---
id: pr-cccl-cub-6246
repo: NVIDIA/cccl
pr: 6246
title: 'Fix invalid refactoring of  #4377'
author: miscco
date: '2025-10-15'
url: https://github.com/NVIDIA/cccl/pull/6246
source_category: upstream-code
architectures:
- sm90
tags:
- reduction
- sm90
techniques: []
hardware_features:
- hopper
kernel_types:
- reduction
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 474852d7823757de85aae0066724540911f8d29f
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-6246
head_ref_oid: c8858c0263880a3fbe957def1178fdf10f96243e
---
# Fix invalid refactoring of  #4377

- Repository: `NVIDIA/cccl`
- PR: [6246](https://github.com/NVIDIA/cccl/pull/6246)
- 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-6246`
