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Commit | Line | Data |
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3f9a497d MS |
1 | /* PR middle-end/94195 - missing warning reading a smaller object via |
2 | an lvalue of a larger type | |
3 | { dg-do compile } | |
28d3b78d TV |
4 | { dg-options "-O2 -Wall" } |
5 | { dg-require-effective-target alloca } */ | |
3f9a497d MS |
6 | |
7 | typedef __INT16_TYPE__ int16_t; | |
8 | typedef __SIZE_TYPE__ size_t; | |
9 | ||
10 | void* alloca (size_t); | |
11 | ||
12 | void sink (void*); | |
13 | ||
14 | ||
15 | void byte_store_to_decl (void) | |
16 | { | |
a1108556 | 17 | struct S6 { char a[6]; } s; // { dg-message "at offset 6 into object 's' of size 6" "note" } |
3f9a497d MS |
18 | |
19 | char *p = (char*)&s; | |
20 | ||
21 | p[0] = 0; p[1] = 1; p[2] = 2; p[3] = 3; p[4] = 4; p[5] = 5; | |
22 | p[6] = 6; // { dg-warning "array subscript 6 is outside array bounds of 'struct S6\\\[1]" } | |
23 | ||
24 | sink (&s); | |
25 | } | |
26 | ||
27 | ||
28 | void word_store_to_decl (void) | |
29 | { | |
a1108556 | 30 | struct S6 { char a[6]; } s; // { dg-message "at offset 5 into object 's' of size 6" "note" } |
3f9a497d MS |
31 | |
32 | char *p = (char*)&s; | |
33 | ||
34 | int16_t *q = (int16_t*)(p + 1); | |
35 | ||
36 | q[0] = 0; q[1] = 1; | |
37 | q[2] = 2; // { dg-warning "array subscript 'int16_t {aka short int}\\\[2]' is partly outside array bounds of 'struct S6\\\[1]'" } | |
38 | ||
39 | sink (&s); | |
40 | } | |
41 | ||
42 | ||
43 | void word_store_to_alloc (void) | |
44 | { | |
45 | struct S6 { char a[6]; } *p; | |
a1108556 | 46 | p = alloca (sizeof *p); // { dg-message "at offset 5 into object of size 6 allocated by 'alloca'" "note" } |
3f9a497d MS |
47 | |
48 | int16_t *q = (int16_t*)((char*)p + 1); | |
49 | ||
50 | q[0] = 0; q[1] = 1; | |
51 | q[2] = 2; // { dg-warning "array subscript 'int16_t {aka short int}\\\[2]' is partly outside array bounds of 'unsigned char\\\[6]'" } | |
52 | ||
53 | sink (p); | |
54 | } |