Re: gcc inlining heuristics was Re: [PATCH -v7][RFC]: mutex: implementadaptive spinning

[Linus Torvalds]

On Sun, 11 Jan 2009, Andi Kleen wrote:
> 
> Was -- i think that got fixed in gcc. But again only in newer versions.

I doubt it. People have said that about a million times, it has never 
gotten fixed, and I've never seen any actual proof.

I think that what got fixed was that gcc now at least re-uses stack slots 
for temporary spills. But only for things that fit in registers - not if 
you actually had variables that are big enough to be of type MEM. And the 
latter is what tends to eat stack-space (ie structures etc on stack).

But hey, maybe it really did get fixed. But the last big stack user wasn't 
that long ago, and I saw it and I have a pretty recent gcc (gcc-4.3.2 
right now, it could obviously have been slightly older back a few months 
ago).

		Linus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/