Comment 8 for bug 1304754

Anton:

I've done some experiments with the peano.go test and confirmed that gccgo on ppc is correctly configured to not use f-split-stack. It turns out the peano.go can't pass without split stacks. On gccgo/ppc64 the program crashes at a stack depth of

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x3fffb7722220 (LWP 24713)]
0x0000000010004e0c in main.is_zero ()
(gdb) bt
#0 0x0000000010004e0c in main.is_zero ()
#1 0x00000000100051fc in main.count ()
#2 0x000000001000522c in main.count ()
...
#31380 0x000000001000522c in main.count ()
#31381 0x0000000010005854 in main.main ()

I think the peano example is just a straght 'fall off the stack' type error, it also generates a slightly different
ubuntu@winton-02:~/go/test$ ./a.out
Segmentation fault (core dumped)
ubuntu@winton-02:~/go/test$ dmesg | tail -n1
[501663.078093] a.out[25679]: bad frame in setup_rt_frame: 000000c20ffaf0e0 nip 0000000010004e0c lr 00000000100051fc