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该 Pr 新增了 SamplePerfectTile 调度原语,其功能为对需要分裂的循环随机采样循环次数
参数
loop
要进行分裂的Loopn
要分裂的循环层数max_innermost_factor
最内层循环的次数限制返回
std::vector<Expr>
采样到的tile size, 其 index 越大,代表的循环越靠内部,如而为了保持该调度可 trace ,临时使用了一个 random seed 控制器,用于控制随机种子,希望建议更好方案