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111
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1 /* { dg-do compile } */
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2 /* { dg-options "-O2" } */
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3
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4 typedef __SIZE_TYPE__ size_t;
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5
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6 extern void warn_memset_zero_len (void)
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7 __attribute__((__warning__ ("memset used with constant zero length parameter;"
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8 " this could be due to transposed parameters")));
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9
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10 extern inline __attribute__((gnu_inline, always_inline, artificial)) void *
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11 memset (void *dest, int ch, size_t len)
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12 {
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13 if (__builtin_constant_p (len) && len == 0)
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14 {
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15 warn_memset_zero_len (); /* { dg-warning "memset used with constant zero" } */
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16 return dest;
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17 }
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18 return __builtin_memset (dest, ch, len);
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19 }
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20
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21 char buf[10];
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22
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23 int
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24 main (void)
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25 {
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26 memset (buf, sizeof (buf), 0);
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27 return 0;
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28 }
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