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

[Sven Barth]

Am 25.10.2018 um 20:34 schrieb Jonas Maebe:
> On 25/10/18 20:13, Florian Klämpfl wrote:
>> Am 25.10.2018 um 18:59 schrieb Jonas Maebe:
>>> On 20/10/18 16:07, Simon Kissel wrote:
>>>> - Complete the LLVM branch of FPC. It looks like Jonas has stopped
>>>>     working on it two years ago, which is a pity.
>>> I didn't stop working on it, but I didn't make real progress anymore 
>>> either. The current state of the LLVM code
>>> generator is that everything works on Darwin/x86-64, except for
>>> a) exception handling in general: indeed needs DWARF-EH support in 
>>> the RTL,
>> This is something I would like to work for years on already. So maybe 
>> its now a good opportunity to start with it.
>>
>> I started a branch for 
>> it:https://svn.freepascal.org/svn/fpc/branches/debug_eh
>>
>> As a first step, I'll depend on libgcc unwinding, let's see how far 
>> we get.
>
> Using libgcc's foreign exception support works somewhat, but is not 
> very usable in practice due to the limitation of having only one 
> exception in flight. I simply started translating all of libgcc's 
> exception support to Pascal, since it's also licensed under LGPL + 
> linking exception (I took the one from gcc 4.2.1 for the people who 
> don't like (L)GPL3).
As you already started working on translating that part of libgcc, would 
you please provide what you have so far? :)

Regards,
Sven