https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66815
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |marxin at gcc dot gnu.org
Keywords| |wrong-code
Summary|Segfault with -lto and |lto and libitm are not
|libitm |compatible, tm_clone_table
| |is not outputed in the
| |final binary
Component|lto |ipa
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Patrick Marlier from comment #1)
> Created attachment 35936 [details]
> reduced testcase
>
> The .tm_clone_table section is not generated with LTO enabled.
> $ gcc -fgnu-tm -O0 -flto -c -o pr66815.o pr66815.c
> $ readelf -S pr66815.o | grep tm_clone_table
>
> So crt cannot notify TM clones to libitm.
yes it does look like the table is lost. though your usage of readelf there
does not show that.
~/upstream-gcc/bin/gcc -fgnu-tm -O0 -flto -save-temps t.c -v
grep tm_clone_table a*.s
Should show that tm_clone_table in one of the .s files but does not.
Removing -flto we get:
a-t.s: .section .tm_clone_table,"aw"
