https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103465
Martin Liška <marxin at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |WAITING
--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
Let's speak about the current master:
> With "12.0" (5e5f880d0452ef2cffb94f4a686d56833c9f4215), the note is not
> emitted with -fno-reorder-blocks-and-partition, however, the other problem
> remains. The note is still not emitted when the optimization is enabled
> implicitly via -O2.
I see:
/xgcc -B. /home/marxin/Programming/testcases/pr103465.c -c -O2
-freorder-blocks-and-partition
/home/marxin/Programming/testcases/pr103465.c:2:9: note:
‘-freorder-blocks-and-partition’ does not support unwind info on this
architecture
2 | #pragma GCC optimize ("unroll-loops")
| ^~~
/home/marxin/Programming/testcases/pr103465.c:4:1: note:
‘-freorder-blocks-and-partition’ does not support unwind info on this
architecture
4 | int main(int argc, char **argv) {
| ^~~
which seems correct to me. With only -O2 there's no note emitted and the flags
are properly dropped (same in -freorder-blocks-and-partition):
$ cat -n gcc/opts.c
...
1133 if (opts->x_flag_unwind_tables
1134 && !targetm_common.unwind_tables_default
1135 && opts->x_flag_reorder_blocks_and_partition
1136 && (ui_except == UI_SJLJ || ui_except >= UI_TARGET))
1137 {
1138 if (opts_set->x_flag_reorder_blocks_and_partition)
1139 inform (loc,
1140 "%<-freorder-blocks-and-partition%> does not support "
1141 "unwind info on this architecture");
1142 opts->x_flag_reorder_blocks_and_partition = 0;
1143 opts->x_flag_reorder_blocks = 1;
1144 }
So what's wrong with that, please?
