[llvm-commits] [PATCH] Lazily Link functions

[Tanya Lattner]

The attached patch will only link functions marked with specific linkage (Internal, LO_ODR, or LO linkage) if they have uses in the destination module. Instead of automatically linking, these functions are placed onto a worklist to be processed in the final stage of linking. We iterate over the list and if any functions on the list have uses in the destination module, we link them in and repeat the process until no changes in the state (uses) has changed. This means that any functions in the LazilyLink worklist that have a use in the destination module will be linked in and none that don't. 

Please review.

Thanks,
Tanya
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