Stanislav Mekhanoshin 184b383457 Add v16f64 value type ...

We need to use it to handle <16 x double> indirect indexes
in the AMDGPU BE.

The only visible change from adding it is in ARM cost model.
To me it looks reasonable. With doubling a vector size it
quadruples the cost up to the size 8 and then it did only
double it. Now it also quadruples, which seems a logical
progression to me.

Actual AMDGPU code is to follow, this is a common part, plus
load/store legalization in the AMDGPU BE not to break what
works now.

Differential Revision: https://reviews.llvm.org/D79952

2020-05-14 14:28:00 -07:00

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