[Bug tree-optimization/61917] [4.9 Regression] ICE on valid code at -O3 on x86_64-linux-gnu in vectorizable_reduction, at tree-vect-loop.c:4913

[ktietz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61917

--- Comment #17 from Kai Tietz <ktietz at gcc dot gnu.org> ---
Just posted a fix.  For the 4.9 branch I could finally reproduce this error. 
It is caused by the PHI-check for a vector-constant, which obviously has no
valid statment ...