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1 /* PR tree-optimization/92226 - live nul char store to array eliminated
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2 Test to verify warnings are issued for overflow detected thanks to
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3 the enhancement committed on top of the fix for PR 92226.
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4 { dg-do compile }
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5 { dg-options "-O2 -Wall -Wno-array-bounds -ftrack-macro-expansion=0" } */
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6
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7 #include "strlenopt.h"
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8
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9 #define NOIPA __attribute__ ((noipa))
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10
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11 #define T(MIN, MAX, SIZE, IDX) \
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12 NOIPA void \
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13 test_ ## MIN ## _ ## MAX ## _ ## SIZE ## _ ## IDX (const char *s) \
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14 { \
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15 size_t len = strlen (s); \
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16 if (MIN <= len && len <= MAX) \
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17 { \
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18 extern char d[]; \
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19 strcpy (d, s); \
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20 d[IDX] = 0; \
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21 extern char a ## SIZE[SIZE]; \
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22 strcpy (a ## SIZE, d); \
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23 } \
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24 } typedef void dummy_type
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25
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26
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27 T (2, 2, 1, 0);
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28 T (2, 2, 1, 1); // { dg-warning "writing 2 bytes into a region of size 1" }
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29 T (2, 2, 1, 2); // { dg-warning "writing 3 bytes into a region of size 1" }
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30
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31 T (2, 3, 1, 0);
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32 T (2, 3, 1, 1); // { dg-warning "writing 2 bytes into a region of size 1" }
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33 T (2, 3, 1, 2); // { dg-warning "writing 3 bytes into a region of size 1" "" { xfail *-*-*} }
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34 T (2, 3, 1, 3); // { dg-warning "writing 4 bytes into a region of size 1" "" { xfail *-*-* } }
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35
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36 T (5, 7, 3, 1);
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37 T (5, 7, 3, 2);
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38 T (5, 7, 3, 3); // { dg-warning "writing 4 bytes into a region of size 3" }
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39 T (5, 7, 3, 4); // { dg-warning "writing 5 bytes into a region of size 3" }
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40 T (5, 7, 3, 5); // { dg-warning "writing 6 bytes into a region of size 3" "" { xfail *-*-* } }
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