https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92874
Bug ID: 92874
Summary: ICE in gfc_dep_compare_expr, at
fortran/dependency.c:36
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: fortran
Assignee: unassigned at gcc dot gnu.org
Reporter: gs...@t-online.de
Target Milestone: ---
Affects versions down to at least gfortran-4.9,
compiles and works with -fno-frontend-optimize :
$ cat z1.f90
program p
call s('a')
call s('abc')
end
subroutine s(x)
character(*) :: x
print *, (x(1:1) == x(1:))
end
$ gfortran-10-20191208 z1.f90 -O2 -fno-frontend-optimize && ./a.out
T
F
$ gfortran-10-20191208 -c z1.f90 -O2
f951: internal compiler error: Segmentation fault
0xb800af crash_signal
../../gcc/toplev.c:328
0x6c9b14 gfc_dep_compare_expr(gfc_expr*, gfc_expr*)
../../gcc/fortran/dependency.c:368
0x6ca0ea are_identical_variables
../../gcc/fortran/dependency.c:187
0x6ca0ea gfc_dep_compare_expr(gfc_expr*, gfc_expr*)
../../gcc/fortran/dependency.c:486
0x758249 optimize_comparison
../../gcc/fortran/frontend-passes.c:2077
0x759a2f optimize_op
../../gcc/fortran/frontend-passes.c:1914
0x759a2f optimize_expr
../../gcc/fortran/frontend-passes.c:352
0x75a205 gfc_expr_walker(gfc_expr**, int (*)(gfc_expr**, int*, void*), void*)
../../gcc/fortran/frontend-passes.c:4929
0x75a3e9 gfc_expr_walker(gfc_expr**, int (*)(gfc_expr**, int*, void*), void*)
../../gcc/fortran/frontend-passes.c:4936
0x75cab1 gfc_code_walker(gfc_code**, int (*)(gfc_code**, int*, void*), int
(*)(gfc_expr**, int*, void*), void*)
../../gcc/fortran/frontend-passes.c:5347
0x75cb47 gfc_code_walker(gfc_code**, int (*)(gfc_code**, int*, void*), int
(*)(gfc_expr**, int*, void*), void*)
../../gcc/fortran/frontend-passes.c:5355
0x75dd12 optimize_namespace
../../gcc/fortran/frontend-passes.c:1474
0x75e15f gfc_run_passes(gfc_namespace*)
../../gcc/fortran/frontend-passes.c:165
0x69a1c7 gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.c:17227
0x69a591 gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.c:2546
0x69a591 resolve_global_procedure
../../gcc/fortran/resolve.c:2548
0x6a3378 resolve_call
../../gcc/fortran/resolve.c:3676
0x697d7d gfc_resolve_code(gfc_code*, gfc_namespace*)
../../gcc/fortran/resolve.c:11878
0x69a0d7 resolve_codes
../../gcc/fortran/resolve.c:17186
0x69a19e gfc_resolve(gfc_namespace*)
../../gcc/fortran/resolve.c:17221
