Testing canaries

Dear Duncan,

thank you very much. I have been able to use it now, via the following command line:

clang -emit-llvm -c -fstack-protector canary.c -o canary.bc
llc -print-before=stack-protector -print-after=stack-protector -o canary.s < canary.bc

Thank you again,

Izabela Maffra.