假设有一个具有互斥分支的循环流；每个分支都有一些应用于该分支中所有活动的前置条件和不变量。
Consider a cyclic flow that has mutually exclusive branches; each branch has preconditions and invariants that apply to all activities in the branch.
使用截断和边带不变量转换，如循环移位等，对初始的CAZAC序列进行修改。
By using truncation and sideband invariant switch like a cyclic shift, etc., the initial CAZAC sequence can be modified.
此优化将不变量子表达式从循环体中移除。
This optimization removes invariant subexpressions from the body of a loop.
此优化将不变量子表达式从循环体中移除。
This optimization removes invariant subexpressions from the body of a loop.
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