Carl Ritson b70cb50204 [AMDGPU] Minimize number of s_mov generated by copyPhysReg ...

Generate the minimal set of s_mov instructions required when
expanding a SGPR copy operation in copyPhysReg.

Reviewed By: foad

Differential Revision: https://reviews.llvm.org/D89187

2020-10-15 22:35:02 +09:00

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