[LAA] Check accesses don't overlap early to determine NoDep (#92307)
Use getStartAndEndForAccess to compute the start and end of both src and sink (factored out to helper in bce3680f). If they do not overlap (i.e. SrcEnd <= SinkStart || SinkEnd <= SrcStart), there is no dependence, regardless of stride. PR: https://github.com/llvm/llvm-project/pull/92307
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