[llvm] [RISCV] Add TuneJumpIsExpensive (PR #191374)

[Sam Elliott via llvm-commits]

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@@ -2051,6 +2051,10 @@ def TunePreferVsetvliOverReadVLENB
           "prefer-vsetvli-over-read-vlenb", "PreferVsetvliOverReadVLENB",
           "true", "Prefer vsetvli over read vlenb CSR to calculate VLEN">;
 
+def TuneJumpIsExpensive
+    : RISCVSimpleTuneFeature<"jump-is-expensive", "IsJumpExpensive",
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lenary wrote:

"jump-is-cheap" might be even more clear :)

https://github.com/llvm/llvm-project/pull/191374