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
Identify patterns where the address is aligned to an 8-byte boundary, but both the base address and the constant offset are both proper multiples of 4. In such cases, extract Base+4 into a separate instruc- tion, and use S2_storerd_io, instead of using S4_storerd_rr. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277497 91177308-0d34-0410-b5e6-96231b3b80d8