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[bugfix] Fix compilation failure when compiling csrc/trtllm_moe_allreduce_fusion.cu#1410

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yzh119 merged 1 commit intoflashinfer-ai:mainfrom
nvpohanh:dev/nvpohanh/fix-moe-allreduce-compile-failure
Aug 7, 2025
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[bugfix] Fix compilation failure when compiling csrc/trtllm_moe_allreduce_fusion.cu#1410
yzh119 merged 1 commit intoflashinfer-ai:mainfrom
nvpohanh:dev/nvpohanh/fix-moe-allreduce-compile-failure

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@nvpohanh nvpohanh commented Aug 7, 2025

[bugfix] Fix compilation failure when compiling csrc/trtllm_moe_allreduce_fusion.cu

This file includes FP4QuantizationSFLayout from
flashinfer/comm/trtllm_moe_allreduce_fusion.cuh which still uses the old format.

📌 Description

🔍 Related Issues

🚀 Pull Request Checklist

Thank you for contributing to FlashInfer! Before we review your pull request, please make sure the following items are complete.

✅ Pre-commit Checks

  • I have installed pre-commit by running pip install pre-commit (or used your preferred method).
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🧪 Tests

  • Tests have been added or updated as needed.
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Reviewer Notes

…duce_fusion.cu

This file includes FP4QuantizationSFLayout from
`flashinfer/comm/trtllm_moe_allreduce_fusion.cuh` which still uses the
old format.

Signed-off-by: Po-Han Huang <pohanh@nvidia.com>
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Summary of Changes

Hello @nvpohanh, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

I've addressed a compilation failure in csrc/trtllm_moe_allreduce_fusion.cu. The issue stemmed from an outdated reference to an FP4QuantizationSFLayout enum member. This pull request updates the enum usage to its correct, current form, ensuring the file compiles successfully.

Highlights

  • Compilation Fix: Corrected the usage of FP4QuantizationSFLayout in csrc/trtllm_moe_allreduce_fusion.cu by changing the default value from SWIZZLED_128x4 to SWIZZLED. This change directly addresses a compilation failure by aligning the code with the current definition of the enum.
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nvpohanh commented Aug 7, 2025

We should choose either this one or #1403 but not both.

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Code Review

This pull request correctly fixes a compilation error in csrc/trtllm_moe_allreduce_fusion.cu. The error was caused by an outdated enum member name, FP4QuantizationSFLayout::SWIZZLED_128x4, which has been updated to FP4QuantizationSFLayout::SWIZZLED to match the current definition in flashinfer/comm/trtllm_moe_allreduce_fusion.cuh. The change is accurate and necessary. The code is clean, and I have no further comments.

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LGTM

@yzh119 yzh119 merged commit e6c0fc8 into flashinfer-ai:main Aug 7, 2025
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nvpohanh added a commit to nvpohanh/vllm that referenced this pull request Aug 11, 2025
This includes the fix needed for FlashInfer AOT compilation failures.
See: flashinfer-ai/flashinfer#1403 and
flashinfer-ai/flashinfer#1410

Signed-off-by: Po-Han Huang <pohanh@nvidia.com>
yzh119 added a commit that referenced this pull request Aug 21, 2025
<!-- .github/pull_request_template.md -->

## 📌 Description

Currently comm modules and moe modules are not compiled in aot
unittests, which results in lots of issues such as #1371 #1410, and
#1530.
This PR adds these modules to aot UT to make sure we capture the
potential compilation error of these modules.

#1531 (a bugfix) changes were ported into this PR to test together.

## 🔍 Related Issues

#1371, #1410, #1530, #1531

## 🚀 Pull Request Checklist

Thank you for contributing to FlashInfer! Before we review your pull
request, please make sure the following items are complete.

### ✅ Pre-commit Checks

- [x] I have installed `pre-commit` by running `pip install pre-commit`
(or used your preferred method).
- [x] I have installed the hooks with `pre-commit install`.
- [x] I have run the hooks manually with `pre-commit run --all-files`
and fixed any reported issues.

> If you are unsure about how to set up `pre-commit`, see [the
pre-commit documentation](https://pre-commit.com/).

## 🧪 Tests

- [x] Tests have been added or updated as needed.
- [ ] All tests are passing (`unittest`, etc.).

## Reviewer Notes

cc @nvpohanh @weireweire

---------

Co-authored-by: Yaxing Cai <yaxingc@nvidia.com>
Co-authored-by: Zihao <zihaoy@nvidia.com>
Co-authored-by: Zihao Ye <expye@outlook.com>
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