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shader: hand IR uses over at once on replacement and skip use lists at program teardown

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Senaxx authored and nmzik committed 2026-10-27 07:04:38 +01:00
1 parent 1ec69f8e7d
commit a526a8b9c9
4 files changed
+63 -23
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src/graphics/shader/recompiler/ir/Value.cpp
+25 -18
View File
@@ -186,12 +186,17 @@ size_t Inst::NumPhiBlocks() const {
return num_args == PhiArity ? phi_args.size() : 0;
}
Value Inst::Arg(size_t index) const {
EXIT_IF(index >= NumArgs());
if (num_args <= InlineArity) {
return fixed_args[index];
template <typename Self>
auto& Inst::ArgSlot(Self& self, size_t index) {
EXIT_IF(index >= self.NumArgs());
if (self.num_args <= InlineArity) {
return self.fixed_args[index];
}
return num_args == PhiArity ? phi_args[index].second : large_args[index];
return self.num_args == PhiArity ? self.phi_args[index].second : self.large_args[index];
}
Value Inst::Arg(size_t index) const {
return ArgSlot(*this, index);
}
Block* Inst::PhiBlock(size_t index) const {
@@ -212,17 +217,11 @@ void Inst::SetParent(Block* block) {
}
void Inst::SetArg(size_t index, Value value) {
const auto old = Arg(index);
if (auto* old_inst = old.TryInstruction(); old_inst != nullptr) {
auto& arg = ArgSlot(*this, index);
if (auto* old_inst = arg.TryInstruction(); old_inst != nullptr) {
RemoveUse(old_inst, index);
}
if (num_args <= InlineArity) {
fixed_args[index] = value;
} else if (num_args == PhiArity) {
phi_args[index].second = value;
} else {
large_args[index] = value;
}
arg = value;
if (auto* new_inst = value.TryInstruction(); new_inst != nullptr) {
AddUse(new_inst, index);
}
@@ -238,11 +237,15 @@ void Inst::AddPhiOperand(Block* predecessor, Value value) {
}
void Inst::ReplaceUsesWith(Value replacement, bool preserve) {
const auto old_uses = uses;
for (const auto& use: old_uses) {
use.user->SetArg(use.operand, replacement);
}
// Detach the arguments first (a phi can use itself), then move every use over in order.
Invalidate();
const auto old_uses = std::exchange(uses, {});
for (const auto& use: old_uses) {
ArgSlot(*use.user, use.operand) = replacement;
}
if (auto* target = replacement.TryInstruction(); target != nullptr) {
target->uses.insert(target->uses.end(), old_uses.begin(), old_uses.end());
}
if (preserve) {
opcode = ValueOpcode::Identity;
num_args = 1;
@@ -272,6 +275,10 @@ void Inst::ClearArgs() {
RemoveUse(value_inst, index);
}
}
DropArgs();
}
void Inst::DropArgs() {
if (num_args == PhiArity) {
std::destroy_at(&phi_args);
std::construct_at(&fixed_args);