---
id: pr-cccl-cub-6484
repo: NVIDIA/cccl
pr: 6484
title: Avoid potentially ambiguous overload in `warp_excahnge_shfl`
author: miscco
date: '2025-11-05'
url: https://github.com/NVIDIA/cccl/pull/6484
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: fcdfb69ba1bc05be6e81fd7f8367eb62cc689d89
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- cub/cub/warp/specializations/warp_exchange_shfl.cuh
artifact_dir: evidence/pull-bundles/cccl-cub/gh-6484
head_ref_oid: 382fed1a1f5049ef705a9c144f50ff8a365ffb33
---
# Avoid potentially ambiguous overload in `warp_excahnge_shfl`

- Repository: `NVIDIA/cccl`
- PR: [6484](https://github.com/NVIDIA/cccl/pull/6484)
- 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

- `cub/cub/warp/specializations/warp_exchange_shfl.cuh`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-6484`
