[PATCH] D120327: compiler-rt: Add udivmodei5 to builtins and add bitint library

[Jacob Lifshay via Phabricator via llvm-commits]

programmerjake added a comment.

In D120327#3399900 <https://reviews.llvm.org/D120327#3399900>, @erichkeane wrote:

> This sounds like a really good idea to me.  The LLVM code generation "Knows" how big this value needs to be and can do it on the stack of the caller.  So it would generate IR the equivalent of:
>
>   ...
>
> Right?

looks good to me! I think the buffer should be big enough for the Knuth division algorithm (the one APInt uses afaict), even if we decide we want the shift-subtract algorithm at first...that way we can upgrade later.


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  https://reviews.llvm.org/D120327/new/

https://reviews.llvm.org/D120327