On Mon, Dec 8, 2025 at 9:00 PM Haochen Jiang <[email protected]> wrote: > > On Linux/x86_64, > > fae0c626250563c1619cc10c6af18a0c4cae5a97 is the first bad commit > commit fae0c626250563c1619cc10c6af18a0c4cae5a97 > Author: Andrew Pinski <[email protected]> > Date: Sat Dec 6 01:11:29 2025 -0800 > > final_cleanup: Call make_forwarders_with_degenerate_phis [PR46555] > > caused > > FAIL: gcc.target/i386/pr90178.c scan-assembler-times xorl[\\t ]*\\%eax,[\\t > ]*%eax 1 > > with GCC configured with > > ../../gcc/configure > --prefix=/export/users3/haochenj/src/gcc-bisect/master/master/r16-5975/usr > --enable-clocale=gnu --with-system-zlib --with-demangler-in-ld > --with-fpmath=sse --enable-languages=c,c++,fortran --enable-cet --without-isl > --enable-libmpx x86_64-linux --disable-bootstrap > > To reproduce: > > $ cd {build_dir}/gcc && make check > RUNTESTFLAGS="i386.exp=gcc.target/i386/pr90178.c --target_board='unix{-m32}'" > $ cd {build_dir}/gcc && make check > RUNTESTFLAGS="i386.exp=gcc.target/i386/pr90178.c --target_board='unix{-m32\ > -march=cascadelake}'"
I filed https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123070 for the failure but it looks like a RA issue of not allocating r101 to the return register (EAX). I can't figure out why though. Thanks, Andrew > > (Please directly reply to this email for question about this report.) > (If you met problems with cascadelake related, disabling AVX512F in command > line might save that.) > (However, please make sure that there is no potential problems with AVX512.)
