[llvm-dev] Why doesn't this loop get removed?

[Riyaz Puthiyapurayil via llvm-dev]

int f() {
    int A[100];
    for (int i = 0; i < 100; ++i)
        A[i] = i;
    return A[10];
}

Neither gcc nor clang eliminates the loop. Clang also blows up the code a bit by unrolling the loop. Why can't this loop and the array be eliminated and the function body turned into ret i32 10 ? Am I missing something?

/Riyaz



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