[llvm-exegesis] Exclude loads/stores from aliasing instruction set (#156300) In the serial snippet generator and function that computes the aliasing instructions, we don't want to include load/store instructions to create a chain as that could make the results more unreliable. There is a hasMemoryOperands() check, but currently that looks like a X86 way for checking for loads/stores. For AArch64 and other architectures, we should check mayLoad() and mayStore().
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