File: pr56868.cpp

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gcc-arm-none-eabi 15%3A7-2018-q2-5
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// { dg-do compile { target c++11 } }

constexpr int f(void *) { return 0; }
constexpr int f(...) { return 1; }
constexpr int g1() { return f(0); }
constexpr int g2(int n) { return f(n); }
constexpr int g3(int n) { return f(n*0); }

int main()
{
    static_assert(g1() == 0, "g1 failed");
    static_assert(g2(0) == 1, "g2 failed");
    static_assert(g3(0) == 1, "g3 failed");
}