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Cranelift: remove de-morgan mid-end rules (speedup up to 39.64%) #12127

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Merged
cfallin merged 1 commit into from
Dec 5, 2025
Merged

Cranelift: remove de-morgan mid-end rules (speedup up to 39.64%) #12127

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8 changes: 0 additions & 8 deletions cranelift/codegen/src/opts/bitops.isle
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Original file line number Diff line number Diff line change
Expand Up @@ -41,14 +41,6 @@
;; not(not(x)) == x.
(rule (simplify (bnot ty (bnot ty x))) (subsume x))

;; DeMorgan's rule (two versions):
;; bnot(bor(x, y)) == band(bnot(x), bnot(y))
(rule (simplify (bnot ty (bor ty x y)))
(band ty (bnot ty x) (bnot ty y)))
;; bnot(band(x, y)) == bor(bnot(x), bnot(y))
(rule (simplify (bnot ty (band t x y)))
(bor ty (bnot ty x) (bnot ty y)))

;; `or(and(x, y), not(y)) == or(x, not(y))`
(rule (simplify (bor ty
(band ty x y)
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