---
id: pr-cccl-cub-8210
repo: NVIDIA/cccl
pr: 8210
title: Add warp shuffle constraints
author: davebayer
date: '2026-03-30'
url: https://github.com/NVIDIA/cccl/pull/8210
source_category: upstream-code
architectures:
- sm100
tags:
- warp
techniques:
- warp-specialization
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 28fc0346afbaa6db588cad2febc13537151ae35e
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- libcudacxx/include/cuda/__warp/warp_shuffle.h
artifact_dir: evidence/pull-bundles/cccl-cub/gh-8210
head_ref_oid: 7f39fd459588b2dcb718256d4878109626cd7dee
---
# Add warp shuffle constraints

- Repository: `NVIDIA/cccl`
- PR: [8210](https://github.com/NVIDIA/cccl/pull/8210)
- 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

- `libcudacxx/include/cuda/__warp/warp_shuffle.h`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-8210`
