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Hi Gabriel, I suggest you don't bother with testcases like this that are doing undefined things. For example, neither i nor k are initialized, so the result of accessing the array is undefined. Thus the frontend can (and apparently does) produce anything strange thing it does. What is more, the result aux is unused, so there is no obligation to compute it correctly. I think you will get

Dear All, As of late I am having a hard time getting my head around how array accesses are translated by Clang into LLVM IR: the often misunderstood GEP instruction. I am trying to reverse-engineer array accesses to discover the number of dimensions and actual indexes of the original, and I am beginning to wonder whether this is possible at all. To illustrate (some of) my troubles, consider