Getting LLVM ERROR: Branch target out of insn range

[kupermind]

Hi guys! When compiling a code for solana via solang I am getting the following error if I add one more state variable in the contract:

info: contract ServiceRegistrySolana uses at least 4152 bytes account data
info: Generating LLVM IR for contract ServiceRegistrySolana with target solana
LLVM ERROR: Branch target out of insn range
zsh: abort      npm run build

The working code is located here:
https://github.com/valory-xyz/autonolas-registries/tree/solana

Steps to reproduce the working code:

git clone --recursive https://github.com/valory-xyz/autonolas-registries.git
git checkout 573ced9e1d1d3d070bc26a58da8b6b04e5291be6
cd autonolas-registries/integrations/solana
yarn
npm run build
npm run test

Now try to declare a single variable on line 66, for example, address public var, in the following file:
https://github.com/valory-xyz/autonolas-registries/tree/573ced9e1d1d3d070bc26a58da8b6b04e5291be6/integrations/solana/contracts/ServiceRegistrySolana.sol

Then try to recompile with npm run build or a custom solang build command, and the build will fail with the specified error.

The Solang version is v0.3.0, the platform is MacOs, although tried on the latest Linux as well and got the same result.

In order to make it work with that additional state variable, I need to comment the code out starting from the line 797, which might point to some contract size issues. Although if I were to add mapping instead of a primitive variable, then the original code would compile, just increasing the bytes account data. So the issue is really related to the primitive state variables.

Thanks a lot for your help!

[LucasSte]

Hey @kupermind,
Can you provide the exact contract that fails for you?
I copied the file you liked and added a new variable address public var in line 66, but I could not replicate the error.

[kupermind]

Hi @LucasSte,

Please checkout the following branch: llvm_insn_range_solana
The ServiceRegistrySolana.sol contract fails right from the start, you just need to do the described steps:

git clone --recursive https://github.com/valory-xyz/autonolas-registries.git
git checkout llvm_insn_range_solana
cd autonolas-registries/integrations/solana
yarn
npm run build

The build must fail with the specified error.

Thanks a lot!

[LucasSte]

Thanks @kupermind, I was able to replicate the error. I'll look into it and keep you posted.

[LucasSte]

I am still investigating the problem, but I've found some options that make your contract work, so you can continue your development until we find a fix.

You can use the --release flag to build your contract if you do not care about the print() function or runtime error messages.

If you care about them for testing, use the -Oless flag, which disables LLVM optimizations. This option makes your contract slower and consume more compute units.

[kupermind]

That is great! Thank you very much for the hints!!

[LucasSte]

I've found the problem and a fix: #1386. I can't merge that yet because your contract also causes a stack overflow in constant folding, so I need to solve this first.

[kupermind]

Hey @LucasSte,

Great and thanks a lot for the update! We were happy with your previous --release flag recommendation, however it would be great once the fix is merged, easier to see reverts by default :).