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// clang -gdwarf-5 -O2 -nostdlib __attribute__((noinline, cold)) static int sum(int i) { int j, s; s = 0; for (j = 0; j < i; j++) { s += j * i; } return s; } int main(int argc, char** argv) { if (argc == 0) { return 0; } return sum(argc); }