mirror of git://gcc.gnu.org/git/gcc.git
56 lines
1.2 KiB
C
56 lines
1.2 KiB
C
/* Verify that memchr calls with the address of a constant character
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are folded as expected even at -O0.
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{ dg-do compile }
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{ dg-options "-O0 -Wall -fdump-tree-gimple" } */
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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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const char nul = 0;
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const char cha = 'a';
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const struct
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{
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char c;
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} snul = { 0 },
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schb = { 'b' },
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sarr[] = {
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{ 0 },
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{ 'c' }
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};
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void test_memchr_cst_char (void)
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{
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A (&nul == memchr (&nul, 0, 1));
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A (!memchr (&nul, 'a', 1));
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A (&cha == memchr (&cha, 'a', 1));
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A (!memchr (&cha, 0, 1));
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A (&snul.c == memchr (&snul.c, 0, 1));
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A (!memchr (&snul.c, 'a', 1));
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A (&schb.c == memchr (&schb.c, 'b', 1));
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A (!memchr (&schb.c, 0, 1));
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A (&sarr[0].c == memchr (&sarr[0].c, 0, 1));
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A (!memchr (&sarr[0].c, 'a', 1));
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A (&sarr[1].c == memchr (&sarr[1].c, 'c', 1));
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A (!memchr (&sarr[1].c, 0, 1));
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}
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/* { dg-final { scan-tree-dump-not "abort" "gimple" } } */
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