[HandshakeOptimizeBitwidths] Fix mux cycle extension#838
Merged
Conversation
Prior to this PR the cycle bitwidth reduction pattern correctly calculated the optimal bitwidth using backtracking on forwarded branch operands, but failed to do so when determining the extension type. The extension type was instead calculated using the data operands which was incorrect. This resulted in the wrong extension type being calculated at times. This PR fixes that by calculating the extension type and optimal bitwidth of a cyclic mux at the same time. Fixes #827
Jiahui17
approved these changes
Apr 10, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
Prior to this PR the cycle bitwidth reduction pattern correctly calculated the optimal bitwidth using backtracking on forwarded branch operands, but failed to do so when determining the extension type. The extension type was instead calculated using the data operands which was incorrect. This resulted in the wrong extension type being calculated at times.
This PR fixes that by calculating the extension type and optimal bitwidth of a cyclic mux at the same time.
Fixes #827
Required to land #816