31 lines
930 B
C
31 lines
930 B
C
/* PR tree-optimization/83508 - c-c++-common/Wrestrict.c fails since r255836
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Test to verify that only one of -Wrestrict and -Wstringop-overflow is
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issued for a problem where either would be appropriate.
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{ dg-do compile }
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{ dg-options "-O2 -Wrestrict -Wstringop-overflow" } */
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#define DIFF_MAX __PTRDIFF_MAX__
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typedef __PTRDIFF_TYPE__ ptrdiff_t;
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typedef __SIZE_TYPE__ size_t;
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void sink (void*);
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void f (ptrdiff_t i, size_t n)
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{
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if (i < DIFF_MAX - 2 || DIFF_MAX - 1 > i)
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i = DIFF_MAX - 2;
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if (n < 4 || 5 < n)
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n = 4;
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char a[8] = "012";
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/* The following could very well be diagnosed by -Wstringop-overflow
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instead but there's no way to verify that only one of the two
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warnings is issued and the choice of -Wrestrict simply reflects
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the fact that -Wrestrict runs before -Wstringop-overflow. */
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__builtin_strncpy (a + i, a, n); /* { dg-warning "\\\[-Wrestrict]" } */
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sink (a);
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}
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