Having the super-reg wrapper over the SPE registers in PPC

Code Generation
1

Hi ,

To address the Redundant save and restore the GPR and SPE registers . · Issue #57307 · llvm/llvm-project · GitHub issue ,we are thinking have the reg list (like low and high) for the SPE registers ,and we are exploring the liveness api’s (that gives which part of reg is modified ) .

Currently we are referring the X86 for the reference and we would like to know did some-one already tried with PPC ?

~Umesh

2

we are thinking have the reg list (like low and high) for the SPE registers ,and we are exploring the liveness api’s (that gives which part of reg is modified ) .

I don’t understand exactly what this means, but in general code should move to using RegUnit based liveness queries, and not rely on physical register equality checks