https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100820
Bug ID: 100820 Summary: [12 regression] bootstrap hangs during stage2 on power 10 Product: gcc Version: 12.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: bootstrap Assignee: unassigned at gcc dot gnu.org Reporter: seurer at gcc dot gnu.org Target Milestone: --- g:a8764071f2eb6b4cdc9ecb788dfaa2b095b52598, r12-1020 Author: Aaron Sawdey <acsaw...@linux.ibm.com> Date: Tue Mar 2 18:06:37 2021 -0600 Fusion patterns for add-logical/logical-add This is causing a hang during stage2 of bootstrapping for trunk on power 10. I tried r12-1019 and it was fine. Here is one example that happens when configure is running: . . . checking for powerpc64le-unknown-linux-gnu-gfortran... /home/seurer/gcc/git/build/gcc-trunk-bootstrap/./gcc/gfortran -B/home/seurer/gcc/git/build/gcc-trunk-bootstrap/./gcc/ -B/home/seurer/gcc/git/install/gcc-trunk-bootstrap/powerpc64le-unknown-linux-gnu/bin/ -B/home/seurer/gcc/git/install/gcc-trunk-bootstrap/powerpc64le-unknown-linux-gnu/lib/ -isystem /home/seurer/gcc/git/install/gcc-trunk-bootstrap/powerpc64le-unknown-linux-gnu/include -isystem /home/seurer/gcc/git/install/gcc-trunk-bootstrap/powerpc64le-unknown-linux-gnu/sys-include -fno-checking checking whether we are using the GNU Fortran compiler... (and here it hangs) 3912958 pts/0 R+ 2:12 /home/seurer/gcc/git/build/gcc-trunk-bootstrap/./gcc/f951 conftest.F -ffixed-form -cpp=/tmp/cc5vO5dZ.f90 -quiet -iprefix /home/seurer/gcc/git/build/gcc-trunk-bootstrap/gcc/../lib/gcc/powerpc64le-unknown-linux-gnu/12.0.0/ -isystem /home/seurer/gcc/git/build/gcc-trunk-bootstrap/./gcc/include -isystem /home/seurer/gcc/git/build/gcc-trunk-bootstrap/./gcc/include-fixed -isystem /home/seurer/gcc/git/install/gcc-trunk-bootstrap/powerpc64le-unknown-linux-gnu/include -isystem /home/seurer/gcc/git/install/gcc-trunk-bootstrap/powerpc64le-unknown-linux-gnu/sys-include conftest.F -quiet -dumpbase conftest.F -dumpbase-ext .F -mcpu=power10 -fno-checking -fintrinsic-modules-path finclude -fpre-include=/usr/include/finclude/math-vector-fortran.h -o /tmp/cc6Kgdbr.s This should finish almost instantly but never does. seurer@ltcden2-lp1:~/gcc/git/build/gcc-trunk-bootstrap$ cat ./powerpc64le-unknown-linux-gnu/libgomp/conftest.F program main #ifndef __GNUC__ choke me #endif end