[Bug c++/58005] New: missed optimization printf constant string

[dushistov at mail dot ru]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58005

            Bug ID: 58005
           Summary: missed optimization printf constant string
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dushistov at mail dot ru

Simple code:

#include <cstdio>

int main()
{
    printf("%s: test1\n", __PRETTY_FUNCTION__);//1
    printf("test2\n");//2
    return 0;
}

compiled to:

callq  4005a0 <__printf_chk@plt> (1)
and to
callq  400590 <puts@plt> for (2)

I think that, because of __PRETTY_FUNCTION__ is known during compile time, it
is also possible converting (1) to "puts" call.

This optimization can help speedup loging functionality.