https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99823
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2021-03-30
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
-funroll-all-loops applies to the RTL loop unroller, the GIMPLE level
concludes:
Estimating sizes for loop 1
BB: 3, after_exit: 0
size: 1 _1 = MEM[(int (*<T9564>) (int) &)__for_begin_21];
size: 5 _13 = _1 (s_20);
size: 1 __for_begin_14 = __for_begin_21 + 8;
size: 1 ivtmp_4 = ivtmp_11 - 1;
Induction variable computation will be folded away.
size: 2 if (ivtmp_4 != 0)
Exit condition will be eliminated in peeled copies.
Exit condition will be eliminated in last copy.
Constant conditional.
BB: 5, after_exit: 1
size: 10-3, last_iteration: 10-3
Loop size: 10
Estimated size after unrolling: 14
Not unrolling loop 1: contains call and code would grow.
so it concludes unrolling isn't profitable (but it would turn indirect into
direct calls).
