---
id: pr-cccl-cub-7575
repo: NVIDIA/cccl
pr: 7575
title: Support more types in decoupled lookback fastpath
author: bernhardmgruber
date: '2026-02-25'
url: https://github.com/NVIDIA/cccl/pull/7575
source_category: upstream-code
architectures:
- sm90
tags:
- sm90
techniques: []
hardware_features:
- hopper
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: b9a0994c1cb8c38522309e3aabe01c7d0992489d
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- cub/cub/agent/single_pass_scan_operators.cuh
- cub/cub/util_arch.cuh
- cub/test/catch2_test_device_scan_invalid.cu
artifact_dir: evidence/pull-bundles/cccl-cub/gh-7575
head_ref_oid: 2b8c477678ab1ce300d68839b27c6a2840a76886
---
# Support more types in decoupled lookback fastpath

- Repository: `NVIDIA/cccl`
- PR: [7575](https://github.com/NVIDIA/cccl/pull/7575)
- 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/agent/single_pass_scan_operators.cuh`
- `cub/cub/util_arch.cuh`
- `cub/test/catch2_test_device_scan_invalid.cu`

## Evidence Bundle

`evidence/pull-bundles/cccl-cub/gh-7575`
