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d6238e7b7e
This speeds up the dependency calculations for blocks with many load/store/call instructions. Beside the improved runtime, there is no functional change. Compared to the original commit, this re-applied commit contains a bug fix which ensures that there are no incorrect collisions in the alias cache. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225977 91177308-0d34-0410-b5e6-96231b3b80d8