jasonmolenda wrote:
Sorry for missing this one earlier. I'm a little confused about earlier in
this method,
```
for (uint32_t i = 0; i < k_num_sme_register; ++i, ++sme_regnum) {
m_sme_regnum_collection.push_back(sme_regnum);
m_dynamic_reg_infos.push_back(g_register_infos_sme[i]);
m_dynamic_reg_infos[sme_regnum].byte_offset =
m_dynamic_reg_infos[sme_regnum - 1].byte_offset +
m_dynamic_reg_infos[sme_regnum - 1].byte_size;
m_dynamic_reg_infos[sme_regnum].kinds[lldb::eRegisterKindLLDB] = sme_regnum;
}
lldb_private::RegisterSet sme_regset = g_reg_set_sme_arm64;
if (has_zt) {
m_sme_regnum_collection.push_back(sme_regnum);
m_dynamic_reg_infos.push_back(g_register_infos_sme2[0]);
m_dynamic_reg_infos[sme_regnum].byte_offset =
m_dynamic_reg_infos[sme_regnum - 1].byte_offset +
m_dynamic_reg_infos[sme_regnum - 1].byte_size;
m_dynamic_reg_infos[sme_regnum].kinds[lldb::eRegisterKindLLDB] = sme_regnum;
sme_regset.num_registers += 1;
}
```
At the end of the loops, `sme_regnum` is the index of the final SME register
we've added to `m_dynamic_reg_infos`. Then if we have the ZT0 register, we
reuse that index a second time when adding ZT0 don't we. I don't know if it
has anything to do with the issue at hand, but it seems like `sme_regnum` needs
to be incremented if `has_zt` and we're adding one more to the vector.
https://github.com/llvm/llvm-project/pull/140875
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