bjoernager/rust
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Start node has no immediate dominator

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Change the immediate_dominator return type to Option, and use None to
indicate that node has no immediate dominator.

Also fix the issue where the start node would be returned as its own
immediate dominator.
This commit is contained in:
Tomasz Miąsko 2023-05-14 00:00:00 +00:00
parent 3603a84a3d
commit f16d2b1629
3 changed files with 23 additions and 15 deletions
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2
compiler/rustc_const_eval/src/transform/validate.rs
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@ -164,7 +164,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
if let Some(root) = post_contract_node.get(&bb) {
break *root;
}
let parent = doms.immediate_dominator(bb);
let parent = doms.immediate_dominator(bb).unwrap();
dom_path.push(bb);
if !self.body.basic_blocks[parent].is_cleanup {
break bb;