Mark Searles 987f292c56 [AMDGPU] prevent hitting Assertion `isReg() && "Wrong MachineOperand accessor"' ...

The use iterator, used within findMaskOperands(), can return anything which is
not a def. isUse() requires a register, so check isReg() before calling isUse().

Differential Revision: https://reviews.llvm.org/D48047

llvm-svn: 334459

2018-06-12 00:41:26 +00:00

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