[llvm-dev] Optimal variant of regbankselect

[Gabriel Hjort Åkerlund via llvm-dev]

Hi all,

 

I have made an attempt of implementing an optimal variant of the register
bank selector (regbankselect). The code is available for review at
https://reviews.llvm.org/D90304, and I would greatly appreciate if anyone
interested can provide their comments. I have run a few tests the
regbankselect-*.mir testcases for AAarch64 and it seems to work, but more
tests are surely needed to increase confidence in the implementation. I also
tried using AMDGPU, but that backend does not provide the full list of
InstructionMappings for a given MachineInstr, which is needed in order to
compute the optimal selection of register banks.

 

Cheers,

Gabriel Hjort Åkerlund 

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