[CINN] Merge append if for neighboring loop var

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[CINN] Merge append if for neighboring loop var #69607

Closed huangjiyi closed 4 days ago

huangjiyi commented 4 days ago

PR Category

CINN

PR Types

Improvements

Description

Pcard-76996

之前在多下游融合 AppendIters 融合策略中，我们对每个无用的 append loop 添加了 if 限制，已避免全局变量的重复读写，但这些增加的 if 也带来了额外的开销导致性能下降，本次 PR 将对应相邻循环的 append if 进行融合，以减少 append if 的数量

paddle-bot[bot] commented 4 days ago

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