Function GetVariableInfo

layers/stateless/sl_spirv.cpp:42–62

easier to use recursion to traverse the OpTypeStruct

// easier to use recursion to traverse the OpTypeStruct
static void GetVariableInfo(const spirv::Module& module_state, const spirv::Instruction* insn, VariableInstInfo& info) {
    if (!insn) {
        return;
    } else if (insn->Opcode() == spv::OpTypePointer || insn->Opcode() == spv::OpTypeUntypedPointerKHR) {
        return;
    } else if (insn->Opcode() == spv::OpTypeFloat || insn->Opcode() == spv::OpTypeInt) {
        const uint32_t bit_width = insn->Word(2);
        info.has_8bit |= (bit_width == 8);
        info.has_16bit |= (bit_width == 16);
    } else if (insn->Opcode() == spv::OpTypeStruct) {
        for (uint32_t i = 2; i < insn->Length(); i++) {
            const spirv::Instruction* member_insn = module_state.FindDef(insn->Word(i));
            if (member_insn->StorageClass() == spv::StorageClassPhysicalStorageBuffer) {
                continue;  // a uint8 pointer is not a 8-bit element
            }
            const uint32_t base_insn_id = module_state.GetBaseType(member_insn);
            const spirv::Instruction* base_insn = module_state.FindDef(base_insn_id);
            GetVariableInfo(module_state, base_insn, info);
        }
    }
}

static bool IsTileAttachmentImagePointer(const spirv::Module& module_state, uint32_t image_id) {
    const auto* insn = module_state.FindDef(image_id);