---
id: pr-tilelang-1722
repo: tile-ai/tilelang
pr: 1722
title: '[Refactor] re-implement vector subtype and its access method'
author: LeiWang1999
date: '2026-01-23'
url: https://github.com/tile-ai/tilelang/pull/1722
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
techniques:
- vectorized-loads
hardware_features:
- fp4
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 4ab369d6ad6ad31a91d0ae8e7302f369a39ca632
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- src/target/codegen_cuda.cc
- src/tl_templates/cuda/cuda_fp4.h
- testing/python/language/test_tilelang_language_copy.py
artifact_dir: evidence/pull-bundles/tilelang/gh-1722
head_ref_oid: 6dbb4dc60d4d0995ced8d786829c5fd089f37ce0
---
# [Refactor] re-implement vector subtype and its access method

- Repository: `tile-ai/tilelang`
- PR: [1722](https://github.com/tile-ai/tilelang/pull/1722)
- 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

- `src/target/codegen_cuda.cc`
- `src/tl_templates/cuda/cuda_fp4.h`
- `testing/python/language/test_tilelang_language_copy.py`

## Evidence Bundle

`evidence/pull-bundles/tilelang/gh-1722`
