[fpc-devel] The 15k bounty: Optimizing executable speed for Linux x86 / LLVM

Jonas Maebe jonas at freepascal.org
Sun Oct 28 22:39:37 CET 2018

On 28/10/18 13:00, Simon Kissel wrote:
> Hi Jonas,
> [exceptions for invalid memory accesses]
>> have been working a bit on it since then). This is not something that
>> can be changed/fixed in FPC, and is quite different from how FPC's
>> current code generator works (I don't know how Embarcardero deals with
>> it in their LLVM-based code generator).
> Someone could do some reverse engineering to learn more
> about how they have solved the problem (unlike actually copying
> code I don't see any legal or ethical problem in learning from
> reversing).

Well, maybe they didn't... Optimizations based on undefined behaviour 
are a major feature of LLVM.


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