Re: C++ compiler excessive memory usage?

[Havard Eidnes <he%NetBSD.org@localhost>]

> On Mon, Oct 12, 2026 at 05:54:12PM +0200, Havard Eidnes wrote:
>> The file from 19% to 99% consists of this function which has a
>> single static table inside of it:
>> 
>> const uint8_t *RISCVInstructionSelector::getMatchTable() const {
>> 
>>   constexpr static uint8_t MatchTable0[] = {
>> ....
>>   };
>>   return MatchTable0;
>> }
>
> Oh *******,
>
> try to patch it like this?
>
> const uint8_t *RISCVInstructionSelector::getMatchTable() const {
>    static const uint8_t MatchTable0[] = {
> 	 ....
>    };
>    return MatchTable0;
> }
>
> Not sure what it buys the other way if the function is not
> declared as constexpr (besides driving the commpiler mad).

It doesn't look too primising, I'm afraid.  I'm building the
preprocessed file, patched as above, and "env TERM=dumb top -I |
grep <pid>" is currently showing:

16356 he        83    4  6263M 1881M biowait    17:06  4.88%  4.88% cc1plus
16356 he        82    4  6263M 1882M biowait    17:07  3.52%  3.52% cc1plus
16356 he        83    4  6263M 1883M biowait    17:07  5.86%  5.86% cc1plus
16356 he        83    4  6263M 1880M RUN        17:07  4.88%  4.88% cc1plus

It has yet to complete, and I need to go somewhere else...

Regards,

- Håvard