inst, Func&& func) {
inst.ReplaceUsesWith(EvalImmediates(inst, func, Indices{})); inst.ReplaceUsesWith(EvalImmediates(inst, func, Indices{}));
} }
void FoldBranchConditional(IR::Inst& inst) {
const IR::U1 cond{inst.Arg(0)};
if (cond.IsImmediate()) {
// TODO: Convert to Branch
return;
}
const IR::Inst* cond_inst{cond.InstRecursive()};
if (cond_inst->Opcode() == IR::Opcode::LogicalNot) {
const IR::Value true_label{inst.Arg(1)};
const IR::Value false_label{inst.Arg(2)};
// Remove negation on the conditional (take the parameter out of LogicalNot) and swap
// the branches
inst.SetArg(0, cond_inst->Arg(0));
inst.SetArg(1, false_label);
inst.SetArg(2, true_label);
}
}
void ConstantPropagation(IR::Inst& inst) { void ConstantPropagation(IR::Inst& inst) {
switch (inst.Opcode()) { switch (inst.Opcode()) {
case IR::Opcode::GetRegister: case IR::Opcode::GetRegister:
@ -178,6 +222,10 @@ void ConstantPropagation(IR::Inst& inst) {
return FoldSelect<u32>(inst); return FoldSelect<u32>(inst);
case IR::Opcode::LogicalAnd: case IR::Opcode::LogicalAnd:
return FoldLogicalAnd(inst); return FoldLogicalAnd(inst);
case IR::Opcode::LogicalOr:
return FoldLogicalOr(inst);
case IR::Opcode::LogicalNot:
return FoldLogicalNot(inst);
case IR::Opcode::ULessThan: case IR::Opcode::ULessThan:
return FoldWhenAllImmediates(inst, [](u32 a, u32 b) { return a < b; }); return FoldWhenAllImmediates(inst, [](u32 a, u32 b) { return a < b; });
case IR::Opcode::BitFieldUExtract: case IR::Opcode::BitFieldUExtract:
@ -188,6 +236,8 @@ void ConstantPropagation(IR::Inst& inst) {
} }
return (base >> shift) & ((1U << count) - 1); return (base >> shift) & ((1U << count) - 1);
}); });
case IR::Opcode::BranchConditional:
return FoldBranchConditional(inst);
default: default:
break; break;
} }

24
src/shader_recompiler/ir_opt/ssa_rewrite_pass.cpp
View file

@ -34,6 +34,13 @@ struct SignFlagTag : FlagTag {};
struct CarryFlagTag : FlagTag {}; struct CarryFlagTag : FlagTag {};
struct OverflowFlagTag : FlagTag {}; struct OverflowFlagTag : FlagTag {};
struct GotoVariable : FlagTag {
GotoVariable() = default;
explicit GotoVariable(u32 index_) : index{index_} {}
u32 index;
};
struct DefTable { struct DefTable {
[[nodiscard]] ValueMap& operator[](IR::Reg variable) noexcept { [[nodiscard]] ValueMap& operator[](IR::Reg variable) noexcept {
return regs[IR::RegIndex(variable)]; return regs[IR::RegIndex(variable)];
@ -43,6 +50,10 @@ struct DefTable {
return preds[IR::PredIndex(variable)]; return preds[IR::PredIndex(variable)];
} }
[[nodiscard]] ValueMap& operator[](GotoVariable goto_variable) {
return goto_vars[goto_variable.index];
}
[[nodiscard]] ValueMap& operator[](ZeroFlagTag) noexcept { [[nodiscard]] ValueMap& operator[](ZeroFlagTag) noexcept {
return zero_flag; return zero_flag;
} }
@ -61,6 +72,7 @@ struct DefTable {
std::array<ValueMap, IR::NUM_USER_REGS> regs; std::array<ValueMap, IR::NUM_USER_REGS> regs;
std::array<ValueMap, IR::NUM_USER_PREDS> preds; std::array<ValueMap, IR::NUM_USER_PREDS> preds;
boost::container::flat_map<u32, ValueMap> goto_vars;
ValueMap zero_flag; ValueMap zero_flag;
ValueMap sign_flag; ValueMap sign_flag;
ValueMap carry_flag; ValueMap carry_flag;
@ -68,15 +80,15 @@ struct DefTable {
}; };
IR::Opcode UndefOpcode(IR::Reg) noexcept { IR::Opcode UndefOpcode(IR::Reg) noexcept {
return IR::Opcode::Undef32; return IR::Opcode::UndefU32;
} }
IR::Opcode UndefOpcode(IR::Pred) noexcept { IR::Opcode UndefOpcode(IR::Pred) noexcept {
return IR::Opcode::Undef1; return IR::Opcode::UndefU1;
} }
IR::Opcode UndefOpcode(const FlagTag&) noexcept { IR::Opcode UndefOpcode(const FlagTag&) noexcept {
return IR::Opcode::Undef1; return IR::Opcode::UndefU1;
} }
[[nodiscard]] bool IsPhi(const IR::Inst& inst) noexcept { [[nodiscard]] bool IsPhi(const IR::Inst& inst) noexcept {
@ -165,6 +177,9 @@ void SsaRewritePass(IR::Function& function) {
pass.WriteVariable(pred, block, inst.Arg(1)); pass.WriteVariable(pred, block, inst.Arg(1));
} }
break; break;
case IR::Opcode::SetGotoVariable:
pass.WriteVariable(GotoVariable{inst.Arg(0).U32()}, block, inst.Arg(1));
break;
case IR::Opcode::SetZFlag: case IR::Opcode::SetZFlag:
pass.WriteVariable(ZeroFlagTag{}, block, inst.Arg(0)); pass.WriteVariable(ZeroFlagTag{}, block, inst.Arg(0));
break; break;
@ -187,6 +202,9 @@ void SsaRewritePass(IR::Function& function) {
inst.ReplaceUsesWith(pass.ReadVariable(pred, block)); inst.ReplaceUsesWith(pass.ReadVariable(pred, block));
} }
break; break;
case IR::Opcode::GetGotoVariable:
inst.ReplaceUsesWith(pass.ReadVariable(GotoVariable{inst.Arg(0).U32()}, block));
break;
case IR::Opcode::GetZFlag: case IR::Opcode::GetZFlag:
inst.ReplaceUsesWith(pass.ReadVariable(ZeroFlagTag{}, block)); inst.ReplaceUsesWith(pass.ReadVariable(ZeroFlagTag{}, block));
break; break;

4
src/shader_recompiler/ir_opt/verification_pass.cpp
View file

@ -14,6 +14,10 @@ namespace Shader::Optimization {
static void ValidateTypes(const IR::Function& function) { static void ValidateTypes(const IR::Function& function) {
for (const auto& block : function.blocks) { for (const auto& block : function.blocks) {
for (const IR::Inst& inst : *block) { for (const IR::Inst& inst : *block) {
if (inst.Opcode() == IR::Opcode::Phi) {
// Skip validation on phi nodes
continue;
}
const size_t num_args{inst.NumArgs()}; const size_t num_args{inst.NumArgs()};
for (size_t i = 0; i < num_args; ++i) { for (size_t i = 0; i < num_args; ++i) {
const IR::Type t1{inst.Arg(i).Type()}; const IR::Type t1{inst.Arg(i).Type()};

29
src/shader_recompiler/main.cpp
View file

@ -2,6 +2,7 @@
// Licensed under GPLv2 or any later version // Licensed under GPLv2 or any later version
// Refer to the license.txt file included. // Refer to the license.txt file included.
#include <chrono>
#include <filesystem> #include <filesystem>
#include <fmt/format.h> #include <fmt/format.h>
@ -36,34 +37,46 @@ void RunDatabase() {
ForEachFile("D:\\Shaders\\Database", [&](const std::filesystem::path& path) { ForEachFile("D:\\Shaders\\Database", [&](const std::filesystem::path& path) {
map.emplace_back(std::make_unique<FileEnvironment>(path.string().c_str())); map.emplace_back(std::make_unique<FileEnvironment>(path.string().c_str()));
}); });
for (int i = 0; i < 300; ++i) { auto block_pool{std::make_unique<ObjectPool<Flow::Block>>()};
auto t0 = std::chrono::high_resolution_clock::now();
int N = 1;
int n = 0;
for (int i = 0; i < N; ++i) {
for (auto& env : map) { for (auto& env : map) {
++n;
// fmt::print(stdout, "Decoding {}\n", path.string()); // fmt::print(stdout, "Decoding {}\n", path.string());
const Location start_address{0}; const Location start_address{0};
auto cfg{std::make_unique<Flow::CFG>(*env, start_address)}; block_pool->ReleaseContents();
Flow::CFG cfg{*env, *block_pool, start_address};
// fmt::print(stdout, "{}\n", cfg->Dot()); // fmt::print(stdout, "{}\n", cfg->Dot());
// IR::Program program{env, cfg}; // IR::Program program{env, cfg};
// Optimize(program); // Optimize(program);
// const std::string code{EmitGLASM(program)}; // const std::string code{EmitGLASM(program)};
} }
} }
auto t = std::chrono::high_resolution_clock::now();
fmt::print(stdout, "{} ms",
std::chrono::duration_cast<std::chrono::milliseconds>(t - t0).count() / double(N));
} }
int main() { int main() {
// RunDatabase(); // RunDatabase();
auto flow_block_pool{std::make_unique<ObjectPool<Flow::Block>>()};
auto inst_pool{std::make_unique<ObjectPool<IR::Inst>>()}; auto inst_pool{std::make_unique<ObjectPool<IR::Inst>>()};
auto block_pool{std::make_unique<ObjectPool<IR::Block>>()}; auto block_pool{std::make_unique<ObjectPool<IR::Block>>()};
// FileEnvironment env{"D:\\Shaders\\Database\\test.bin"}; FileEnvironment env{"D:\\Shaders\\Database\\Oninaki\\CS8F146B41DB6BD826.bin"};
FileEnvironment env{"D:\\Shaders\\Database\\Oninaki\\CS15C2FB1F0B965767.bin"}; // FileEnvironment env{"D:\\Shaders\\shader.bin"};
for (int i = 0; i < 1; ++i) { for (int i = 0; i < 1; ++i) {
block_pool->ReleaseContents(); block_pool->ReleaseContents();
inst_pool->ReleaseContents(); inst_pool->ReleaseContents();
auto cfg{std::make_unique<Flow::CFG>(env, 0)}; flow_block_pool->ReleaseContents();
// fmt::print(stdout, "{}\n", cfg->Dot()); Flow::CFG cfg{env, *flow_block_pool, 0};
IR::Program program{TranslateProgram(*inst_pool, *block_pool, env, *cfg)}; fmt::print(stdout, "{}\n", cfg.Dot());
// fmt::print(stdout, "{}\n", IR::DumpProgram(program)); IR::Program program{TranslateProgram(*inst_pool, *block_pool, env, cfg)};
fmt::print(stdout, "{}\n", IR::DumpProgram(program));
Backend::SPIRV::EmitSPIRV spirv{program}; Backend::SPIRV::EmitSPIRV spirv{program};
} }
} }

28
src/shader_recompiler/shader_info.h Normal file
View file

@ -0,0 +1,28 @@
// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include <boost/container/static_vector.hpp>
namespace Shader {
struct Info {
struct ConstantBuffer {
};
struct {
bool workgroup_id{};
bool local_invocation_id{};
bool fp16{};
bool fp64{};
} uses;
std::array<18
};
} // namespace Shader