Philip Reames db07d79ab0 [RISCV] Add cost model for integer and float vector arithmetic instructions.
This patch implements getArithmeticInstrCost for RISCV, supports cost
model for integer and float vector arithmetic instructions.

Differential Revision: https://reviews.llvm.org/D133552 (Original patch by jacquesguan.  Subset by me with todos added.)
2022-11-28 09:04:38 -08:00
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