When loweringPrepare cg.var_arg for AArch64, we create multiple basic blocks, but didn't really get ordering of the blocks in the blocklist of the parent region right. That is, we didn't make sure the last of the block list is the naturally last block (exit) of the region. This PR fixes this problem.
If we don't fix this problem, FlattenCFGPass will fail verification because CIRScopeOpFlattening in this pass is onlyy expecting to see cir.yield op in the last block of the region's block list.
When loweringPrepare cg.var_arg for AArch64, we create multiple basic blocks, but didn't really get ordering of the blocks in the blocklist of the parent region right. That is, we didn't make sure the last of the block list is the naturally last block (exit) of the region. This PR fixes this problem.
If we don't fix this problem, FlattenCFGPass will fail verification because CIRScopeOpFlattening in this pass is onlyy expecting to see cir.yield op in the last block of the region's block list.