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GCC Tail Calls

Name: Anonymous 2012-03-14 9:56

Is GCC able to optimize tail calls through function pointers?

Name: Anonymous 2012-03-14 10:07

Yes. See http://dis.4chan.org/read/prog/1331109713/30

Name: Anonymous 2013-05-19 13:59

$ cat | gcc -xc - && ./a.out



typedef (*fp)();



u(fp x)

{

    return x(x);

}



main()

{

    return u(u);

}

Name: >>3 2013-05-19 14:01

Now add -O{s,2,3} and see the magic happening.