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[AMDGPU] Check for all meta instrs in GCNRegBankReassign

Authored by rampitec on Thu, Apr 8, 1:24 PM.

Description

[AMDGPU] Check for all meta instrs in GCNRegBankReassign

It used to work correctly even with a KILL, but there is
no reason to consider meta instructions since they do not
create real HW uses.

Differential Revision: https://reviews.llvm.org/D100135

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