[llvm] [X86] combineAdd - remove unnecessary add(a,concat(vpmaddwd(x,y),vpmaddwd(z,w))) -> vpdpwssd(a,concat(x,z),concat(y,w)) fold (PR #209838)

Phoebe Wang via llvm-commits llvm-commits at lists.llvm.org
Thu Jul 16 06:15:10 PDT 2026

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https://github.com/phoebewang approved this pull request.

LGTM.

https://github.com/llvm/llvm-project/pull/209838

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