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being separate was that it can grow the use list. As a consequence, we can't use the iterator-pair interface, we need an index based interface. Expose such an interface from the AllocaPartitioning, and use it in the speculator. This should at least fix a use-after-free bug found by Duncan, and may fix some of the other crashers. I don't have a nice deterministic test case yet, but if I get a good one, I'll add it. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165027 91177308-0d34-0410-b5e6-96231b3b80d8