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...ts when most are actually shared and don't get deleted. It sounds like the metadata nodes are weird in that they are mostly disjoint between modules. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20131112/b4ef29e5/attachment.html>

On Nov 12, 2013, at 4:59 PM, Chandler Carruth <chandlerc at google.com> wrote: > Other options are: > 1> Using a different LLVMContext for the destination module, but it didn’t work out since Linker was not designed to work with different LLVMContexts for source vs destination. > 2> removeUnusedMDNodes checks if a MDNode is used in a different way (i.e use_empty() &&