Fix classical bit mapping in HLS pass (backport #14597) #14625
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* Map classical bits from block to outer circuit Co-authored-by: Alexander Ivrii <alexi@il.ibm.com> * Add regression test * Add reno * Avoid allocating cargs Previously the cargs were being written to a Vec<usize> as an intermediate storage, however we are just returning them directly and don't need to allocate or change the types. This commit just works with the slice returned from the interner directly which both simplifies the code and should also be faster. --------- Co-authored-by: Alexander Ivrii <alexi@il.ibm.com> Co-authored-by: Matthew Treinish <mtreinish@kortar.org> (cherry picked from commit 9ec464a)
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mtreinish
approved these changes
Jun 16, 2025
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Summary
This PR fixes a bug in HLS where classical registers were mapped to the indices in within the high level object they were defined on, instead of the corresponding index in the global circuit.
Fixes #14569 .
Details and comments
The bug was introduced in 2.0, so the fix should be backported to the
stable/2.0branch, but notstable/1.4.This is an automatic backport of pull request #14597 done by [Mergify](https://mergify.com).