[Bug c++/54899] -fpredictive-commoning and -ftree-vectorize optimizations generate a nonsensical binary which segfaults

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54899

Zdenek Sojka <zsojka at seznam dot cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |zsojka at seznam dot cz

--- Comment #1 from Zdenek Sojka <zsojka at seznam dot cz> 2012-10-11 10:37:59 UTC ---
bug2.ii:57
    Thing thing(Vec<>(0.0, 1.0, 0.0), Vec<>(0.0, 1.0, 1.0));
bug2.ii:33
   inline VecBinaryExpr(const Vec<>& e1, const Vec<>& e2) : Exp1(e1), Exp2(e2)
{}
bug2.ii:31
   const Vec<>& Exp1;
   const Vec<>& Exp2;

References to temporaries are taken and stored. Life of temporaries ends after
the return from call to the contructor, thus (Exp1, Exp2) are referencing dead
objects.