[llvm] [LV] Use vscale for tuning when updating profile information (PR #143690)

[Florian Hahn via llvm-commits]

================
@@ -2787,10 +2801,10 @@ void InnerLoopVectorizer::fixVectorizedLoop(VPTransformState &State) {
   //
   // For scalable vectorization we can't know at compile time how many
   // iterations of the loop are handled in one vector iteration, so instead
-  // assume a pessimistic vscale of '1'.
+  // use the value of vscale used for tuning.
   Loop *VectorLoop = LI->getLoopFor(HeaderBB);
-  setProfileInfoAfterUnrolling(OrigLoop, VectorLoop, OrigLoop,
-                               VF.getKnownMinValue() * UF);
+  unsigned VFxUF = getEstimatedRuntimeVF(VF * UF, Cost->getVScaleForTuning());
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fhahn wrote:

```suggestion
  unsigned EstimatedVFxUF = getEstimatedRuntimeVF(VF * UF, Cost->getVScaleForTuning());
```

Might be worth updating the name as well?

https://github.com/llvm/llvm-project/pull/143690