| commit | 914eadfe86a0400e0e378819001c785ecb30aab2 | |
| author | Andreas Krebbel <krebbel@linux.ibm.com> | |
| Wed, 17 Jun 2020 15:10:05 +0000 (17 17:10 +0200) | ||
| committer | Andreas Krebbel <krebbel@linux.ibm.com> | |
| Wed, 17 Jun 2020 15:11:45 +0000 (17 17:11 +0200) | ||
| tree | 79fdaf5aa7f9707f45b2a0b329480319ffcb4bdb | treesnapshot (tar.gz zip) |
| parent | 8a9e230f41eb406380ab0d9c2b73031133d54259 | commitdiff |
IBM Z: Prevent mach optimization on doloop patterns
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.
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.
| gcc/config/s390/s390.c | diffblobblamehistory | |
| gcc/testsuite/gcc.target/s390/20200617.c | [new file with mode: 0644] | blob |