[llvm] [DAG] combineVSelectWithAllOnesOrZeros - fold select Cond, 0, x -> and not(Cond), x (PR #147472)

[Simon Pilgrim via llvm-commits]

================
@@ -9902,11 +9902,14 @@ SDValue DAGCombiner::visitXOR(SDNode *N) {
     if (SDValue Combined = visitADDLike(N))
       return Combined;
 
-  // fold !(x cc y) -> (x !cc y)
+  // fold xor (setcc x y cc) -1 -> setcc x y !cc
+  // Avoid breaking: and (xor (setcc x y cc) -1) z -> andn for vec
   unsigned N0Opcode = N0.getOpcode();
   SDValue LHS, RHS, CC;
   if (TLI.isConstTrueVal(N1) &&
-      isSetCCEquivalent(N0, LHS, RHS, CC, /*MatchStrict*/ true)) {
+      isSetCCEquivalent(N0, LHS, RHS, CC, /*MatchStrict*/ true) &&
+      !(N->hasOneUse() && TLI.hasAndNot(SDValue(N, 0)) &&
+        N->use_begin()->getUser()->getOpcode() == ISD::AND && VT.isVector())) {
----------------
RKSimon wrote:

Put the use logic later as its often more computationally expensive:
```
!(VT.isVector() && TLI.hasAndNot(SDValue(N, 0)) &&
  N->hasOneUse() && N->use_begin()->getUser()->getOpcode() == ISD::AND)
```

https://github.com/llvm/llvm-project/pull/147472