[CINN][Backend Pass Update No.11] Update schedule_block_dce pass #70498
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| #include "paddle/cinn/optim/schedule_block_dce.h" | ||
| #include "paddle/cinn/optim/schedule_block_dce_pass.h" |
| @@ -14,6 +14,7 @@ | |||
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| #pragma once | |||
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| #include "paddle/cinn/ir/utils/stmt_converter.h" | |||
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这里头文件不需要stmt_converter.h吧
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| void VisitStmt(IfThenElse stmt) override { | ||
| VisitBlock(stmt->true_case()); | ||
| if (stmt->false_case().defined()) { | ||
| VisitBlock(stmt->false_case()); | ||
| } | ||
| if (IsEmptyIf(stmt)) { | ||
| const BlockRef empty_block = _Block_::Make({}); | ||
| stmt->set_true_case(empty_block); | ||
| stmt->set_false_case(empty_block); | ||
| } | ||
| } | ||
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| void VisitStmt(For stmt) override { | ||
| VisitBlock(stmt->body()); | ||
| if (IsEmptyBlock(stmt->body())) { | ||
| stmt->set_body(ir::stmt::_Block_::Make({})); | ||
| } | ||
| } |
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这里不需要实现成一个StmtMutator了，嵌套的情况PassManager会解决，只需要考虑当前block这个层级即可。这里可以删除的stmt种类就只有If, For, Schedule，写出相应的判断逻辑标记一下，在当前处理的Block里面删掉它们就可以了
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PR Category
CINN
PR Types
Improvements
Description
改造了 EliminateDeadScheduleBlock Pass