[llvm] [LV] Limits the splat operations be hoisted must not be defined by a recipe. (PR #117138)

[Mel Chen via llvm-commits]

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@@ -264,7 +265,11 @@ Value *VPTransformState::get(VPValue *Def, bool NeedsScalar) {
     return Data.VPV2Vector[Def];
 
   auto GetBroadcastInstrs = [this, Def](Value *V) {
-    bool SafeToHoist = Def->isDefinedOutsideLoopRegions();
+    bool SafeToHoist =
+        !Def->hasDefiningRecipe() ||
+        VPDT.properlyDominates(Def->getDefiningRecipe()->getParent(),
+                               Plan->getVectorPreheader());
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Mel-Chen wrote:

Ping @fhahn  

https://github.com/llvm/llvm-project/pull/117138