[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

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                 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.