[PATCH] D136736: [LSR][TTI][RISCV] Add isAllowDropLSRSolution into TTI and enable it for RISC-V

[Yueh-Ting (eop) Chen via Phabricator via llvm-commits]

eopXD added a comment.

Benchmark results if Spec2k6 on FPGA with our downstream compiler under the patch applied shows significant difference in the following benchmarks and little difference for the others.

- 2.6% runtime improvement in perlbench
- 1.5% runtime improvement in hmmer
- 1.3% runtime regression in sjeng


Repository:
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  https://reviews.llvm.org/D136736/new/

https://reviews.llvm.org/D136736