[llvm-dev] Optimal variant of regbankselect

[Dominik Montada via llvm-dev]

Hi Gabriel,

thank you so much for doing this! I'll try out the patch in our 
downstream implementation right away. Do you know how big of an impact 
this has on compile time compared to fast and greedy?

Cheers,

Dominik

Am 28.10.20 um 14:32 schrieb 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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> llvm-dev at lists.llvm.org
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