Re: [PATCH] RISC-V: Fix regression (GCC-14 compare with GCC-13.2) of SHA256 from coremark-pro

OK, thanks. Regards Robin

[PATCH] RISC-V: Fix regression (GCC-14 compare with GCC-13.2) of SHA256 from coremark-pro

This patch fixes -70% performance drop from GCC-13.2 to GCC-14 with -march=rv64gcv in real hardware. The root cause is incorrect cost model cause inefficient vectorization which makes us performance drop significantly. So this patch does: 1. Adjust vector to scalar cost by introducing v to