bjoernager/rust
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Add additional flooding when assigning a value and corresponding test

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This commit is contained in:
Jannis Christopher Köhl 2022-08-31 16:01:37 +02:00
parent bb1639769e
commit 292869493c
3 changed files with 66 additions and 1 deletions
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4
compiler/rustc_mir_dataflow/src/value_analysis.rs
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@ -339,7 +339,9 @@ impl<V: Clone + HasTop> State<V> {
pub fn assign_idx(&mut self, target: PlaceIndex, result: ValueOrPlace<V>, map: &Map) {
match result {
ValueOrPlace::Value(value) => {
// FIXME: What if not all tracked projections are overwritten? Can this happen?
// First flood the target place in case we also track any projections (although
// this scenario is currently not well-supported with the ValueOrPlace interface).
self.flood_idx(target, map, V::top());
if let Some(value_index) = map.places[target].value_index {
self.0[value_index] = value;
}