wangpc 8def89b5dc [RISCV] Set CostPerUse to 1 iff RVC is enabled ...

After D86836, we can define multiple cost values for
different cost models. So here we set CostPerUse to
1 iff RVC is enabled to avoid potential impact on RA.

Reviewed By: craig.topper

Differential Revision: https://reviews.llvm.org/D117741

2022-01-21 14:44:26 +08:00

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