[Bug d/94425] [D] Consider always settings ASM_VOLATILE_P on asm statements

[ibuclaw at gdcproject dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94425

--- Comment #3 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
For now I'll default it to ASM_VOLATILE_P.  Perhaps with a possibility to turn
it off in the future as an aggressive optimization outlined in pr94496.