warning: listing the stack pointer register 'esp' in a clobber list is deprecated

[J.W. Jagersma]

On 2019-05-27 19:02, Segher Boessenkool wrote:
> The simple and reliable way of forcing a frame pointer is to write
> 
> 	if (__builtin_frame_address(0)) {
> 		/* Force a frame pointer for this function.  */
> 	}
> 
Thanks, this appears to work perfectly. But I don't see how it can
guarantee that "m" operands are never accessed through esp? I guess
ideally there would be a specific constraint for this seemingly common
scenario.