https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103465
--- Comment #13 from Tomas Kalibera <tomas.kalibera at gmail dot com> ---
(In reply to Martin Liška from comment #12)
> > So, still, the reorder-stacks-and-partition optimization is not dropped by
> > target (though I am not claiming they should be dropped, I don't know,
> > that's only what I learned from your response to my original report).
>
> I see. Can you see the following note:
>
> "%<-freorder-blocks-and-partition%> does not work "
> "with exceptions on this architecture");
>
> w/ -freorder-blocks-and-partition option used?
Not with
x86_64-w64-mingw32-gcc -c -O3 -freorder-blocks-and-partition a.c
but I do (the variant for C) with the original example for this bug report
x86_64-w64-mingw32-gcc -c -O3 -freorder-blocks-and-partition uwi.c -Wall
uwi.c:3:9: note: '-freorder-blocks-and-partition' does not support unwind info
on this architecture
3 | #pragma GCC optimize ("unroll-loops")
| ^~~
uwi.c:5:1: note: '-freorder-blocks-and-partition' does not support unwind info
on this architecture
5 | int main(int argc, char **argv) {
| ^~~
this original example (uwi.c) has an GCC optimize pragma:
#include<stdio.h>
#pragma GCC optimize ("unroll-loops")
int main(int argc, char **argv) {
printf("Hello 1\n");
printf("Hello 2\n");
printf("Hello 3\n");
return 0;
}
For C++ I get the note with "does not work with exceptions on this
architecture"
