Simon Moll ea2cdbf5e6 [VP] Declaration and docs for vp.select intrinsic
llvm.vp.select extends the regular select instruction with an explicit
vector length (%evl).

All lanes with indexes at and above %evl are
undefined. Lanes below %evl are taken from the first input where the
mask is true and from the second input otherwise.

Reviewed By: rogfer01

Differential Revision: https://reviews.llvm.org/D105351
2021-09-02 11:17:14 +02:00
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