[PATCH] D142721: [SCCP] Support NUW/NSW inference for all overflowing binary operators.

Tue Apr 25 04:55:09 PDT 2023

fhahn added a comment.

In D142721#4294922 <https://reviews.llvm.org/D142721#4294922>, @nikic wrote:

> In D142721#4294180 <https://reviews.llvm.org/D142721#4294180>, @tstellar wrote:
>
>> In D142721#4292972 <https://reviews.llvm.org/D142721#4292972>, @tstellar wrote:
>>
>>> This commit is causing a segfault when building python 3.11.3 on ppc64le.  I'm still working on gathering more info.
>>
>> I've tracked this down to the C function that is miscompiled/buggy.  What kind of dumps can I provide that would be the most useful for debugging?
>
> The input IR (`-S -emit-llvm -Xclang -disable-llvm-optzns`) would probably be enough. Which one is the problematic function?

That would be helpful or the full module IR before IPSCCP/SCCP run on the function.

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D142721/new/

https://reviews.llvm.org/D142721