1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/* PR tree-optimization/78450 - strlen(s) return value can be assumed
to be less than the size of s
{ dg-do compile }
{ dg-options "-O2 -fdump-tree-optimized" } */
#include "strlenopt.h"
extern char a7[7], a6[6], a5[5], a4[4], a3[3], a2[2], a1[1];
extern char a0[0]; /* Intentionally not tested here. */
extern char ax[]; /* Same. */
struct MemArrays {
char a7[7], a6[6], a5[5], a4[4], a3[3], a2[2], a1[1];
char a0[0]; /* Not tested here. */
};
struct NestedMemArrays {
struct { char a7[7]; } ma7;
struct { char a6[6]; } ma6;
struct { char a5[5]; } ma5;
struct { char a4[4]; } ma4;
struct { char a3[3]; } ma3;
struct { char a2[2]; } ma2;
struct { char a1[1]; } ma1;
struct { char a0[0]; } ma0;
char last;
};
extern void failure_on_line (int);
#define TEST_FAIL(line) \
do { \
failure_on_line (line); \
} while (0)
#define T(expr) \
if (!(expr)) TEST_FAIL (__LINE__); else (void)0
void test_array (void)
{
T (strlen (a7) < sizeof a7);
T (strlen (a6) < sizeof a6);
T (strlen (a5) < sizeof a5);
T (strlen (a4) < sizeof a4);
T (strlen (a3) < sizeof a3);
/* The following two calls are folded too early which defeats
the strlen() optimization.
T (strlen (a2) == 1);
T (strlen (a1) == 0); */
}
void test_memarray (struct MemArrays *ma)
{
T (strlen (ma->a7) < sizeof ma->a7);
T (strlen (ma->a6) < sizeof ma->a6);
T (strlen (ma->a5) < sizeof ma->a5);
T (strlen (ma->a4) < sizeof ma->a4);
T (strlen (ma->a3) < sizeof ma->a3);
/* The following two calls are folded too early which defeats
the strlen() optimization.
T (strlen (ma->a2) == 1);
T (strlen (ma->a1) == 0); */
}
/* Verify that the range of strlen(A) of a last struct member is
set even when the array is the sole member of a struct as long
as the struct itself is a member of another struct. The converse
is tested in stlenopt-37.c. */
void test_nested_memarray (struct NestedMemArrays *ma)
{
T (strlen (ma->ma7.a7) < sizeof ma->ma7.a7);
T (strlen (ma->ma6.a6) < sizeof ma->ma6.a6);
T (strlen (ma->ma5.a5) < sizeof ma->ma5.a5);
T (strlen (ma->ma4.a4) < sizeof ma->ma4.a4);
T (strlen (ma->ma3.a3) < sizeof ma->ma3.a3);
/* The following two calls are folded too early which defeats
the strlen() optimization.
T (strlen (ma->ma2.a2) == 1);
T (strlen (ma->ma1.a1) == 0); */
}
/* { dg-final { scan-tree-dump-not "failure_on_line" "optimized" } } */
|
