[LLVMbugs] [Bug 5789] totally empty .o file generated with -fomit-frame-pointer

bugzilla-daemon at cs.uiuc.edu bugzilla-daemon at cs.uiuc.edu
Tue Dec 15 10:31:30 PST 2009


Chris Lattner <clattner at apple.com> changed:

           What    |Removed                     |Added
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #1 from Chris Lattner <clattner at apple.com>  2009-12-15 12:31:29 ---
The compiler is right.  You're loading through an undefined pointer, which is
undefined behavior.  It has realized that your function is not reachable, so it
deletes the body.  If you use '-emit-llvm -S' you'll see that it has an
'unreachable' instruction in the entry of the llvm ir.  The .s file probably
just has a label for the function.

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