[llvm] [VPlan] Track VPValues instead of VPRecipes in calculateRegisterUsage. (PR #155301)

[Florian Hahn via llvm-commits]

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@@ -519,14 +520,16 @@ SmallVector<VPRegisterUsage, 8> llvm::calculateRegisterUsageForPlan(
   for (unsigned int Idx = 0, Sz = Idx2Recipe.size(); Idx < Sz; ++Idx) {
     VPRecipeBase *R = Idx2Recipe[Idx];
 
-    // Remove all of the recipes that end at this location.
-    RecipeList &List = TransposeEnds[Idx];
-    for (VPRecipeBase *ToRemove : List)
+    // Remove all of the VPValues that end at this location.
+    VPValueList &List = TransposeEnds[Idx];
+    for (VPValue *ToRemove : List)
       OpenIntervals.erase(ToRemove);
 
     // Ignore recipes that are never used within the loop and do not have side
     // effects.
-    if (!Ends.count(R) && !R->mayHaveSideEffects())
+    if (all_of(R->definedValues(),
+               [&Ends](VPValue *Def) { return !Ends.count(Def); }) &&
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fhahn wrote:

doen thanks

https://github.com/llvm/llvm-project/pull/155301