Chandler Carruth ace8c8f765 [PM] Sink the "Expression" type for GVN into the class as a private ...

member type.

Because of how this type is used by the ValueTable, it cannot actually
have hidden visibility. GCC actually nicely warns about this but Clang
just silently ... I don't even know. =/ We should do a better job either
way though.

This should resolve a bunch of the GCC warnings about visibility that
the port of GVN triggered and make the visibility story a bit more
correct.

llvm-svn: 263250

2016-03-11 16:25:19 +00:00

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