clang-tests/gcc-4_2-testsuite/src/gcc.dg/980526-1.c

/* { dg-do compile { target fpic } } */
/* { dg-options "-O2 -fpic" } */

int
test(void)
{
    double value, maxValue = - (__extension__	((union { unsigned __l __attribute__((__mode__(__DI__))); double __d; }) { __l: 0x7ff0000000000000ULL }).__d)  ; // {{ dg-warning "old-style field designator" }}
    int idx, maxIdx = 1;

    for (idx = 1; idx < 22; idx++) {
        if (value > maxValue) {
            maxValue = value;
            maxIdx = idx;
        }
    }
    return 0 ;
}