https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80080
--- Comment #14 from Andreas Krebbel <krebbel at gcc dot gnu.org> --- Author: krebbel Date: Thu Sep 6 07:38:42 2018 New Revision: 264143 URL: https://gcc.gnu.org/viewcvs?rev=264143&root=gcc&view=rev Log: S/390: Prohibit SYMBOL_REF in UNSPECV_CAS Inhibit constant propagation inlining SYMBOL_REF loads into UNSPECV_CAS. Even though reload can later undo it, the resulting code will be less efficient. gcc/ChangeLog: 2018-09-06 Ilya Leoshkevich <i...@linux.ibm.com> PR target/80080 * config/s390/predicates.md: Add nonsym_memory_operand. * config/s390/s390.c (s390_legitimize_cs_operand): If operand contains a SYMBOL_REF, load it into an intermediate pseudo. (s390_emit_compare_and_swap): Legitimize operand. * config/s390/s390.md: Use the new nonsym_memory_operand with UNSPECV_CAS patterns. gcc/testsuite/ChangeLog: 2018-09-06 Ilya Leoshkevich <i...@linux.ibm.com> PR target/80080 * gcc.target/s390/pr80080-3.c: New test. * gcc.target/s390/s390.exp: Make sure the new test passes on all optimization levels. Added: trunk/gcc/testsuite/gcc.target/s390/pr80080-3.c Modified: trunk/gcc/ChangeLog trunk/gcc/config/s390/predicates.md trunk/gcc/config/s390/s390.c trunk/gcc/config/s390/s390.md trunk/gcc/testsuite/ChangeLog trunk/gcc/testsuite/gcc.target/s390/s390.exp
