On Fri, Dec 19, 2025 at 04:33:04PM +0100, Tobias Burnus wrote:
> Vladimir Makarov wrote:
> > So the patch has sense. You can commit it into the trunk. Thank you
> > for the patch, Alex.
>
> This patch unfortunately breaks GCN bootstrap,
> cf. https://gcc.gnu.org/PR123223
>
> > > for gcc/ChangeLog
> > >
> > > PR target/55212
> > > * lra-constraints.cc (match_reload): Treat former scratch
> > > regs as implicit unused output reloads.
> > > (process_alt_operands): Likewise.
> > > (curr_insn_transform): Likewise.
x86_64 and i686-linux bootstrap as well, all with
--enable-checking=yes,rtl,extra
REGNO is used multiple times in the patch without making sure
it is applied on REG_P only.
E.g. when building
bid128_fma.o
bid64_div.o
bid_binarydecimal.o
_divhc3.o
divtf3.o
emutls.o
floatbitinttd.o
_gcov_execle.o
_gcov_execl.o
_gcov_execlp.o
_gcov_info_to_gcda.o
generic-morestack.o
_mulhc3.o
unwind-dw2-fde-dip.o
unwind-dw2.o
in libgcc but probably pretty much anything larger.
Jakub
