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In Machine CSE pass, the source register of a COPY machine instruction can

Description

In Machine CSE pass, the source register of a COPY machine instruction can
be propagated to all its users, and this propagation could increase the
probability of finding common subexpressions. If the COPY has only one user,
the COPY itself can be removed.

Details

Committed
JiangningAug 10 2014, 10:17 PM
Parents
rL215343: In LVI(Lazy Value Info), originally value on a BB can only be caculated once,
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