[None][fix] Enabled simultaneous support for low-precision combine and MTP.

[yilin-void]

Summary by CodeRabbit

• Bug Fixes
  • Enhanced low-precision combine support detection to optimize performance across different precision formats and configurations.

Description

Test Coverage

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[yilin-void]

/bot run

[coderabbitai[bot]]

📝 Walkthrough

Walkthrough

A new method is_low_precision_combine_supported() was added to WideEPMoE to encapsulate low-precision combining support logic. A direct property check in the forward path was replaced with this method to conditionally determine if low-precision combining should be used based on quantization configuration.

Changes

Cohort / File(s)	Summary
Low-precision combining support abstraction tensorrt_llm/_torch/modules/fused_moe/fused_moe_wide_ep.py	Added new is_low_precision_combine_supported() method that returns False when disabled, or evaluates quantization flags (fp8_qdq, nvfp4, w4afp8) for DeepEPLowLatency. Replaced direct property check with method call in DeepEPLowLatency forward path.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

• Single file modification with straightforward logic
• New method encapsulates configuration checks with clear intent
• One call site replacement from property access to method invocation
• No complex interactions or algorithm changes

Pre-merge checks and finishing touches

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The PR description is completely empty - it contains only the template boilerplate with unfilled sections for Description, Test Coverage, and PR Checklist items.	Fill in the Description section explaining what was changed and why, the Test Coverage section listing relevant tests, and complete the PR Checklist to document compliance with project guidelines.
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	You can run @coderabbitai generate docstrings to improve docstring coverage.

✅ Passed checks (1 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: enabling simultaneous support for low-precision combine and MTP in the WideEPMoE module.

✨ Finishing touches

• [ ] 📝 Generate docstrings

🧪 Generate unit tests (beta)

• [ ] Create PR with unit tests
• [ ] Post copyable unit tests in a comment

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