[Bug middle-end/119279] Specifying frame pointer dependency in inline asm

[torvalds@linux-foundation.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119279

--- Comment #2 from Linus Torvalds <torvalds@linux-foundation.org> ---
(In reply to Andrew Pinski from comment #1)
> 
> Why is the call needs to be done in the inline-asm?

Typically it's the fallback alternative for when the primary inline asm doesn't
work 

Ie the "real" asm may be something like a cmpxchg16b, but then it gets
rewritten as a call if the CPU does not support that instruction. 

But sometimes it's an actual call, just with special calling conventions (eg
firmware call to EFI or whatever).