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shader_ir: Corrections to outward movements and misc stuffs

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This commit is contained in:
Fernando Sahmkow 2019-06-28 20:54:21 -04:00 • committed by FernandoS27
parent 9581919b87
commit 9f61500df1
8 changed files with 314 additions and 58 deletions
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185
src/video_core/shader/ast.cpp
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@ -12,18 +12,22 @@
namespace VideoCommon::Shader {
ASTZipper::ASTZipper() = default;
ASTZipper::ASTZipper(ASTNode new_first) : first{}, last{} {
void ASTZipper::Init(ASTNode new_first, ASTNode parent) {
ASSERT(new_first->manager == nullptr);
first = new_first;
last = new_first;
ASTNode current = first;
while (current) {
current->manager = this;
current->parent = parent;
last = current;
current = current->next;
}
}
void ASTZipper::PushBack(ASTNode new_node) {
ASSERT(new_node->manager == nullptr);
new_node->previous = last;
if (last) {
last->next = new_node;
@ -37,38 +41,55 @@ void ASTZipper::PushBack(ASTNode new_node) {
}
void ASTZipper::PushFront(ASTNode new_node) {
ASSERT(new_node->manager == nullptr);
new_node->previous.reset();
new_node->next = first;
if (first) {
first->previous = first;
first->previous = new_node;
}
first = new_node;
if (!last) {
if (last == first) {
last = new_node;
}
first = new_node;
new_node->manager = this;
}
void ASTZipper::InsertAfter(ASTNode new_node, ASTNode at_node) {
ASSERT(new_node->manager == nullptr);
if (!at_node) {
PushFront(new_node);
return;
}
ASTNode next = at_node->next;
if (next) {
next->previous = new_node;
}
new_node->previous = at_node;
if (at_node == last) {
last = new_node;
}
new_node->next = at_node->next;
new_node->next = next;
at_node->next = new_node;
new_node->manager = this;
}
void ASTZipper::SetParent(ASTNode new_parent) {
ASTNode current = first;
while (current) {
current->parent = new_parent;
current = current->next;
void ASTZipper::InsertBefore(ASTNode new_node, ASTNode at_node) {
ASSERT(new_node->manager == nullptr);
if (!at_node) {
PushBack(new_node);
return;
}
ASTNode previous = at_node->previous;
if (previous) {
previous->next = new_node;
}
new_node->next = at_node;
if (at_node == first) {
first = new_node;
}
new_node->previous = previous;
at_node->previous = new_node;
new_node->manager = this;
}
void ASTZipper::DetachTail(ASTNode node) {
@ -80,11 +101,22 @@ void ASTZipper::DetachTail(ASTNode node) {
}
last = node->previous;
last->next.reset();
node->previous.reset();
ASTNode current = node;
while (current) {
current->manager = nullptr;
current->parent.reset();
current = current->next;
}
}
void ASTZipper::DetachSegment(ASTNode start, ASTNode end) {
ASSERT(start->manager == this && end->manager == this);
if (start == end) {
DetachSingle(start);
return;
}
ASTNode prev = start->previous;
ASTNode post = end->next;
if (!prev) {
@ -131,7 +163,6 @@ void ASTZipper::DetachSingle(ASTNode node) {
node->parent.reset();
}
void ASTZipper::Remove(ASTNode node) {
ASSERT(node->manager == this);
ASTNode next = node->next;
@ -178,12 +209,7 @@ public:
}
void operator()(ExprPredicate const& expr) {
u32 pred = static_cast<u32>(expr.predicate);
if (pred > 7) {
inner += "!";
pred -= 8;
}
inner += "P" + std::to_string(pred);
inner += "P" + std::to_string(expr.predicate);
}
void operator()(ExprCondCode const& expr) {
@ -253,6 +279,10 @@ public:
");\n";
}
void operator()(ASTBlockDecoded& ast) {
inner += Ident() + "Block;\n";
}
void operator()(ASTVarSet& ast) {
ExprPrinter expr_parser{};
std::visit(expr_parser, *ast.condition);
@ -282,7 +312,7 @@ public:
current = current->GetNext();
}
scope--;
inner += Ident() + "} while (" + expr_parser.GetResult() + ")\n";
inner += Ident() + "} while (" + expr_parser.GetResult() + ");\n";
}
void operator()(ASTReturn& ast) {
@ -333,8 +363,6 @@ std::string ASTManager::Print() {
return printer.GetResult();
}
#pragma optimize("", off)
void ASTManager::Decompile() {
auto it = gotos.begin();
while (it != gotos.end()) {
@ -348,11 +376,12 @@ void ASTManager::Decompile() {
}
if (DirectlyRelated(goto_node, label)) {
u32 goto_level = goto_node->GetLevel();
u32 label_level = goto_node->GetLevel();
while (label_level > goto_level) {
u32 label_level = label->GetLevel();
while (label_level < goto_level) {
MoveOutward(goto_node);
goto_level++;
goto_level--;
}
// TODO(Blinkhawk): Implement Lifting and Inward Movements
}
if (label->GetParent() == goto_node->GetParent()) {
bool is_loop = false;
@ -375,13 +404,11 @@ void ASTManager::Decompile() {
}
it++;
}
/*
for (ASTNode label : labels) {
auto& manager = label->GetManager();
manager.Remove(label);
}
labels.clear();
*/
}
bool ASTManager::IndirectlyRelated(ASTNode first, ASTNode second) {
@ -410,87 +437,149 @@ bool ASTManager::DirectlyRelated(ASTNode first, ASTNode second) {
max = second;
}
while (min_level < max_level) {
min_level++;
min = min->GetParent();
while (max_level > min_level) {
max_level--;
max = max->GetParent();
}
return (min->GetParent() == max->GetParent());
}
void ASTManager::ShowCurrentState(std::string state) {
LOG_CRITICAL(HW_GPU, "\nState {}:\n\n{}\n", state, Print());
SanityCheck();
}
void ASTManager::SanityCheck() {
for (auto label : labels) {
if (!label->GetParent()) {
LOG_CRITICAL(HW_GPU, "Sanity Check Failed");
}
}
}
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) {
zipper.Remove(goto_node);
// ShowCurrentState("Ignore DoWhile Enclose");
return;
}
ASTNode parent = label->GetParent();
Expr condition = goto_node->GetGotoCondition();
zipper.DetachSegment(loop_start, goto_node);
ASTNode do_while_node = ASTBase::Make<ASTDoWhile>(parent, condition, ASTZipper(loop_start));
zipper.InsertAfter(do_while_node, label);
ASTNode do_while_node = ASTBase::Make<ASTDoWhile>(parent, condition);
ASTZipper* sub_zipper = do_while_node->GetSubNodes();
sub_zipper->SetParent(do_while_node);
sub_zipper->Init(loop_start, do_while_node);
zipper.InsertAfter(do_while_node, label);
sub_zipper->Remove(goto_node);
// ShowCurrentState("After DoWhile Enclose");
}
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) {
zipper.Remove(goto_node);
// ShowCurrentState("Ignore IfThen Enclose");
return;
}
ASTNode prev = goto_node->GetPrevious();
ASTNode parent = label->GetParent();
Expr condition = goto_node->GetGotoCondition();
Expr neg_condition = MakeExpr<ExprNot>(condition);
bool do_else = false;
if (prev->IsIfThen()) {
Expr if_condition = prev->GetIfCondition();
do_else = ExprAreEqual(if_condition, condition);
}
ASTNode parent = label->GetParent();
zipper.DetachSegment(goto_node, if_end);
ASTNode if_node = ASTBase::Make<ASTIfThen>(parent, condition, ASTZipper(goto_node));
zipper.InsertAfter(if_node, prev);
ASTNode if_node;
if (do_else) {
if_node = ASTBase::Make<ASTIfElse>(parent);
} else {
Expr neg_condition = MakeExprNot(condition);
if_node = ASTBase::Make<ASTIfThen>(parent, neg_condition);
}
ASTZipper* sub_zipper = if_node->GetSubNodes();
sub_zipper->SetParent(if_node);
sub_zipper->Init(goto_node, if_node);
zipper.InsertAfter(if_node, prev);
sub_zipper->Remove(goto_node);
// ShowCurrentState("After IfThen Enclose");
}
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();
ASTNode grandpa = parent->GetParent();
bool is_loop = parent->IsLoop();
bool is_if = parent->IsIfThen() || parent->IsIfElse();
bool is_else = parent->IsIfElse();
bool is_if = parent->IsIfThen();
ASTNode prev = goto_node->GetPrevious();
ASTNode post = goto_node->GetNext();
Expr condition = goto_node->GetGotoCondition();
u32 var_index = NewVariable();
Expr var_condition = MakeExpr<ExprVar>(var_index);
ASTNode var_node = ASTBase::Make<ASTVarSet>(parent, var_index, condition);
zipper.DetachSingle(goto_node);
zipper.InsertAfter(var_node, prev);
goto_node->SetGotoCondition(var_condition);
if (is_loop) {
u32 var_index = NewVariable();
Expr var_condition = MakeExpr<ExprVar>(var_index);
ASTNode var_node = ASTBase::Make<ASTVarSet>(parent, var_index, condition);
ASTNode var_node_init = ASTBase::Make<ASTVarSet>(parent, var_index, true_condition);
zipper2.InsertBefore(var_node_init, parent);
zipper.InsertAfter(var_node, prev);
goto_node->SetGotoCondition(var_condition);
ASTNode break_node = ASTBase::Make<ASTBreak>(parent, var_condition);
zipper.InsertAfter(break_node, var_node);
} else if (is_if) {
ASTNode post = var_node->GetNext();
} else if (is_if || is_else) {
if (post) {
u32 var_index = NewVariable();
Expr var_condition = MakeExpr<ExprVar>(var_index);
ASTNode var_node = ASTBase::Make<ASTVarSet>(parent, var_index, condition);
ASTNode var_node_init = ASTBase::Make<ASTVarSet>(parent, var_index, true_condition);
if (is_if) {
zipper2.InsertBefore(var_node_init, parent);
} else {
zipper2.InsertBefore(var_node_init, parent->GetPrevious());
}
zipper.InsertAfter(var_node, prev);
goto_node->SetGotoCondition(var_condition);
zipper.DetachTail(post);
ASTNode if_node = ASTBase::Make<ASTIfThen>(parent, var_condition, ASTZipper(post));
zipper.InsertAfter(if_node, var_node);
ASTNode if_node = ASTBase::Make<ASTIfThen>(parent, MakeExprNot(var_condition));
ASTZipper* sub_zipper = if_node->GetSubNodes();
sub_zipper->SetParent(if_node);
sub_zipper->Init(post, if_node);
zipper.InsertAfter(if_node, var_node);
} else {
Expr if_condition;
if (is_if) {
if_condition = parent->GetIfCondition();
} else {
ASTNode if_node = parent->GetPrevious();
if_condition = MakeExprNot(if_node->GetIfCondition());
}
Expr new_condition = MakeExprAnd(if_condition, condition);
goto_node->SetGotoCondition(new_condition);
}
} else {
UNREACHABLE();
}
ASTZipper& zipper2 = parent->GetManager();
ASTNode next = parent->GetNext();
if (is_if && next && next->IsIfElse()) {
zipper2.InsertAfter(goto_node, next);
goto_node->SetParent(grandpa);
// ShowCurrentState("After MoveOutward");
return;
}
zipper2.InsertAfter(goto_node, parent);
goto_node->SetParent(grandpa);
// ShowCurrentState("After MoveOutward");
}
} // namespace VideoCommon::Shader