[Bug target/84332] ICE in insn_default_length, at config/s390/s390.md:9697 for -fstack-clash-protection

["krebbel at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84332

--- Comment #3 from Andreas Krebbel <krebbel at gcc dot gnu.org> ---
Author: krebbel
Date: Thu Aug  9 07:06:23 2018
New Revision: 263441

URL: https://gcc.gnu.org/viewcvs?rev=263441&root=gcc&view=rev
Log:
S/390: Fix PR84332 ICE with stack clash protection

Our implementation of the stack probe requires the probe interval to
be used as displacement in an address operand.  The maximum probe
interval currently is 64k.  This would exceed short displacements.
Trim that value down to 4k if that happens.  This might result in too
many probes being generated only on the oldest supported machine level
z900.

gcc/ChangeLog:

2018-08-09  Andreas Krebbel  <krebbel@linux.ibm.com>

        PR target/84332
        * config/s390/s390.c (s390_option_override_internal): Reduce the
        stack-clash-protection-probe-interval param if it would be too big
        for z900.

gcc/testsuite/ChangeLog:

2018-08-09  Andreas Krebbel  <krebbel@linux.ibm.com>

        PR target/84332
        * gcc.target/s390/pr84332.c: New testcase.


Added:
    trunk/gcc/testsuite/gcc.target/s390/pr84332.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/s390/s390.c
    trunk/gcc/testsuite/ChangeLog