Richard Smith 04765ae01e [modules] If we re-enter a submodule from within itself (when submodule ...

visibility is enabled) or leave and re-enter it, restore the macro and module
visibility state from last time we were in that submodule.

This allows mutually-#including header files to stand a chance at being
modularized with local visibility enabled.

llvm-svn: 237871

2015-05-21 01:20:10 +00:00

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