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shader: SSA and dominance

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This commit is contained in:
ReinUsesLisp 2021-02-02 21:07:00 -03:00 • committed by ameerj
parent 2d48a7b4d0
commit 6c4cc0cd06
24 changed files with 569 additions and 76 deletions
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22
src/shader_recompiler/frontend/ir/microinstruction.cpp
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@ -30,6 +30,11 @@ static void RemovePseudoInstruction(IR::Inst*& inst, IR::Opcode expected_opcode)
bool Inst::MayHaveSideEffects() const noexcept {
switch (op) {
case Opcode::Branch:
case Opcode::BranchConditional:
case Opcode::Exit:
case Opcode::Return:
case Opcode::Unreachable:
case Opcode::SetAttribute:
case Opcode::SetAttributeIndexed:
case Opcode::WriteGlobalU8:
@ -113,6 +118,17 @@ void Inst::SetArg(size_t index, Value value) {
args[index] = value;
}
std::span<const std::pair<Block*, Value>> Inst::PhiOperands() const noexcept {
return phi_operands;
}
void Inst::AddPhiOperand(Block* predecessor, const Value& value) {
if (!value.IsImmediate()) {
Use(value);
}
phi_operands.emplace_back(predecessor, value);
}
void Inst::Invalidate() {
ClearArgs();
op = Opcode::Void;
@ -125,6 +141,12 @@ void Inst::ClearArgs() {
}
value = {};
}
for (auto& [phi_block, phi_op] : phi_operands) {
if (!phi_op.IsImmediate()) {
UndoUse(phi_op);
}
}
phi_operands.clear();
}
void Inst::ReplaceUsesWith(Value replacement) {