llvm-project

27b60805 - [RISCV] Increase default tail duplication threshold to 6 at -O3 (#98873)

[RISCV] Increase default tail duplication threshold to 6 at -O3 (#98873) This is just like AArch64. Changing the threshold to 6 will increase the code size, but will also decrease unconditional branches. CPUs with wide fetch/issue units can benefit from it. The value 6 may be debatable, we can set it to `SchedModel.IssueWidth`.