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e9359f427e
1) check whether the alignment of the memory is sufficient for the *merged* store or load to be efficient. Not doing so can result in some ridiculously poor code generation, if merging creates a vector operation which must be aligned but isn't. 2) DON'T check that the alignment of each load/store is equal. If you're merging 2 4-byte stores, the first *might* have 8-byte alignment, but the second certainly will have 4-byte alignment. We do want to allow those to be merged. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236850 91177308-0d34-0410-b5e6-96231b3b80d8