HOTFIX: avoid bitRangeInt function for branching (#switchInt)#732
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Stevengre merged 1 commit intoOct 10, 2025
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The `bitRangeInt` equation in `domains.md` uses partial bit-shift
symbols and is therefore not applied by booster. A better alternative
is to use the `truncate` function locally defined in
`mir-semantics`. Expressions are equivalent:
```
bitRangeInt(VAL, 0, WIDTH)
(def) == (VAL >>Int 0) modInt (1 <<Int WIDTH)
(>> 0) == VAL modInt (1 <<Int WIDTH)
(mod via mask) == VAL &Int ((1<<Int WIDTH) -Int 1) == truncate(VAL, WIDTH, Unsigned)
```
Also marking some relevant simplifications as smt-lemmas.
Altogether, this avoids a number of observed fall-backs in p-token execution.
Stevengre
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Mar 17, 2026
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The
bitRangeIntequation indomains.mduses partial bit-shift symbols and is therefore not applied by booster. A better alternative is to use thetruncatefunction locally defined inmir-semantics. Expressions are equivalent:Also marking some relevant simplifications as smt-lemmas.
Altogether, this avoids a number of observed fall-backs in p-token execution.