[DAG] combineVSelectWithAllOnesOrZeros - missing freeze

[RKSimon]

With #145298 we forgot to ensure that the selected operand was frozen - see foldVSelectToSignBitSplatMask for reference

I've included the alive2 for the select Cond, -1, x → or Cond, x fold here: https://alive2.llvm.org/ce/z/fwT9Si - but you should confirm the other 2 folds require this as well.

CC @woruyu

[llvmbot]

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[llvmbot]

@llvm/issue-subscribers-good-first-issue

Author: Simon Pilgrim (RKSimon)

With #145298 we forgot to ensure that the selected operand was frozen - see foldVSelectToSignBitSplatMask for reference

I've included the alive2 for the select Cond, -1, x → or Cond, x fold here: https://alive2.llvm.org/ce/z/fwT9Si - but you should confirm the other 2 folds require this as well.

CC @woruyu

[woruyu]

I would like to confirm this! thank you!@RKSimon