https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123741
Bug ID: 123741
Summary: [16 regression] ice during GIMPLE pass: slp with
-Ofast and -march=znver3
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: middle-end
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
Created attachment 63439
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=63439&action=edit
f90 source code
>From the Fujitsu Fortran test suite at
https://github.com/fujitsu/compiler-test-suite
source code file trunk/Fortran/0008/0008_0061.f90
does this with recent gcc trunk:
fujitsu $ ~/gcc/results/bin/gfortran -c -w -O3 trunk/Fortran/0008/0008_0061.f90
fujitsu $ ~/gcc/results/bin/gfortran -c -w -Ofast
trunk/Fortran/0008/0008_0061.f90
fujitsu $ ~/gcc/results/bin/gfortran -c -w -Ofast -march=znver3
trunk/Fortran/0008/0008_0061.f90
during GIMPLE pass: slp
trunk/Fortran/0008/0008_0061.f90:15:1:
15 | subroutine s2(i,nn2,nn4)
| ^~~~~~~~~~~~~
internal compiler error: Segmentation fault
0x1fc2797 internal_error
/home/dcb42/gcc/working/gcc/../../trunk/gcc/diagnostic-global-context.cc:787
0xccb799 ???
/home/dcb42/gcc/working/gcc/../../trunk/gcc/toplev.cc:325
0xfaf15e vectorizable_store
/home/dcb42/gcc/working/gcc/../../trunk/gcc/tree-vect-stmts.cc:8698
0xfb58e2 vect_transform_stmt
/home/dcb42/gcc/working/gcc/../../trunk/gcc/tree-vect-stmts.cc:13364
0x1023c0e vect_schedule_slp_node
/home/dcb42/gcc/working/gcc/../../trunk/gcc/tree-vect-slp.cc:12098
0x101165f vect_schedule_scc
/home/dcb42/gcc/working/gcc/../../trunk/gcc/tree-vect-slp.cc:12347
gfortran 15.2.0 seems to work:
fujitsu $ ~/gcc/results.15.2.0/bin/gfortran -c -w -Ofast -march=znver3
trunk/Fortran/0008/0008_0061.f90
fujitsu $
The earliest gfortran 16 compiler I have is from 20251222:
ujitsu $ ~/gcc/results.20251222.asan.ubsan/bin/gfortran -c -w -Ofast
-march=znver3 trunk/Fortran/0008/0008_0061.f90
during GIMPLE pass: slp
trunk/Fortran/0008/0008_0061.f90:15:1:
15 | subroutine s2(i,nn2,nn4)
| ^~~~~~~~~~~~~
internal compiler error: Segmentation fault
0x21f1ee7 internal_error(char const*, ...)
../../trunk/gcc/diagnostic-global-context.cc:787
0xca7637 crash_signal
../../trunk/gcc/toplev.cc:325
0xfed5d5 vectorizable_store
../../trunk/gcc/tree-vect-stmts.cc:8658
The git hash on that is g:94010a2af914ade3
