Philip Reames faa43a80f7 [RISCV] Rewrite isLegalElementTypeForRVV in terms of ValueTypes [nfc] ...

This was briefly mentioned as a possibility in review discussion on D149369.

One slightly surprising bit to call out - these interfaces can get invoked with non-vector typed arguments. LoopVectorizer likes to call the costing interfaces with scalar types when unrolling, but not vectorizing. I found that surprising, not sure if others do.

Differential Revision: https://reviews.llvm.org/D149462

2023-05-01 07:37:40 -07:00

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