rishi/scryer-prolog
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

correct LIS backward bug in cycle_detection.rs

Browse Source
This commit is contained in:
Mark
2023-10-23 13:28:44 -06:00
parent 97b899f4a3
commit d588b18c39
1 changed files with 8 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
src/machine/cycle_detection.rs
View File

@@ -105,18 +105,16 @@ impl<'a, const STOP_AT_CYCLES: bool> CycleDetectingIter<'a, STOP_AT_CYCLES> {
let next = self.next as usize;
if self.heap[next].get_forwarding_bit() {
if self.current != next {
return if self.cycle_detection_active() {
return if self.current != next {
if self.cycle_detection_active() {
self.cycle_found = true;
None
} else {
Some(self.backward_and_return())
};
} else if self.backward() {
return None;
}
continue;
} else {
Some(self.backward_and_return())
};
} else if self.heap[next].get_mark_bit() == self.mark_phase {
return Some(self.backward_and_return());
}
@@ -130,11 +128,9 @@ impl<'a, const STOP_AT_CYCLES: bool> CycleDetectingIter<'a, STOP_AT_CYCLES> {
self.next = temp;
if self.next < self.heap.len() as u64 {
if self.heap[self.next as usize].get_mark_bit() == self.mark_phase {
return Some(HeapCellValue::build_with(tag, next as u64));
}
}
}
HeapCellValueTag::Str => {
let h = self.next as usize;
let cell = self.heap[h];
@@ -350,8 +346,8 @@ impl<'a, const STOP_AT_CYCLES: bool> CycleDetectingIter<'a, STOP_AT_CYCLES> {
self.heap[self.current].set_mark_bit(self.mark_phase);
if self.heap[self.current - 1].get_forwarding_bit() {
self.next = self.current as u64 - 1;
self.heap[self.current].set_value(self.next);
self.next = self.current as u64 - 1;
self.current = temp as usize;
true