transformations: add exp-to-chebyshev lowering pass#5820
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Add a new pass that expands math.exp using Chebyshev polynomial approximation with Clenshaw evaluation, as an alternative to the existing Taylor series approach. Inspired by Google HEIR's polynomial approximation for FHE. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
…_degree attribute The Chebyshev pass now only fires on math.exp ops that have a chebyshev_degree attribute, allowing it to coexist with the Taylor pass in the same pipeline. Also reads lower/upper bounds from op attributes. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Depends on the PR: #5798