llvm dev - Apr 2019 - How can change ADD instruction to SUB instruction

Hi All,

I have ADD instruction but I want change to SUB instruction in MachineCSE.cpp
file.

Eg:
%8:gpr32 = MOVi32imm -655360000
nsw ADDWrr killed %7:gpr32, killed %8:gpr32

expected:
%8:gpr32 = MOVi32imm 655360000
nsw SUBSWrr killed %7:gpr32, killed %8:gpr32

Could any one please give your suggestions on this.

Thanks and Regards,
Ramakota Reddy.



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