[llvm] [VPlan] Strip dead code in cst live-in match (NFC) (PR #159589)

[Florian Hahn via llvm-commits]

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@@ -109,10 +109,6 @@ template <typename Pred, unsigned BitWidth = 0> struct int_pred_ty {
     if (!V)
       return false;
     const auto *CI = dyn_cast<ConstantInt>(V);
-    if (!CI && V->getType()->isVectorTy())
-      if (const auto *C = dyn_cast<Constant>(V))
-        CI = dyn_cast_or_null<ConstantInt>(
-            C->getSplatValue(/*AllowPoison=*/false));
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fhahn wrote:

Can you assert instead, so we catch this if we ever add support for vector live-ins?

https://github.com/llvm/llvm-project/pull/159589