| commit | 0679d2d0a45ba1eec6831adc6afa3c46a7ae9a9a | [log] [tgz] |
|---|---|---|
| author | Jiangning Liu <jiangning.liu@arm.com> | Mon Aug 11 05:17:19 2014 +0000 |
| committer | Jiangning Liu <jiangning.liu@arm.com> | Mon Aug 11 05:17:19 2014 +0000 |
| tree | fe09b435be0e22bceb412d815d6b9c7395265e7e | |
| parent | 1505fa4376fb5c97625efa36d83beca49b864b2d [diff] |
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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215344 91177308-0d34-0410-b5e6-96231b3b80d8