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Summary: When splitting a load of a scalable type, the new address is calculated in SplitVecRes_LOAD using a vscale and an add instruction. This patch also adds a DAG combiner fold to visitADD for vscale: - Fold (add (vscale(C0)), (vscale(C1))) to (add (vscale(C0 + C1))) Reviewers: sdesmalen, efriedma, david-arm Reviewed By: david-arm Subscribers: tschuett, hiraditya, rkruppe, psnobl, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D82792
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