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shader_ir: Declare Manager and pass it to appropiate programs.

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This commit is contained in:
Fernando Sahmkow 2019-06-28 22:59:43 -04:00 committed by FernandoS27
parent 8be6e1c522
commit 6fdd501113
7 changed files with 214 additions and 104 deletions
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139
src/video_core/shader/ast.cpp
View file

@ -363,6 +363,71 @@ std::string ASTManager::Print() {
return printer.GetResult();
}
ASTManager::ASTManager() = default;
ASTManager::~ASTManager() {
Clear();
}
void ASTManager::Init() {
main_node = ASTBase::Make<ASTProgram>(ASTNode{});
program = std::get_if<ASTProgram>(main_node->GetInnerData());
true_condition = MakeExpr<ExprBoolean>(true);
}
ASTManager::ASTManager(ASTManager&& other)
: labels_map(std::move(other.labels_map)), labels_count{other.labels_count},
gotos(std::move(other.gotos)), labels(std::move(other.labels)), variables{other.variables},
program{other.program}, main_node{other.main_node}, true_condition{other.true_condition} {
other.main_node.reset();
}
ASTManager& ASTManager::operator=(ASTManager&& other) {
labels_map = std::move(other.labels_map);
labels_count = other.labels_count;
gotos = std::move(other.gotos);
labels = std::move(other.labels);
variables = other.variables;
program = other.program;
main_node = other.main_node;
true_condition = other.true_condition;
other.main_node.reset();
return *this;
}
void ASTManager::DeclareLabel(u32 address) {
const auto pair = labels_map.emplace(address, labels_count);
if (pair.second) {
labels_count++;
labels.resize(labels_count);
}
}
void ASTManager::InsertLabel(u32 address) {
u32 index = labels_map[address];
ASTNode label = ASTBase::Make<ASTLabel>(main_node, index);
labels[index] = label;
program->nodes.PushBack(label);
}
void ASTManager::InsertGoto(Expr condition, u32 address) {
u32 index = labels_map[address];
ASTNode goto_node = ASTBase::Make<ASTGoto>(main_node, condition, index);
gotos.push_back(goto_node);
program->nodes.PushBack(goto_node);
}
void ASTManager::InsertBlock(u32 start_address, u32 end_address) {
ASTNode block = ASTBase::Make<ASTBlockEncoded>(main_node, start_address, end_address);
program->nodes.PushBack(block);
}
void ASTManager::InsertReturn(Expr condition, bool kills) {
ASTNode node = ASTBase::Make<ASTReturn>(main_node, condition, kills);
program->nodes.PushBack(node);
}
void ASTManager::Decompile() {
auto it = gotos.begin();
while (it != gotos.end()) {
@ -460,7 +525,6 @@ void ASTManager::SanityCheck() {
void ASTManager::EncloseDoWhile(ASTNode goto_node, ASTNode label) {
// ShowCurrentState("Before DoWhile Enclose");
enclose_count++;
ASTZipper& zipper = goto_node->GetManager();
ASTNode loop_start = label->GetNext();
if (loop_start == goto_node) {
@ -481,7 +545,6 @@ void ASTManager::EncloseDoWhile(ASTNode goto_node, ASTNode label) {
void ASTManager::EncloseIfThen(ASTNode goto_node, ASTNode label) {
// ShowCurrentState("Before IfThen Enclose");
enclose_count++;
ASTZipper& zipper = goto_node->GetManager();
ASTNode if_end = label->GetPrevious();
if (if_end == goto_node) {
@ -514,7 +577,6 @@ void ASTManager::EncloseIfThen(ASTNode goto_node, ASTNode label) {
void ASTManager::MoveOutward(ASTNode goto_node) {
// ShowCurrentState("Before MoveOutward");
outward_count++;
ASTZipper& zipper = goto_node->GetManager();
ASTNode parent = goto_node->GetParent();
ASTZipper& zipper2 = parent->GetManager();
@ -582,4 +644,75 @@ void ASTManager::MoveOutward(ASTNode goto_node) {
// ShowCurrentState("After MoveOutward");
}
class ASTClearer {
public:
ASTClearer() = default;
void operator()(ASTProgram& ast) {
ASTNode current = ast.nodes.GetFirst();
while (current) {
Visit(current);
current = current->GetNext();
}
}
void operator()(ASTIfThen& ast) {
ASTNode current = ast.nodes.GetFirst();
while (current) {
Visit(current);
current = current->GetNext();
}
}
void operator()(ASTIfElse& ast) {
ASTNode current = ast.nodes.GetFirst();
while (current) {
Visit(current);
current = current->GetNext();
}
}
void operator()(ASTBlockEncoded& ast) {}
void operator()(ASTBlockDecoded& ast) {
ast.nodes.clear();
}
void operator()(ASTVarSet& ast) {}
void operator()(ASTLabel& ast) {}
void operator()(ASTGoto& ast) {}
void operator()(ASTDoWhile& ast) {
ASTNode current = ast.nodes.GetFirst();
while (current) {
Visit(current);
current = current->GetNext();
}
}
void operator()(ASTReturn& ast) {}
void operator()(ASTBreak& ast) {}
void Visit(ASTNode& node) {
std::visit(*this, *node->GetInnerData());
node->Clear();
}
};
void ASTManager::Clear() {
if (!main_node) {
return;
}
ASTClearer clearer{};
clearer.Visit(main_node);
main_node.reset();
program = nullptr;
labels_map.clear();
labels.clear();
gotos.clear();
}
} // namespace VideoCommon::Shader

74
src/video_core/shader/ast.h
View file

@ -30,8 +30,8 @@ class ASTDoWhile;
class ASTReturn;
class ASTBreak;
using ASTData = std::variant<ASTProgram, ASTIfThen, ASTIfElse, ASTBlockEncoded, ASTBlockDecoded, ASTVarSet, ASTGoto,
ASTLabel, ASTDoWhile, ASTReturn, ASTBreak>;
using ASTData = std::variant<ASTProgram, ASTIfThen, ASTIfElse, ASTBlockEncoded, ASTBlockDecoded,
ASTVarSet, ASTGoto, ASTLabel, ASTDoWhile, ASTReturn, ASTBreak>;
using ASTNode = std::shared_ptr<ASTBase>;
@ -261,6 +261,13 @@ public:
return nullptr;
}
void Clear() {
next.reset();
previous.reset();
parent.reset();
manager = nullptr;
}
private:
friend class ASTZipper;
@ -273,43 +280,26 @@ private:
class ASTManager final {
public:
explicit ASTManager() {
main_node = ASTBase::Make<ASTProgram>(ASTNode{});
program = std::get_if<ASTProgram>(main_node->GetInnerData());
true_condition = MakeExpr<ExprBoolean>(true);
}
ASTManager();
~ASTManager();
void DeclareLabel(u32 address) {
const auto pair = labels_map.emplace(address, labels_count);
if (pair.second) {
labels_count++;
labels.resize(labels_count);
}
}
ASTManager(const ASTManager& o) = delete;
ASTManager& operator=(const ASTManager& other) = delete;
void InsertLabel(u32 address) {
u32 index = labels_map[address];
ASTNode label = ASTBase::Make<ASTLabel>(main_node, index);
labels[index] = label;
program->nodes.PushBack(label);
}
ASTManager(ASTManager&& other);
ASTManager& operator=(ASTManager&& other);
void InsertGoto(Expr condition, u32 address) {
u32 index = labels_map[address];
ASTNode goto_node = ASTBase::Make<ASTGoto>(main_node, condition, index);
gotos.push_back(goto_node);
program->nodes.PushBack(goto_node);
}
void Init();
void InsertBlock(u32 start_address, u32 end_address) {
ASTNode block = ASTBase::Make<ASTBlockEncoded>(main_node, start_address, end_address);
program->nodes.PushBack(block);
}
void DeclareLabel(u32 address);
void InsertReturn(Expr condition, bool kills) {
ASTNode node = ASTBase::Make<ASTReturn>(main_node, condition, kills);
program->nodes.PushBack(node);
}
void InsertLabel(u32 address);
void InsertGoto(Expr condition, u32 address);
void InsertBlock(u32 start_address, u32 end_address);
void InsertReturn(Expr condition, bool kills);
std::string Print();
@ -323,6 +313,12 @@ public:
return gotos.size() == 0;
}
ASTNode GetProgram() {
return main_node;
}
void Clear();
private:
bool IndirectlyRelated(ASTNode first, ASTNode second);
@ -332,7 +328,7 @@ private:
void EncloseIfThen(ASTNode goto_node, ASTNode label);
void MoveOutward(ASTNode goto_node) ;
void MoveOutward(ASTNode goto_node);
u32 NewVariable() {
u32 new_var = variables;
@ -345,11 +341,9 @@ private:
std::vector<ASTNode> labels{};
std::list<ASTNode> gotos{};
u32 variables{};
ASTProgram* program;
ASTNode main_node;
Expr true_condition;
u32 outward_count{};
u32 enclose_count{};
ASTProgram* program{};
ASTNode main_node{};
Expr true_condition{};
};
} // namespace VideoCommon::Shader

65
src/video_core/shader/control_flow.cpp
View file

@ -57,8 +57,8 @@ struct BlockInfo {
struct CFGRebuildState {
explicit CFGRebuildState(const ProgramCode& program_code, const std::size_t program_size,
const u32 start)
: start{start}, program_code{program_code}, program_size{program_size} {}
const u32 start, ASTManager& manager)
: program_code{program_code}, program_size{program_size}, start{start}, manager{manager} {}
u32 start{};
std::vector<BlockInfo> block_info{};
@ -71,6 +71,7 @@ struct CFGRebuildState {
std::unordered_map<u32, BlockStack> stacks{};
const ProgramCode& program_code;
const std::size_t program_size;
ASTManager& manager;
};
enum class BlockCollision : u32 { None, Found, Inside };
@ -455,29 +456,28 @@ void InsertBranch(ASTManager& mm, const BlockBranchInfo& branch) {
}
void DecompileShader(CFGRebuildState& state) {
ASTManager manager{};
state.manager.Init();
for (auto label : state.labels) {
manager.DeclareLabel(label);
state.manager.DeclareLabel(label);
}
for (auto& block : state.block_info) {
if (state.labels.count(block.start) != 0) {
manager.InsertLabel(block.start);
state.manager.InsertLabel(block.start);
}
u32 end = block.branch.ignore ? block.end + 1 : block.end;
manager.InsertBlock(block.start, end);
state.manager.InsertBlock(block.start, end);
if (!block.branch.ignore) {
InsertBranch(manager, block.branch);
InsertBranch(state.manager, block.branch);
}
}
//manager.ShowCurrentState("Before Decompiling");
manager.Decompile();
//manager.ShowCurrentState("After Decompiling");
// state.manager.ShowCurrentState("Before Decompiling");
state.manager.Decompile();
// state.manager.ShowCurrentState("After Decompiling");
}
std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code,
std::size_t program_size, u32 start_address) {
CFGRebuildState state{program_code, program_size, start_address};
std::unique_ptr<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code, u32 program_size,
u32 start_address, ASTManager& manager) {
CFGRebuildState state{program_code, program_size, start_address, manager};
// Inspect Code and generate blocks
state.labels.clear();
state.labels.emplace(start_address);
@ -503,12 +503,21 @@ std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code,
[](const BlockInfo& a, const BlockInfo& b) -> bool { return a.start < b.start; });
if (decompiled) {
DecompileShader(state);
decompiled = state.manager.IsFullyDecompiled();
if (!decompiled) {
LOG_CRITICAL(HW_GPU, "Failed to remove all the gotos!:");
state.manager.ShowCurrentState("Of Shader");
state.manager.Clear();
}
}
ShaderCharacteristics result_out{};
result_out.decompilable = decompiled;
result_out.start = start_address;
result_out.end = start_address;
for (const auto& block : state.block_info) {
auto result_out = std::make_unique<ShaderCharacteristics>();
result_out->decompiled = decompiled;
result_out->start = start_address;
if (decompiled) {
result_out->end = state.block_info.back().end + 1;
return std::move(result_out);
}
for (auto& block : state.block_info) {
ShaderBlock new_block{};
new_block.start = block.start;
new_block.end = block.end;
@ -518,26 +527,20 @@ std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code,
new_block.branch.kills = block.branch.kill;
new_block.branch.address = block.branch.address;
}
result_out.end = std::max(result_out.end, block.end);
result_out.blocks.push_back(new_block);
result_out->end = std::max(result_out->end, block.end);
result_out->blocks.push_back(new_block);
}
if (result_out.decompilable) {
result_out.labels = std::move(state.labels);
return {std::move(result_out)};
}
// If it's not decompilable, merge the unlabelled blocks together
auto back = result_out.blocks.begin();
auto back = result_out->blocks.begin();
auto next = std::next(back);
while (next != result_out.blocks.end()) {
while (next != result_out->blocks.end()) {
if (state.labels.count(next->start) == 0 && next->start == back->end + 1) {
back->end = next->end;
next = result_out.blocks.erase(next);
next = result_out->blocks.erase(next);
continue;
}
back = next;
++next;
}
return {std::move(result_out)};
return std::move(result_out);
}
} // namespace VideoCommon::Shader

8
src/video_core/shader/control_flow.h
View file

@ -10,6 +10,7 @@
#include "video_core/engines/shader_bytecode.h"
#include "video_core/shader/shader_ir.h"
#include "video_core/shader/ast.h"
namespace VideoCommon::Shader {
@ -67,13 +68,12 @@ struct ShaderBlock {
struct ShaderCharacteristics {
std::list<ShaderBlock> blocks{};
bool decompilable{};
bool decompiled{};
u32 start{};
u32 end{};
std::set<u32> labels{};
};
std::optional<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code,
std::size_t program_size, u32 start_address);
std::unique_ptr<ShaderCharacteristics> ScanFlow(const ProgramCode& program_code, u32 program_size,
u32 start_address, ASTManager& manager);
} // namespace VideoCommon::Shader

28
src/video_core/shader/decode.cpp
View file

@ -39,36 +39,14 @@ void ShaderIR::Decode() {
std::memcpy(&header, program_code.data(), sizeof(Tegra::Shader::Header));
disable_flow_stack = false;
const auto info = ScanFlow(program_code, program_size, main_offset);
const auto info =
ScanFlow(program_code, program_size, main_offset, program_manager);
if (info) {
const auto& shader_info = *info;
coverage_begin = shader_info.start;
coverage_end = shader_info.end;
if (shader_info.decompilable) {
if (shader_info.decompiled) {
disable_flow_stack = true;
const auto insert_block = [this](NodeBlock& nodes, u32 label) {
if (label == static_cast<u32>(exit_branch)) {
return;
}
basic_blocks.insert({label, nodes});
};
const auto& blocks = shader_info.blocks;
NodeBlock current_block;
u32 current_label = static_cast<u32>(exit_branch);
for (auto& block : blocks) {
if (shader_info.labels.count(block.start) != 0) {
insert_block(current_block, current_label);
current_block.clear();
current_label = block.start;
}
if (!block.ignore_branch) {
DecodeRangeInner(current_block, block.start, block.end);
InsertControlFlow(current_block, block);
} else {
DecodeRangeInner(current_block, block.start, block.end + 1);
}
}
insert_block(current_block, current_label);
return;
}
LOG_WARNING(HW_GPU, "Flow Stack Removing Failed! Falling back to old method");

2
src/video_core/shader/shader_ir.cpp
View file

@ -23,7 +23,7 @@ using Tegra::Shader::PredOperation;
using Tegra::Shader::Register;
ShaderIR::ShaderIR(const ProgramCode& program_code, u32 main_offset, const std::size_t size)
: program_code{program_code}, main_offset{main_offset}, program_size{size} {
: program_code{program_code}, main_offset{main_offset}, program_size{size}, program_manager{} {
Decode();
}

2
src/video_core/shader/shader_ir.h
View file

@ -16,6 +16,7 @@
#include "video_core/engines/shader_bytecode.h"
#include "video_core/engines/shader_header.h"
#include "video_core/shader/node.h"
#include "video_core/shader/ast.h"
namespace VideoCommon::Shader {
@ -364,6 +365,7 @@ private:
std::map<u32, NodeBlock> basic_blocks;
NodeBlock global_code;
ASTManager program_manager;
std::set<u32> used_registers;
std::set<Tegra::Shader::Pred> used_predicates;