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* [modules] Don't emit initializers for VarDecls within a module eagerly wheneverRichard Smith2016-07-205-0/+8
| | | | | | | | | | | | we first touch any part of that module. Instead, defer them until the first time that module is (transitively) imported. The initializer step for a module then recursively initializes modules that its own headers imported. For example, this avoids running the <iostream> global initializer in programs that don't actually use iostreams, but do use other parts of the standard library. llvm-svn: 276159
* Revert r275481, r275490. This broke modules bootstrap.Richard Smith2016-07-155-8/+0
| | | | llvm-svn: 275624
* Add test inputs missed by r275481.Richard Smith2016-07-145-0/+8
llvm-svn: 275490
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