tree d5b510c2baf345fc4fe208769b650685e2ac3b0e
parent f41525ff432fb3f49b1dc9a6d39b32c3dc005c27
author jacquesguan <Jianjian.Guan@streamcomputing.com> 1658137057 +0800
committer Copybara-Service <copybara-worker@google.com> 1659598606 -0700

[RISCV] Add cost modelling for vector widenning reduction.

In RVV, we use vwredsum.vs and vwredsumu.vs for vecreduce.add(ext(Ty A)) if the result type's width is twice of the input vector's SEW-width. In this situation, the cost of extended add reduction should be same as single-width add reduction. So as the vector float widenning reduction.

Differential Revision: https://reviews.llvm.org/D129994

GitOrigin-RevId: b61cfc91eac83dec7ded1ef1e6d9f9776751d2c0