[mpmd] Prefer producer fragment when merging inferred fragments to avoid false dependencies. - #1393
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[mpmd] Prefer producer fragment when merging inferred fragments to avoid false dependencies.#1393copybara-service[bot] wants to merge 1 commit into
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…oid false dependencies. Add FindLatestProducerFragmentOnMesh and use it as the preferred merge target in TryMergeWithExistingFragment. When an inferred fragment's operand is produced by a same-mesh FragmentOp, merging into that producer avoids introducing false dependencies on bystander fragments. Falls back to FindLastFragmentOnMesh (nearest preceding) when no producer fragment exists. PiperOrigin-RevId: 926295904
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[mpmd] Prefer producer fragment when merging inferred fragments to avoid false dependencies.
Add FindLatestProducerFragmentOnMesh and use it as the preferred merge target in TryMergeWithExistingFragment. When an inferred fragment's operand is produced by a same-mesh FragmentOp, merging into that producer avoids introducing false dependencies on bystander fragments. Falls back to FindLastFragmentOnMesh (nearest preceding) when no producer fragment exists.