178 lines
5.2 KiB
C
178 lines
5.2 KiB
C
/* PR tree-optimization/92683 - strncmp incorrect result with equal substrings
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and nonconst bound
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{ dg-do compile }
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{ dg-options "-O1 -Wall -fdump-tree-forwprop1" } */
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#define SIZE_MAX __SIZE_MAX__
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#define S123 "123"
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#define S1234 "1234"
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typedef __SIZE_TYPE__ size_t;
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#ifndef ident
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# define ident(n) n
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#endif
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extern void failure_on_line (int);
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/* Verify that the test in 'if (EQL strncmp (S, T, N))' is folded. */
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#define T(eql, s, t, n) do { \
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max = ident (n); \
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if (!(eql __builtin_strncmp (s, t, max))) \
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failure_on_line (__LINE__); \
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} while (0)
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void test_literal (void)
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{
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size_t max;
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T (0 ==, S123, S1234, 0);
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T (0 ==, S123, S1234, 1);
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T (0 ==, S123, S1234, 2);
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T (0 ==, S123, S1234, 3);
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T (0 >, S123, S1234, 4);
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T (0 >, S123, S1234, 5);
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T (0 >, S123, S1234, SIZE_MAX - 2);
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T (0 >, S123, S1234, SIZE_MAX - 1);
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T (0 >, S123, S1234, SIZE_MAX);
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T (0 ==, S123 + 1, S1234, 0);
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T (0 <, S123 + 1, S1234, 1);
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T (0 <, S123 + 1, S1234, 2);
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T (0 <, S123 + 1, S1234, 3);
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T (0 <, S123 + 1, S1234, 4);
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T (0 <, S123 + 1, S1234, SIZE_MAX - 2);
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T (0 <, S123 + 1, S1234, SIZE_MAX - 1);
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T (0 <, S123 + 1, S1234, SIZE_MAX);
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T (0 ==, S123 + 1, S1234 + 1, 0);
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T (0 ==, S123 + 1, S1234 + 1, 1);
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T (0 ==, S123 + 1, S1234 + 1, 2);
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T (0 >, S123 + 1, S1234 + 1, 3);
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T (0 >, S123 + 1, S1234 + 1, SIZE_MAX - 1);
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T (0 >, S123 + 1, S1234 + 1, SIZE_MAX);
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T (0 ==, S123 + 3, S1234 + 1, 0);
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T (0 >, S123 + 3, S1234 + 1, 1);
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T (0 >, S123 + 3, S1234 + 1, 2);
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T (0 >, S123 + 3, S1234 + 1, 3);
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T (0 >, S123 + 3, S1234 + 1, SIZE_MAX - 1);
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T (0 >, S123 + 3, S1234 + 1, SIZE_MAX);
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int zero = 0;
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T (zero ==, S123, S1234, 0);
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T (zero ==, S123, S1234, 1);
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T (zero ==, S123, S1234, 2);
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T (zero ==, S123, S1234, 3);
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T (zero >, S123, S1234, 4);
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T (zero >, S123, S1234, 5);
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T (zero >, S123, S1234, SIZE_MAX - 2);
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T (zero >, S123, S1234, SIZE_MAX - 1);
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T (zero >, S123, S1234, SIZE_MAX);
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T (zero ==, S123 + 1, S1234, 0);
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T (zero <, S123 + 1, S1234, 1);
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T (zero <, S123 + 1, S1234, 2);
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T (zero <, S123 + 1, S1234, 3);
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T (zero <, S123 + 1, S1234, 4);
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T (zero <, S123 + 1, S1234, SIZE_MAX - 2);
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T (zero <, S123 + 1, S1234, SIZE_MAX - 1);
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T (zero <, S123 + 1, S1234, SIZE_MAX);
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T (zero ==, S123 + 1, S1234 + 1, 0);
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T (zero ==, S123 + 1, S1234 + 1, 1);
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T (zero ==, S123 + 1, S1234 + 1, 2);
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T (zero >, S123 + 1, S1234 + 1, 3);
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T (zero >, S123 + 1, S1234 + 1, SIZE_MAX - 1);
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T (zero >, S123 + 1, S1234 + 1, SIZE_MAX);
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T (zero ==, S123 + 3, S1234 + 1, 0);
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T (zero >, S123 + 3, S1234 + 1, 1);
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T (zero >, S123 + 3, S1234 + 1, 2);
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T (zero >, S123 + 3, S1234 + 1, 3);
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T (zero >, S123 + 3, S1234 + 1, SIZE_MAX - 1);
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T (zero >, S123 + 3, S1234 + 1, SIZE_MAX);
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}
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const char s123[] = S123;
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const char s1234[] = S1234;
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void test_cst_array (void)
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{
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size_t max;
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T (0 ==, s123, s1234, 0);
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T (0 ==, s123, s1234, 1);
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T (0 ==, s123, s1234, 2);
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T (0 ==, s123, s1234, 3);
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T (0 >, s123, s1234, 4);
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T (0 >, s123, s1234, 5);
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T (0 >, s123, s1234, SIZE_MAX - 2);
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T (0 >, s123, s1234, SIZE_MAX - 1);
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T (0 >, s123, s1234, SIZE_MAX);
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T (0 ==, s123 + 1, s1234, 0);
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T (0 <, s123 + 1, s1234, 1);
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T (0 <, s123 + 1, s1234, 2);
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T (0 <, s123 + 1, s1234, 3);
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T (0 <, s123 + 1, s1234, 4);
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T (0 <, s123 + 1, s1234, SIZE_MAX - 2);
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T (0 <, s123 + 1, s1234, SIZE_MAX - 1);
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T (0 <, s123 + 1, s1234, SIZE_MAX);
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T (0 ==, s123 + 1, s1234 + 1, 0);
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T (0 ==, s123 + 1, s1234 + 1, 1);
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T (0 ==, s123 + 1, s1234 + 1, 2);
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T (0 >, s123 + 1, s1234 + 1, 3);
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T (0 >, s123 + 1, s1234 + 1, SIZE_MAX - 1);
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T (0 >, s123 + 1, s1234 + 1, SIZE_MAX);
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T (0 ==, s123 + 3, s1234 + 1, 0);
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T (0 >, s123 + 3, s1234 + 1, 1);
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T (0 >, s123 + 3, s1234 + 1, 2);
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T (0 >, s123 + 3, s1234 + 1, 3);
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T (0 >, s123 + 3, s1234 + 1, SIZE_MAX - 1);
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T (0 >, s123 + 3, s1234 + 1, SIZE_MAX);
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int zero = 0;
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T (zero ==, s123, s1234, 0);
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T (zero ==, s123, s1234, 1);
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T (zero ==, s123, s1234, 2);
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T (zero ==, s123, s1234, 3);
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T (zero >, s123, s1234, 4);
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T (zero >, s123, s1234, 5);
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T (zero >, s123, s1234, SIZE_MAX - 2);
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T (zero >, s123, s1234, SIZE_MAX - 1);
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T (zero >, s123, s1234, SIZE_MAX);
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T (zero ==, s123 + 1, s1234, 0);
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T (zero <, s123 + 1, s1234, 1);
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T (zero <, s123 + 1, s1234, 2);
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T (zero <, s123 + 1, s1234, 3);
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T (zero <, s123 + 1, s1234, 4);
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T (zero <, s123 + 1, s1234, SIZE_MAX - 2);
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T (zero <, s123 + 1, s1234, SIZE_MAX - 1);
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T (zero <, s123 + 1, s1234, SIZE_MAX);
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T (zero ==, s123 + 1, s1234 + 1, 0);
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T (zero ==, s123 + 1, s1234 + 1, 1);
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T (zero ==, s123 + 1, s1234 + 1, 2);
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T (zero >, s123 + 1, s1234 + 1, 3);
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T (zero >, s123 + 1, s1234 + 1, SIZE_MAX - 1);
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T (zero >, s123 + 1, s1234 + 1, SIZE_MAX);
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T (zero ==, s123 + 3, s1234 + 1, 0);
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T (zero >, s123 + 3, s1234 + 1, 1);
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T (zero >, s123 + 3, s1234 + 1, 2);
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T (zero >, s123 + 3, s1234 + 1, 3);
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T (zero >, s123 + 3, s1234 + 1, SIZE_MAX - 1);
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T (zero >, s123 + 3, s1234 + 1, SIZE_MAX);
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}
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/* { dg-final { scan-tree-dump-not "strcmp" "forwprop1" } }
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{ dg-final { scan-tree-dump-not "strncmp" "forwprop1" } }
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{ dg-final { scan-tree-dump-not "failure_on_line_" "forwprop1" } } */
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