[PATCH] D114628: [AArch64][SVE] Duplicate FP_EXTEND/FP_TRUNC -> LOAD/STORE dag combines

[Paul Walker via Phabricator via llvm-commits]

paulwalker-arm added a comment.

I guess I'm not sure what you're asking here.  In the context of these floating point loads and stores there is no load/shuffle pattern, or at least not one that DAGCombine sees. Essentially before operation legalisation the DAG looks nice. The problem is introduced during operation legalisation and thus the first opportunity DAGCombine has to improve things is after everything has been converted to the predicated target specific nodes along with the (un)packs and subvector operations that marshal the data between fixed and scalable domains.  Spotting these sequences and optimising them proved messy.


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https://reviews.llvm.org/D114628