---
id: pr-tilelang-2039
repo: tile-ai/tilelang
pr: 2039
title: '[API] Default warp-lane mask to 0xFFFFFFFF for warp-sync builtins'
author: LeiWang1999
date: '2026-04-13'
url: https://github.com/tile-ai/tilelang/pull/2039
source_category: upstream-code
architectures:
- sm100
tags:
- benchmark kernel
techniques:
- warp-specialization
hardware_features: []
kernel_types: []
languages:
- cuda-cpp
captured_at: '2026-05-16'
status: merged
merge_sha: b3d5981b001336150e69f5ba8bfb468b0948ea51
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- docs/programming_guides/instructions.md
- testing/python/language/test_tilelang_language_warp_sync.py
- testing/python/language/test_tilelang_language_warp_vote.py
- tilelang/language/builtin.py
artifact_dir: evidence/pull-bundles/tilelang/gh-2039
head_ref_oid: d0a9f2f738179ec9e6e764bae24ccb44cc8d7209
---
# [API] Default warp-lane mask to 0xFFFFFFFF for warp-sync builtins

- Repository: `tile-ai/tilelang`
- PR: [2039](https://github.com/tile-ai/tilelang/pull/2039)
- Decision: `Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.`
- Reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.

## Changed Paths

- `docs/programming_guides/instructions.md`
- `testing/python/language/test_tilelang_language_warp_sync.py`
- `testing/python/language/test_tilelang_language_warp_vote.py`
- `tilelang/language/builtin.py`

## Evidence Bundle

`evidence/pull-bundles/tilelang/gh-2039`
