spirv: Add support for self-referencing phi nodes
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@ -217,9 +217,16 @@ Id EmitPhi(EmitContext& ctx, IR::Inst* inst) {
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IR::Inst* const arg_inst{arg.Inst()};
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def = arg_inst->Definition<Id>();
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if (!Sirit::ValidId(def)) {
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// If it hasn't been defined, get a forward declaration
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def = ctx.ForwardDeclarationId();
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arg_inst->SetDefinition<Id>(def);
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if (arg_inst == inst) {
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// This is a self referencing phi node
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def = ctx.CurrentId();
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// Self-referencing definition will be set by the caller
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} else {
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// If it hasn't been defined and it's not a self reference,
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// get a forward declaration
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def = ctx.ForwardDeclarationId();
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arg_inst->SetDefinition<Id>(def);
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}
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}
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}
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IR::Block* const phi_block{inst->PhiBlock(index)};
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