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shader: Store type of phi nodes in flags
This is needed because pseudo-instructions where invalidated.
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@ -288,7 +288,8 @@ Id EmitPhi(EmitContext& ctx, IR::Inst* inst) {
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operands.push_back(PhiArgDef(ctx, inst, index));
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operands.push_back(inst->PhiBlock(index)->Definition<Id>());
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}
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const Id result_type{TypeId(ctx, inst->Arg(0).Type())};
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// The type of a phi instruction is stored in its flags
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const Id result_type{TypeId(ctx, inst->Flags<IR::Type>())};
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return ctx.OpPhi(result_type, std::span(operands.data(), operands.size()));
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}
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@ -193,6 +193,10 @@ void Inst::AddPhiOperand(Block* predecessor, const Value& value) {
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if (!value.IsImmediate()) {
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Use(value);
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}
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if (Flags<IR::Type>() == IR::Type::Void) {
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// Set the type of the phi node
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SetFlags<IR::Type>(value.Type());
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}
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phi_args.emplace_back(predecessor, value);
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}
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@ -56,7 +56,11 @@ bool Value::IsLabel() const noexcept {
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}
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IR::Type Value::Type() const noexcept {
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if (IsIdentity() || IsPhi()) {
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if (IsPhi()) {
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// The type of a phi node is stored in its flags
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return inst->Flags<IR::Type>();
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}
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if (IsIdentity()) {
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return inst->Arg(0).Type();
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}
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if (type == Type::Opaque) {
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