[Bug tree-optimization/78725] [7 Regression] wrong code at -O3 on x86_64-linux-gnu (in both 32-bit and 64-bit modes)

[matz at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78725

--- Comment #4 from Michael Matz <matz at gcc dot gnu.org> ---
Thanks for the second testcase as well.  It's not quite the same miscompilation
(the induction vars don't overflow), but a related one (the value of d
considered in the conditional statement is the final one after the d-loop
finishes, not the value at the use itself).  Fixed with v2 of the patch,
at https://gcc.gnu.org/ml/gcc-patches/2016-12/msg01035.html .