[Bug tree-optimization/66828] [5/6 Regression] gcc/tree-ssa-math-opts.c:2182:38: runtime error: left shift of 72057594037927936 by 8 places cannot be represented in type 'long int'

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66828

--- Comment #10 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
Thomas, could you backport your fix to the gcc-5 branch, so that we can close
this issue?