[Bug c/90817] i386 inline assembly invalid register emitted

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90817

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
https://gcc.gnu.org/onlinedocs/gcc-9.1.0/gcc/Extended-Asm.html#x86-Operand-Modifiers