[Bug lto/69655] [6 Regression] libgomp lto failures: segfault in cgraph_node::mark_force_output

[vries at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69655

--- Comment #2 from vries at gcc dot gnu.org ---
In addition, these also fail (hiding PR69607, which is triggered in the same
test-cases when undoing r232384):
...
FAIL: libgomp.oacc-fortran/atomic_capture-1.f90 -DACC_DEVICE_TYPE_nvidia=1
-DACC_MEM_SHARED=0 -foffload=nvptx-none  -O0  (internal compiler error)
FAIL: libgomp.oacc-fortran/atomic_capture-1.f90 -DACC_DEVICE_TYPE_nvidia=1
-DACC_MEM_SHARED=0 -foffload=nvptx-none  -O0  (test for excess errors)
FAIL: libgomp.oacc-fortran/atomic_capture-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable  -O0  (internal compiler error)
FAIL: libgomp.oacc-fortran/atomic_capture-1.f90 -DACC_DEVICE_TYPE_host=1
-DACC_MEM_SHARED=1 -foffload=disable  -O0  (test for excess errors)
...