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b86fbcb08c
This avoids copying the container by simply deleting until empty. While I'd rather move to a stricter ownership semantic (unique_ptr), SmallPtrSet can't cope with unique_ptr and the ownership semantics here are a bit incestuous (Module sort of owns itself, but sort of doesn't (if the LLVMContext is destroyed before the Module, then it deregisters itself from the context... )). Ideally Modules would be given to the context, or possibly an emplace-like function to construct them there. Modules then shouldn't be destroyed by LLVM API clients, but by interacting with the owner (LLVMContext) directly (but even then, passing a Module* to LLVMContext doesn't provide an easy way to destroy the Module, since the set would be over unique_ptrs and you'd need a heterogenous lookup function which SmallPtrSet doesn't have either). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206794 91177308-0d34-0410-b5e6-96231b3b80d8
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