[llvm] [SelectionDAG] Allow vselect in foldBinOpIntoSelect (PR #143283)

[Simon Pilgrim via llvm-commits]

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@@ -13435,7 +13438,7 @@ static SDValue tryToFoldExtendOfConstant(SDNode *N, const SDLoc &DL,
   // fold (sext (select cond, c1, c2)) -> (select cond, sext c1, sext c2)
   // fold (zext (select cond, c1, c2)) -> (select cond, zext c1, zext c2)
   // fold (aext (select cond, c1, c2)) -> (select cond, sext c1, sext c2)
-  if (N0->getOpcode() == ISD::SELECT) {
+  if (N0->getOpcode() == ISD::SELECT || N0->getOpcode() == ISD::VSELECT) {
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RKSimon wrote:

Split this and the fmul negation changes into their own patches with test coverage

https://github.com/llvm/llvm-project/pull/143283