s390_fix_long_loop_prediction is used in machine dependent
reorg. There we use single_set to distingiush between conditional
jumps and branch on count patterns. However, single_set returns a
non-NULL value also for PARALLELs in case one of the SETs is dead.
2020-06-17 Andreas Krebbel <krebbel@linux.ibm.com>
gcc/
* config/s390/s390.c (s390_fix_long_loop_prediction): Exit early
for PARALLELs.
gcc/testsuite/
* gcc.target/s390/20200617.c: New test.
914eadfe86