Sander de Smalen b1ff20fd35 [LV] Enable scalable vectorization by default for SVE cores. ...

The availability of SVE should be sufficient to enable scalable
auto-vectorization.

This patch adds a new TTI interface to query the target what style of
vectorization it wants when scalable vectors are available. For other
targets than AArch64, this currently defaults to 'FixedWidthOnly'.

Differential Revision: https://reviews.llvm.org/D115651

2021-12-20 16:23:29 +00:00

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