trans: Add early-out when translating unreachable controlflow expressions. #23066
+128
−2
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
This PR solves #21559 by making sure that unreachable if-expressions are not further translated.
Could someone who knows their way around
trans
take a look at the changes incontrolflow.rs
? I'm not sure if any other code relies on any side-effects of translating unreachable things.cc @nikomatsakis @nrc @eddyb