For pwr9 cpu, we can save xvnegsp instruction. Alive2 proof https://alive2.llvm.org/ce/z/LWaEEg.
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Differential D151055
[PowerPC] Use ABDU to replace ABDS when operands are known to be zero extended lkail on May 21 2023, 8:52 PM. Authored by
Details For pwr9 cpu, we can save xvnegsp instruction. Alive2 proof https://alive2.llvm.org/ce/z/LWaEEg.
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