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111
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1 /* { dg-do run { target { stdint_types } } } */
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2 /* { dg-options "-O2" } */
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3
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4 #include <stdint.h>
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5 #include <stdlib.h>
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6
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7 void __attribute__ ((noinline))
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8 foo (uint64_t state, uint32_t last)
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9 {
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10 if (state == last) abort ();
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11 }
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12
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13 /* This function may do a bad comparision by trying to
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14 use SUBREGS during the compare on machines where comparing
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15 two registers always compares the entire register regardless
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16 of mode. */
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17
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18 int __attribute__ ((noinline))
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19 compare (uint64_t state, uint32_t *last, uint8_t buf)
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20 {
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21 if (*last == ((state | buf) & 0xFFFFFFFF)) {
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22 foo (state, *last);
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23 return 0;
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24 }
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25 return 1;
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26 }
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27
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28 int
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29 main(int argc, char **argv) {
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30 uint64_t state = 0xF00000100U;
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31 uint32_t last = 0x101U;
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32 int ret = compare(state, &last, 0x01);
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33 if (ret != 0)
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34 abort ();
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35 exit (0);
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36 }
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