[llvm] [VectorCombine] Fix crash in scalarizeVPIntrinsic (PR #72039)

[Michael Maitland via llvm-commits]

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@@ -843,6 +843,8 @@ bool VectorCombine::scalarizeVPIntrinsic(Instruction &I) {
 
   Value *ScalarOp0 = getSplatValue(Op0);
   Value *ScalarOp1 = getSplatValue(Op1);
+  if (!ScalarOp0 || !ScalarOp1)
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michaelmaitland wrote:

Sure. Do you know why getSplatValue fails to get the splat even though isSplatValue returns true? That sounds like a bug to me?

https://github.com/llvm/llvm-project/pull/72039