---
id: pr-quack-32
repo: Dao-AILab/quack
pr: 32
title: Fix a potential use-def issue in dynamic control flow
author: anakinxc
date: '2025-09-01'
url: https://github.com/Dao-AILab/quack/pull/32
source_category: upstream-code
architectures:
- sm90
tags:
- gemm
- sm90
techniques: []
hardware_features:
- hopper
kernel_types:
- gemm
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 6895709f5ef4b67d4632474c9fb5b71c0e8f64b4
inclusion_reason: Search-matched CUDA kernel optimization PR; materialize diff/source before synthesis.
changed_paths:
- quack/symmetric_dense_gemm_sm90.py
artifact_dir: evidence/pull-bundles/quack/gh-32
head_ref_oid: 6116832356022f1209c5b4cbd5c4645d22467ca6
---
# Fix a potential use-def issue in dynamic control flow

- Repository: `Dao-AILab/quack`
- PR: [32](https://github.com/Dao-AILab/quack/pull/32)
- 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

- `quack/symmetric_dense_gemm_sm90.py`

## Evidence Bundle

`evidence/pull-bundles/quack/gh-32`
