On Tue, Nov 5, 2024 at 11:43 AM Andreas Schwab <sch...@linux-m68k.org> wrote: > > On Nov 05 2024, Uros Bizjak wrote: > > > But what is the non-deprecated way to communicate the fact that SP > > changes, and possibly clobbers stack in the asm to the compiler? > > Since an asm statement is not allowed to change SP there is no need for > that.
asm volatile ("pushfq; popfq %0" : "=r"(x)); doesn't change SP at any sequence point, doesn't clobber the function frame, but the function using it shouldn't create redzone. How to communicate this to the compiler? Uros.