[Bug tree-optimization/84047] [6/7/8 Regression] missing -Warray-bounds on an out-of-bounds index into an array

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84047

--- Comment #6 from Martin Sebor <msebor at gcc dot gnu.org> ---
I posted a patch for a similar issue reported in bug 83776
(https://gcc.gnu.org/ml/gcc-patches/2018-01/msg02144.html).  It handles
MEM_REFs and diagnoses the test case in comment #0 (I must have missed that
when I opened this bug) but it doesn't handle the test case in comment #2.