[llvm-branch-commits] [llvm] [LoopVectorizer] Bundle partial reductions inside VPMulAccumulateReductionRecipe (PR #136173)

[Sander de Smalen via llvm-branch-commits]

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@@ -2432,12 +2437,40 @@ static void tryToCreateAbstractReductionRecipe(VPReductionRecipe *Red,
   Red->replaceAllUsesWith(AbstractR);
 }
 
+/// This function tries to create an abstract recipe from a partial reduction to
+/// hide its mul and extends from cost estimation.
+static void
+tryToCreateAbstractPartialReductionRecipe(VPPartialReductionRecipe *PRed) {
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sdesmalen-arm wrote:

Does this need to be given the `Range &` and for that range to be clamped if it doesn't match or if the cost is higher than the individual operations (similar to what happens in `tryToCreateAbstractReductionRecipe`) ?

(note that the cost part is still missing)

https://github.com/llvm/llvm-project/pull/136173