[llvm] [AArch64] Fix lowering of non-power2 uitofp (PR #190921)

[David Green via llvm-commits]

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@@ -4649,6 +4649,9 @@ SDValue DAGTypeLegalizer::SplitVecOp_TruncateHelper(SDNode *N) {
   if (getTypeAction(FinalVT) == TargetLowering::TypeScalarizeVector)
     return SplitVecOp_UnaryOp(N);
 
+  if (IsFloat && !isPowerOf2_32(InElementSize))
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davemgreen wrote:

It was so that the above SplitVecOp_UnaryOp(N) could apply, IIRC.

https://github.com/llvm/llvm-project/pull/190921