[llvm] AMDGPU: Mark SCC def dead in kill/demote lowering (PR #227024)

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llvmorg-github-actions[bot] wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-amdgpu

Author: Matt Arsenault (arsenm)

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<summary>Changes</summary>

Co-Authored-By: Claude Opus 5 <noreply@<!-- -->anthropic.com>

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Full diff: https://github.com/llvm/llvm-project/pull/227024.diff


2 Files Affected:

- (modified) llvm/lib/Target/AMDGPU/SIWholeQuadMode.cpp (+12-6) 
- (modified) llvm/test/CodeGen/AMDGPU/wqm.mir (+1-1) 


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https://github.com/llvm/llvm-project/pull/227024