Matthias Braun e29b7689bd MachineVerifier: subregs so not require defs/valnos on every path ...

It is fine for subregister ranges to be undefined on some CFG paths as
we may have a "vregX:other_subreg<read-undef> =" def on that path. We
do not (and should not) have live segments for the subregister ranges.
The MachineVerifier should not complain about this.

This is a slight variant of http://llvm.org/PR27705

llvm-svn: 270290

2016-05-20 23:02:13 +00:00

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