[Bug c/4210] should not warning with dead code

[pinskia@physics.uc.edu]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=4210


pinskia@physics.uc.edu changed:

           What    |Removed                     |Added
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           Severity|normal                      |enhancement
            Summary|bad warning with dead code  |should not warning with dead
                   |                            |code