Rafael Espindola 54606d57a2 Add 171048 back but invalidate the cache of all redeclarations when setting ...

the body of a functions. The problem was that hasBody looks at the entire chain
and causes problems to -fvisibility-inlines-hidden if the cache was not
invalidated.

Original message:

Cache visibility of decls.

This unifies the linkage and visibility caching. I first implemented this when
working on pr13844, but the previous fixes removed the performance advantage of
this one.
This is still a step in the right direction for making linkage and visibility
cheap to use.

llvm-svn: 171053

2012-12-25 07:31:49 +00:00

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