void BufferAccessor::Iterate(CodeGen &codegen, llvm::Value *buffer_ptr,
BufferAccessor::IterateCallback &callback) const {
auto *start = codegen.Load(BufferProxy::buffer_start, buffer_ptr);
auto *end = codegen.Load(BufferProxy::buffer_pos, buffer_ptr);
lang::Loop loop{codegen, codegen->CreateICmpNE(start, end), {{"pos", start}}};
{
auto *pos = loop.GetLoopVar(0);
// Read
std::vector<codegen::Value> vals;
UpdateableStorage::NullBitmap null_bitmap(codegen, storage_format_, pos);
for (uint32_t col_id = 0; col_id < storage_format_.GetNumElements();
col_id++) {
auto val = storage_format_.GetValue(codegen, pos, col_id, null_bitmap);
vals.emplace_back(val);
}
// Invoke callback
callback.ProcessEntry(codegen, vals);
// Move along
auto *next = codegen->CreateConstInBoundsGEP1_64(
pos, storage_format_.GetStorageSize());
loop.LoopEnd(codegen->CreateICmpNE(next, end), {next});
}
}
