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Summary

  1. [AMDGPU] Allow tied operand subreg folding (details)
Commit 48f57138be55a939afc64d357f7b26220206127a by Stanislav.Mekhanoshin
[AMDGPU] Allow tied operand subreg folding
Turns out it makes sense, contrarily to what comment said.
Differential Revision: https://reviews.llvm.org/D69287
The file was modifiedllvm/lib/Target/AMDGPU/SIFoldOperands.cpp
The file was modifiedllvm/test/CodeGen/AMDGPU/fold-vgpr-copy.mir