Quentin Colombet a12f1d6a52 [MachineInstr] Add a dumpr method ...

Add a dump method that recursively prints an instruction and all
the instructions defining its operands and so on.

This is helpful when looking at combiner issue.

NFC

Differential Revision: https://reviews.llvm.org/D75094

2020-02-25 10:46:29 -08:00

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