tblah wrote:

Hi @yus3710-fj, thanks for investigating the cause of the regression.

There was a recent patch which improved bwaves performance: 
https://github.com/llvm/llvm-project/pull/111853. It seems that since this 
patch, I no longer see a regression with the integer overflow enabled so I 
would be happy to re-land your patch. Please feel free to open a new PR.

I think #117318 is still a real issue, just we happen not to run out of 
registers anymore now that there is better constant propagation.

I tested this on an AWS graviton 3 (neoverse-v1) machine.

https://github.com/llvm/llvm-project/pull/110063
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