Kai Luo 9115c477bb [MachineCopyPropagation] Remove redundant copies after TailDup via machine-cp
Summary:
After tailduplication, we have redundant copies. We can remove these
copies in machine-cp if it's safe to, i.e.
```
$reg0 = OP ...
... <<< No read or clobber of $reg0 and $reg1
$reg1 = COPY $reg0 <<< $reg0 is killed
...
<RET>
```
will be transformed to
```
$reg1 = OP ...
...
<RET>
```

Differential Revision: https://reviews.llvm.org/D65267

llvm-svn: 371359
2019-09-09 02:32:42 +00:00
..
2018-09-07 07:56:05 +00:00
2019-05-14 03:11:24 +00:00
2019-04-29 23:25:33 +00:00
2019-03-29 17:35:56 +00:00
2017-10-10 08:46:10 +00:00
2018-12-19 15:21:07 +00:00
2019-06-17 09:13:29 +00:00
2019-06-17 09:13:29 +00:00
2019-06-17 09:13:29 +00:00
2017-01-22 20:28:56 +00:00
2019-08-23 19:04:47 +00:00