[Bug tree-optimization/66974] -Warray-bounds false positive with -O3

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66974
Bug 66974 depends on bug 83202, which changed state.

Bug 83202 Summary: Try joining operations on consecutive array elements during 
tree vectorization
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83202

           What    |Removed                     |Added
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             Status|ASSIGNED                    |RESOLVED
         Resolution|---                         |FIXED