Michael Liao 4b11201592 [MachineInstr] Add support for instructions with multiple memory operands. ...

- Basically iterate each pair of memory operands from both instructions
  and return true if any of them may alias.
- The exception are memory instructions without any memory operand. They
  may touch everything and could alias to any memory instruction.

Differential Revision: https://reviews.llvm.org/D89447

2020-11-03 20:44:40 -05:00

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