https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99581
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- C test (for -O2 too): char e[37540]; struct A { int c; } d; void bar (int n) { __asm__("" : : "r" (e)); } void foo (void) { __asm__("stw %1, %0" : "=o" (d.c) : "r" (0)); }