---
id: pr-cccl-cub-6265
repo: NVIDIA/cccl
pr: 6265
title: '[Backport 3.1] Fix invalid refactoring of  #4377 (#6246)'
author: miscco
date: '2025-10-16'
url: https://github.com/NVIDIA/cccl/pull/6265
source_category: upstream-code
architectures:
- sm90
tags:
- sm90
techniques: []
hardware_features:
- hopper
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 8d230592839d0f329e67cf213c0e61f2e5646c98
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- cub/cub/thread/thread_reduce.cuh
artifact_dir: evidence/pull-bundles/cccl-cub/gh-6265
head_ref_oid: 71ee0afa5ef54bac0acf9f920e8866d25197976c
---
# [Backport 3.1] Fix invalid refactoring of  #4377 (#6246)

- Repository: `NVIDIA/cccl`
- PR: [6265](https://github.com/NVIDIA/cccl/pull/6265)
- 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/thread/thread_reduce.cuh`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-6265`
