[llvm] [LV][RFC] Generating conditional VPBB that will be skip when the mask is inactive in VPlan. (PR #141900)

[Elvis Wang via llvm-commits]

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@@ -146,6 +146,8 @@ class RISCVTTIImpl : public BasicTTIImplBase<RISCVTTIImpl> {
     return false;
   }
 
+  bool preferFlattenControlFlow() const { return false; }
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ElvisWang123 wrote:

Thanks for your comment!

Yeah, I think it will be better to default disable the conditional VPBB and just expose the TTI hook here for future per CPU tuning.

https://github.com/llvm/llvm-project/pull/141900