v2026.09.01

What's Changed

• Update Bazel rules and macros to support externalized constants. by @copybara-service[bot] in #3266
• Fixes two bugs with linalg canonicalizations by @copybara-service[bot] in #3272
• Fixes a bug with secret patterns by @copybara-service[bot] in #3273
• add level analysis validation helper by @copybara-service[bot] in #3271
• Fix attribute dropping in mgmt canonicalization patterns. by @copybara-service[bot] in #3280
• insert level validations through the arithmetic pipeline by @copybara-service[bot] in #3279
• Add a target-specific tablgen config by @copybara-service[bot] in #2607
• Avoid casting booleans by @mdgrs in #3293
• Use ISL equality check by @mdgrs in #3256
• add lola e2e test by @AlexanderViand in #3225
• make insert-mgmt-pipeline use backend config by @copybara-service[bot] in #3290
• use backend config for bootstrap level usage in bootstrap-waterline analysis by @copybara-service[bot] in #3296
• Add kernel for broadcasted reduce by @copybara-service[bot] in #3270
• support integer splats in polynomial-approximation (fpowi) by @copybara-service[bot] in #3297
• Faster enumeration for helrm model by @copybara-service[bot] in #3301
• Define kernel dialect and kernel.eval_chebyshev op by @copybara-service[bot] in #3282
• Add has_kernel_chebyshev field to compilation targets by @copybara-service[bot] in #3284
• Switch to using CAS-only public API key by @copybara-service[bot] in #3308
• Add math dialect support to OpenFHE emitter by @copybara-service[bot] in #3300
• Implement target-speicfic level analysis for kernel.eval_chebyshev by @copybara-service[bot] in #3289
• Define openfhe.eval_chebyshev_series op and C++ emitter by @copybara-service[bot] in #3283
• Update lower-polynomial-eval to lower to kernel.eval_chebyshev if the backend supports it by @copybara-service[bot] in #3288
• Implement secret-to-ckks conversion for kernel.eval_chebyshev by @copybara-service[bot] in #3287
• Lower kernel.eval_chebyshev to lattigo and openfhe ops by @copybara-service[bot] in #3285
• Improve single element tensor handling by @mdgrs in #3302
• cheddar: switch to DPS by @AlexanderViand in #3306
• Support tensor.pad in the layout pipeline by @copybara-service[bot] in #3221
• Enable native Chebyshev kernels in Lattigo and OpenFHE backend targets by @copybara-service[bot] in #3286
• remove openfhe interpreter by @copybara-service[bot] in #3294
• add validate-scale pass by @copybara-service[bot] in #3310
• rework scale analysis and dataflow depending on secretness by @copybara-service[bot] in #3311
• lattigo: do not use logSlots to indicate fewer used slots by @mdgrs in #3318
• Add composite relu by @mdgrs in #3316
• improve handling of padding for conv1d by @mdgrs in #3303
• ensure bootstrap occurs before a mul+relin+rescale, not in the middle by @copybara-service[bot] in #3319
• add kernel.linear_transform by @copybara-service[bot] in #3314
• preserve linalg.matvec as kernel.linear_transform in ConvertToCiphertextSemantics by @copybara-service[bot] in #3313
• feat: add pt-ct matmul support for bicyclic encoding by @copybara-service[bot] in #3209
• layout: don't insert layout rectification for func ops and generics by @copybara-service[bot] in #3320
• polynomial approx: implement square and multiply for math.fpowi by @copybara-service[bot] in #3321
• small codegen improvements by @mdgrs in #3317
• Poulpy Emitter by @martonmoro in #3250
• add mgmt.bootstrap to validate-scale by @copybara-service[bot] in #3325
• Support level reduction interface for multiple secret operands by @copybara-service[bot] in #3324
• Implement early bootstrap placement in HEIR by @copybara-service[bot] in #3326
• Fix affine-related bugs in split-preprocessing by @AlexanderViand in #3327
• lwe: add (optional) level and scale attributes to lwe.rlwe_encode by @AlexanderViand in #3305
• improve HEIR readme for quickstart by @copybara-service[bot] in #3330
• fix: implement physical slot replication for bicyclic and tricyclic layout after by @copybara-service[bot] in #3247
• feat: optimize matmul periodic replication by using maximal valid prefix. by @copybara-service[bot] in #3252
• Encode plaintext at highest used level instead of max level by @mdgrs in #3332
• Fix padding for conv2d by @mdgrs in #3323
• build: remove no-yosys flag by @AlexanderViand in #3342
• lattigo: fix galois key generation for negative rotations by @AlexanderViand in #3341
• Fix deprecation warnings for tmpnam and rewriter.create by @toprakmurat in #3376
• [JaxiteWord] Update lowering and emission for CROSS polynomial APIs by @Zohaib58 in #3251
• cheddar: add optional scale-snu CHEDDAR dependency by @AlexanderViand in #3334
• blog post for 2026-08-13 HEIR meeting by @copybara-service[bot] in #3387
• tfhe-rust-hl: handle affine loop iter_args by @AlexanderViand in #3347

Full Changelog: v2026.08.01...v2026.09.01