================
@@ -749,6 +749,11 @@ def TuningUseGLMDivSqrtCosts
: SubtargetFeature<"use-glm-div-sqrt-costs", "UseGLMDivSqrtCosts", "true",
"Use Goldmont specific floating point div/sqrt costs">;
+// Starting with Redwood Cove architecture, the branch has branch taken hint
+// (i.e., instruction prefix 3EH).
+def TuningBranchHint: SubtargetFeature<"branch-hint", "HasBranchHint", "true",
----------------
RKSimon wrote:
Why have you added this as a Tuning bit and not a Feature bit? Tuning bits are
guaranteed to work on all applicable CPUs - they just might not be performant.
https://github.com/llvm/llvm-project/pull/97721
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