https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89752
Jakub Jelinek <jakub at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> --- I've reduced it to: struct A { A (); ~A (); short c; }; void foo () { A a0, a1; __asm volatile ("" : "=rm" (a0), "=rm" (a1) : "0" (a0), "1" (a1)); } which better matches what is going on (the type is TYPE_ADDRESSABLE and that is why it has BLKmode).