[LLVMbugs] [Bug 6415] clang miscompile with -static and -O2

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Wed Feb 24 13:20:05 PST 2010


http://llvm.org/bugs/show_bug.cgi?id=6415

Chris Lattner <clattner at apple.com> changed:

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

--- Comment #1 from Chris Lattner <clattner at apple.com> 2010-02-24 15:20:04 CST ---
I really have no idea about this one, however if you redefine a standard
function, you have to pass -fno-builtin.  The fact that GCC is doing different
things at different optimization levels is a good indicator that you're relying
on undefined behavior.  Clang doesn't currently support -fno-builtin but that
is tracked by another PR.

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