[llvm] [BOLT][NFC] Unset UseAssemblerInfoForParsing for emission (PR #94778)

Amir Ayupov via llvm-commits llvm-commits at lists.llvm.org
Fri Jun 7 11:26:07 PDT 2024


aaupov wrote:

> Any idea why there is a quadratic behavior? Is the LayoutOrder cache not utilized? The following code should only be executed once for each section.
> 
> ```
>         for (MCFragment &F : *FA->getParent())
>           F.setLayoutOrder(++LayoutOrder);
> ```
> 
> If you have any smaller example, I am happy to investigate by myself. My arbitrary picking one bold/test test doesn't find any repeated execution pattern.

The issue manifests only for large binaries with LSDA (C++ exceptions). RocksDB might be a suitable target. I can try to prepare the binary and add it to https://github.com/rafaelauler/bolt-tests

https://github.com/llvm/llvm-project/pull/94778


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