Simon Pilgrim 77fc551d1a [TargetLowering] Add ISD::ROTL/ROTR vector expansion ...

Move existing rotation expansion code into TargetLowering and set it up for vectors as well.

Ideally this would share more of the funnel shift expansion, but we handle the shift amount modulo quite differently at the moment.

Begun removing x86 vector rotate custom lowering to use the expansion.

llvm-svn: 349025

2018-12-13 11:20:48 +00:00

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