127 lines
1.8 KiB
C
127 lines
1.8 KiB
C
/* PR tree-optimization/84468 - bogus -Wstringop-truncation despite
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assignment after conditional strncpy
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{ dg-do compile }
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{ dg-options "-O2 -Wstringop-truncation -g" } */
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extern char* strncpy (char*, const char*, __SIZE_TYPE__);
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char a[4];
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void f1 (char *s)
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{
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int i = 0;
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if (s[0] == '0')
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{
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i += 1;
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strncpy (a, s, sizeof a); /* { dg-bogus "\\\[-Wstringop-truncation]" } */
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}
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else
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i += 2;
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a[sizeof a - 1] = 0;
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}
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void f2 (char *s)
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{
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int i = 0;
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if (s[0] == '0')
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{
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i += 1;
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if (s[1] == '1')
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{
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i += 2;
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strncpy (a, s, sizeof a); /* { dg-bogus "\\\[-Wstringop-truncation]" } */
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}
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else
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i += 3;
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}
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else
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i += 4;
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a[sizeof a - 1] = 0;
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}
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void f3 (char *s)
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{
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int i = 0;
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if (s[0] == '0')
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{
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i += 1;
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if (s[1] == '1')
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{
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i += 2;
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if (s[2] == '2')
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strncpy (a, s, sizeof a); /* { dg-bogus "\\\[-Wstringop-truncation]" } */
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else
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i += 3;
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}
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else
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i += 4;
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}
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else
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i += 5;
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a[sizeof a - 1] = 0;
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}
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void f4 (char *s)
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{
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int i = 0;
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if (s[0] == '0')
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{
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i += 1;
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if (s[1] == '1')
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{
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i += 2;
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if (s[2] == '2')
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{
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i += 3;
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if (s[3] == '3')
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strncpy (a, s, sizeof a); /* { dg-bogus "\\\[-Wstringop-truncation]" } */
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else
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i += 4;
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}
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else
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i += 5;
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}
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else
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i += 6;
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}
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else
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i += 7;
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a[sizeof a - 1] = 0;
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}
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void f4_warn (char *s)
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{
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int i = 0;
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if (s[0] == '0')
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{
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i += 1;
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if (s[1] == '1')
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{
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i += 2;
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if (s[2] == '2')
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{
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i += 3;
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if (s[3] == '3')
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strncpy (a, s, sizeof a); /* { dg-warning "\\\[-Wstringop-truncation]" } */
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else
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i += 4;
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}
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else
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i += 5;
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}
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else
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i += 6;
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}
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else
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i += 7;
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}
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