Sander de Smalen f571fe6df5 Reland [LoopVectorizer] NFCI: Calculate register usage based on TLI.getTypeLegalizationCost. ...

This relands https://reviews.llvm.org/D91059 and reverts commit
30fded75b4.

GetRegUsage now returns 0 when Ty is not a valid vector element type.

2020-11-17 13:45:10 +00:00

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