[Bug sanitizer/63520] ICE: in get_biv_step, at loop-iv.c:824 with -fsanitize=undefined on ppc64

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63520

--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
I gave the patch a quick try. Unfortunately I get stack overflows in stage2.

../../gcc/gcc/coverage.c:208:1: internal compiler error: Segmentation fault
 read_counts_file (void)
 ^
xg++: internal compiler error: Segmentation fault (program cc1plus)
0x100079e7 execute
        ../../gcc/gcc/gcc.c:2912
0x1000dc23 do_spec_1
        ../../gcc/gcc/gcc.c:4837
0x10012503 process_brace_body
        ../../gcc/gcc/gcc.c:6120
0x10012203 handle_braces
        ../../gcc/gcc/gcc.c:6034
0x100105d3 do_spec_1
        ../../gcc/gcc/gcc.c:5491
0x10012503 process_brace_body
        ../../gcc/gcc/gcc.c:6120
0x10012203 handle_braces
        ../../gcc/gcc/gcc.c:6034
0x100105d3 do_spec_1
        ../../gcc/gcc/gcc.c:5491
0x10010b0b do_spec_1
        ../../gcc/gcc/gcc.c:5606
0x10012503 process_brace_body
        ../../gcc/gcc/gcc.c:6120
0x10012203 handle_braces
        ../../gcc/gcc/gcc.c:6034
0x100105d3 do_spec_1
        ../../gcc/gcc/gcc.c:5491
0x10012503 process_brace_body
        ../../gcc/gcc/gcc.c:6120
0x10012203 handle_braces
        ../../gcc/gcc/gcc.c:6034
0x100105d3 do_spec_1
        ../../gcc/gcc/gcc.c:5491
0x10012503 process_brace_body
        ../../gcc/gcc/gcc.c:6120
0x10012203 handle_braces
        ../../gcc/gcc/gcc.c:6034
0x100105d3 do_spec_1
        ../../gcc/gcc/gcc.c:5491
0x10012503 process_brace_body
        ../../gcc/gcc/gcc.c:6120
0x10012203 handle_braces
        ../../gcc/gcc/gcc.c:6034
Please submit a full bug report,

This might be related to PR63289.