[LLVMdev] Transition C->bitcode->assembly->object looses frame pointers

[Duncan Sands]

Hi Alexander, I took a look at how backtrace works and it doesn't use
the frame pointer at all, instead it uses dwarf unwind tables.  So to
make it work using llc you need to do as follows:

$ llc -unwind-tables bt.ll -o bt.S
$ gcc -o bt-llc bt.S
$ ./bt-llc 4
backtrace() returned 4 addresses
./bt-llc() [0x4007aa]
./bt-llc() [0x400856]
./bt-llc() [0x40087c]
./bt-llc() [0x400875]

Ciao, Duncan.