https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61949
--- Comment #25 from ro at CeBiTec dot Uni-Bielefeld.DE <ro at CeBiTec dot
Uni-Bielefeld.DE> ---
> --- Comment #21 from Richard Biener <rguenth at gcc dot gnu.org> ---
> Ok, can reproduce but I need -msse2 in addition to -O2 (but executing ./cc1 so
> your diver may add that).
It does: config.gcc has
i[34567]86-*-solaris2* | x86_64-*-solaris2.1[0-9]*)
# Set default arch_32 to pentium4, tune_32 to generic like the other
# i386 targets, although config.guess defaults to i386-pc-solaris2*.
with_arch_32=${with_arch_32:-pentium4}
with_tune_32=${with_tune_32:-generic}
thus cc1 is called with -mtune=generic -march=pentium4.
Rainer
