[llvm] [VPlan] Manage instruction medata in VPlan. (PR #135272)

[via llvm-commits]

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@@ -1796,9 +1805,10 @@ void VPWidenCastRecipe::execute(VPTransformState &State) {
   Value *A = State.get(Op);
   Value *Cast = Builder.CreateCast(Instruction::CastOps(Opcode), A, DestTy);
   State.set(this, Cast);
-  State.addMetadata(Cast, cast_or_null<Instruction>(getUnderlyingValue()));
-  if (auto *CastOp = dyn_cast<Instruction>(Cast))
+  if (auto *CastOp = dyn_cast<Instruction>(Cast)) {
     applyFlags(*CastOp);
+    applyMetadata(*CastOp);
+  }
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ayalz wrote:

Same independent consistency nit.

https://github.com/llvm/llvm-project/pull/135272