|
131
|
1 /* PR tree-optimization/83640 - ice in generic_overlap, at
|
|
|
2 gimple-ssa-warn-restrict.c:814
|
|
|
3 Test to verify that a pointer offset range whose upper bound is less
|
|
|
4 than its lower bound (when interpreted as a signed integer) is handled
|
|
|
5 correctly.
|
|
|
6 { dg-do compile }
|
|
|
7 { dg-options "-O2 -Wrestrict" } */
|
|
|
8
|
|
|
9 #include "range.h"
|
|
|
10
|
|
|
11 extern char* strcpy (char*, const char*);
|
|
|
12 extern char* stpcpy (char*, const char*);
|
|
|
13
|
|
|
14 void sink (void*);
|
|
|
15
|
|
|
16 void warn_2_smax_p2 (void)
|
|
|
17 {
|
|
|
18 char a[7] = "01234";
|
|
|
19
|
|
|
20 char *d = a;
|
|
|
21
|
|
|
22 ptrdiff_t i = UR (2, DIFF_MAX + (size_t)2);
|
|
|
23
|
|
|
24 strcpy (d, d + i); /* { dg-warning "accessing between 0 and 4 bytes at offsets 0 and \\\[2, 7] may overlap up to 2 bytes at offset 2" } */
|
|
|
25
|
|
|
26 sink (d);
|
|
|
27 }
|
|
|
28
|
|
|
29 void nowarn_3_smax_p2 (void)
|
|
|
30 {
|
|
|
31 char a[7] = "12345";
|
|
|
32
|
|
|
33 char *d = a;
|
|
|
34
|
|
|
35 ptrdiff_t i = UR (3, DIFF_MAX + (size_t)2);
|
|
|
36
|
|
|
37 strcpy (d, d + i);
|
|
|
38
|
|
|
39 sink (d);
|
|
|
40 }
|
|
|
41
|
|
|
42 void warn_2u_smax_p2 (void)
|
|
|
43 {
|
|
|
44 char a[7] = "23456";
|
|
|
45
|
|
|
46 char *d = a;
|
|
|
47
|
|
|
48 size_t i = UR (2, DIFF_MAX + (size_t)2);
|
|
|
49
|
|
|
50 strcpy (d, d + i); /* { dg-warning "accessing between 0 and 4 bytes at offsets 0 and \\\[2, 7] may overlap up to 2 bytes at offset 2" } */
|
|
|
51
|
|
|
52 sink (d);
|
|
|
53 }
|
|
|
54
|
|
|
55 void nowarn_3u_smax_p2 (void)
|
|
|
56 {
|
|
|
57 char a[7] = "34567";
|
|
|
58
|
|
|
59 char *d = a;
|
|
|
60
|
|
|
61 size_t i = UR (3, DIFF_MAX + (size_t)2);
|
|
|
62
|
|
|
63 strcpy (d, d + i);
|
|
|
64
|
|
|
65 sink (d);
|
|
|
66 }
|
