[Bug tree-optimization/123002] [15 regression] WIDEN_MULT_EXPR are incorrectly vectorized since r15-3189-gd3e71b99194bff

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123002

--- Comment #8 from Sam James <sjames at gcc dot gnu.org> ---
so, on trunk (not rebuilt with your commit), e.g. --param vrp-cstload-limit=0
hits it again.