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Rewrite MemDecoder around pointers not a slice

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This commit is contained in:
Ben Kimock 2023-04-20 23:11:47 -04:00
parent 39c6804b92
commit 1f67ba61a9
11 changed files with 174 additions and 130 deletions
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16
compiler/rustc_query_system/src/dep_graph/serialized.rs
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@ -94,21 +94,19 @@ impl<'a, K: DepKind + Decodable<MemDecoder<'a>>> Decodable<MemDecoder<'a>>
{
#[instrument(level = "debug", skip(d))]
fn decode(d: &mut MemDecoder<'a>) -> SerializedDepGraph<K> {
let start_position = d.position();
// The last 16 bytes are the node count and edge count.
debug!("position: {:?}", d.position());
d.set_position(d.data.len() - 2 * IntEncodedWithFixedSize::ENCODED_SIZE);
let (node_count, edge_count) =
d.with_position(d.len() - 2 * IntEncodedWithFixedSize::ENCODED_SIZE, |d| {
debug!("position: {:?}", d.position());
let node_count = IntEncodedWithFixedSize::decode(d).0 as usize;
let edge_count = IntEncodedWithFixedSize::decode(d).0 as usize;
(node_count, edge_count)
});
debug!("position: {:?}", d.position());
let node_count = IntEncodedWithFixedSize::decode(d).0 as usize;
let edge_count = IntEncodedWithFixedSize::decode(d).0 as usize;
debug!(?node_count, ?edge_count);
debug!("position: {:?}", d.position());
d.set_position(start_position);
debug!("position: {:?}", d.position());
let mut nodes = IndexVec::with_capacity(node_count);
let mut fingerprints = IndexVec::with_capacity(node_count);
let mut edge_list_indices = IndexVec::with_capacity(node_count);