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LLVM backend for 6502
b6fdca612d
removal. We can't just blindly increment (or decrement) the adapted iterator when the value is null because doing so can walk past the end (or beginning) and keep inspecting the value. The fix I've implemented is to restrict this further to a forward iterator and add an end iterator to the members (replacing a member that had become dead when I switched to the adaptor base!) and using that to stop the iteration. I'm not entirely pleased with this solution. I feel like forward iteration is too restrictive. I wasn't even happy about bidirectional iteration. It also makes the iterator objects larger and the iteration loops more complex. However, I also don't really like the other alternative that seems obvious: a sentinel node. I'm still hoping to come up with a more elegant solution here, but this at least fixes the MSan and Valgrind errors on this code. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207743 91177308-0d34-0410-b5e6-96231b3b80d8 |
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