[Bug target/89775] [7/8/9 Regression] S/390: Stackpointer save/restore instructions optimized away
krebbel at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Wed Mar 20 15:29:00 GMT 2019
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89775
--- Comment #2 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Wed Mar 20 15:28:38 2019
New Revision: 269823
URL: https://gcc.gnu.org/viewcvs?rev=269823&root=gcc&view=rev
Log:
S/390: Fix PR89775. Stackpointer save/restore instructions removed
Even if a global register is being clobbered in a function we usually
do not save and restore it. However, we still have to do this if it is
a special register. Most of the places in the backend handle this
correctly but not the prologue/epilogue optimization.
gcc/ChangeLog:
2019-03-20 Andreas Krebbel <krebbel@linux.ibm.com>
PR target/89775
* config/s390/s390.c (global_not_special_regno_p): Move to make it
available to ...
(s390_optimize_register_info): Use global_not_special_regno_p to
check for global regs.
2019-03-20 Jakub Jelinek <jakub@redhat.com>
PR target/89775
* gcc.target/s390/pr89775-1.c: New test.
* gcc.target/s390/pr89775-2.c: New test.
Added:
trunk/gcc/testsuite/gcc.target/s390/pr89775-1.c
trunk/gcc/testsuite/gcc.target/s390/pr89775-2.c
Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/s390/s390.c
trunk/gcc/testsuite/ChangeLog
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