[llvm] Add freeze for LowerSELECT (PR #148796)

[Matt Arsenault via llvm-commits]

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@@ -11071,11 +11071,17 @@ SDValue SITargetLowering::LowerSELECT(SDValue Op, SelectionDAG &DAG) const {
       VT.getSizeInBits() == 512)
     return splitTernaryVectorOp(Op, DAG);
 
-  assert(VT.getSizeInBits() == 64);
 
   SDLoc DL(Op);
   SDValue Cond = Op.getOperand(0);
-
+  if (Cond.getOpcode() == ISD::SETCC) {
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arsenm wrote:

It doesn't matter what the source operation is, the freeze is potentially needed anyway (it's really the non-compare cases that are most interesting here)

https://github.com/llvm/llvm-project/pull/148796