69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/* PR tree-optimization/86711 - wrong folding of memchr
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Verify that memchr() of arrays initialized with 16-bit wide string
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literals finds the nul only when it is present in the wide string.
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{ dg-do compile }
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{ dg-options "-O1 -Wall -fshort-wchar -fdump-tree-optimized" } */
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typedef __SIZE_TYPE__ size_t;
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typedef __WCHAR_TYPE__ wchar_t;
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extern void* memchr (const void*, int, size_t);
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extern int printf (const char*, ...);
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extern void abort (void);
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#define A(expr) \
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((expr) \
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? (void)0 \
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: (printf ("assertion failed on line %i: %s\n", \
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__LINE__, #expr), \
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abort ()))
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static const wchar_t wc = L'1';
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static const wchar_t ws1[] = L"1";
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static const wchar_t ws2[2] = L"\x1234\x5678"; /* no terminating nul */
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static const wchar_t ws4[] = L"\x0012\x1200\x1234";
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void test_wide (void)
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{
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int i0 = 0;
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int i1 = i0 + 1;
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int i2 = i1 + 1;
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A (sizeof (wchar_t) == 2);
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A (memchr (L"" + 1, 0, 0) == 0);
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A (memchr (&wc + 1, 0, 0) == 0);
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A (memchr (L"\x1234", 0, sizeof (wchar_t)) == 0);
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A (memchr (L"" + i1, i0, i0) == 0);
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A (memchr (&wc + i1, i0, i0) == 0);
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A (memchr (L"\x1234", i0, sizeof (wchar_t)) == 0);
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A (memchr (ws2, 0, sizeof ws2) == 0);
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A (memchr (ws2, i0, sizeof ws2) == 0);
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const size_t nb = sizeof ws4;
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const size_t nwb = sizeof (wchar_t);
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const char *pws1 = (const char*)ws1;
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const char *pws4 = (const char*)ws4;
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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A (memchr (ws1, i0, sizeof ws1) == pws1 + 1);
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A (memchr (&ws4[0], i0, nb) == pws4 + i1);
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A (memchr (&ws4[1], i0, nb - i1 * nwb) == pws4 + i1 * nwb);
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A (memchr (&ws4[2], i0, nb - i2 * nwb) == pws4 + i2 * nwb + i2);
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#else
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A (memchr (ws1, i0, sizeof ws1) == pws1 + 0);
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A (memchr (&ws4[0], i0, nb) == pws4 + 0);
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A (memchr (&ws4[1], i0, nb - i1 * nwb) == pws4 + i1 * nwb + i1);
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A (memchr (&ws4[2], i0, nb - i2 * nwb) == pws4 + i2 * nwb + i2);
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#endif
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}
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/* { dg-final { scan-tree-dump-not "abort" "optimized" } } */
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