https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112499
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Or consider typedef unsigned __INTPTR_TYPE__ uintptr_t; volatile int v; int foo (int x) { static uintptr_t a = ((char *)&&l2 - (char *)&&l1) + ((char *)&&l4 - (char *)&&l3) + ((char *)&&l6 - (char *)&&l5); void *b[] = { &&l1, &&l2, &&l3, &&l4, &&l5, &&l6 }; l1: ++v; l2: ++v; l3: ++v; l4: ++v; l5: ++v; l6: ++v; if (x >= 0 && x <= 5) { x += 42; goto *b[x - 42]; } return a; } That is even older. r0-79351-g7771bb621aad43c7d0e21ccec4922dd3beac9cb6 still used to reject that: error: initializer element is not computable at load time r0-79390-g7ffb5e78794b6d8f8094d7c928e6f0e94b62cad6 already accepts but assembler doesn't handle that: pr112499-2.s:58: Error: invalid operands (*ABS* and .text sections) for `-' pr112499-2.s:58: Error: invalid operands (*ABS* and .text sections) for `-' pr112499-2.s:58: Error: invalid operands (.text and .text sections) for `+' .quad .L3-.L6-.L4-.L2+.L7+.L5 Guess we can only accept a subtraction of 2 labels, not addition of 2 labels or something more complex.