For wide types, also check second part of the destination
For wide types, also check second part of the destination

Summary: As title. Missed to check the second register for wide instructions when checking if a register was overwritten.

Reviewed By: thezhangwei

Differential Revision: D7472432

fbshipit-source-id: 85540012b4510c74546838c3707d7686b84e1a92

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