https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81657
Wilco <wilco at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |wilco at gcc dot gnu.org
--- Comment #5 from Wilco <wilco at gcc dot gnu.org> ---
Note there are other optimizations which can block a tailcall, for example:
void *f (void *p) { return __builtin_strchr (p, 0); }
f:
stp x19, x30, [sp, -16]!
mov x19, x0
bl strlen
add x0, x19, x0
ldp x19, x30, [sp], 16
ret
f:
pushq %rbx
movq %rdi, %rbx
call strlen
addq %rbx, %rax
popq %rbx
ret
So the question is whether a tailcall is ever better than using a faster
library call.
