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CombinerAA cannot assume that different FrameIndex's never alias, but can instead use MachineFrameInfo to get the actual offsets of these slots and check for actual aliasing. This fixes CodeGen/X86/2010-02-19-TailCallRetAddrBug.ll and CodeGen/X86/tailcallstack64.ll when CombinerAA is enabled, modulo a different register allocation sequence. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114348 91177308-0d34-0410-b5e6-96231b3b80d8