1 /* PR tree-optimization/86204 - wrong strlen result after prior strnlen
2 { dg-do run }
3 { dg-options "-O2 -Wall -fdump-tree-optimized" } */
4
5 #include "strlenopt.h"
6
7 #define NOIPA __attribute__ ((noipa))
8
9 char a[] = "12345";
10
f0(void)11 NOIPA void f0 (void)
12 {
13 unsigned n0 = strnlen (a, 0);
14 unsigned n1 = strlen (a);
15
16 if (n0 != 0 || n1 != 5)
17 abort ();
18 }
19
f1(void)20 NOIPA void f1 (void)
21 {
22 unsigned n0 = strnlen (a, 1);
23 unsigned n1 = strlen (a);
24
25 if (n0 != 1 || n1 != 5)
26 abort ();
27 }
28
f2(void)29 NOIPA void f2 (void)
30 {
31 unsigned n0 = strnlen (a, 2);
32 unsigned n1 = strlen (a);
33
34 if (n0 != 2 || n1 != 5)
35 abort ();
36 }
37
f3(void)38 NOIPA void f3 (void)
39 {
40 unsigned n0 = strnlen (a, 3);
41 unsigned n1 = strlen (a);
42
43 if (n0 != 3 || n1 != 5)
44 abort ();
45 }
46
f4(void)47 NOIPA void f4 (void)
48 {
49 unsigned n0 = strnlen (a, 4);
50 unsigned n1 = strlen (a);
51
52 if (n0 != 4 || n1 != 5)
53 abort ();
54 }
55
f5(void)56 NOIPA void f5 (void)
57 {
58 unsigned n0 = strnlen (a, 5);
59 unsigned n1 = strlen (a);
60
61 if (n0 != 5 || n1 != 5)
62 abort ();
63 }
64
f6(void)65 NOIPA void f6 (void)
66 {
67 unsigned n0 = strnlen (a, 6);
68 unsigned n1 = strlen (a);
69
70 if (n0 != 5 || n1 != 5)
71 abort ();
72 }
73
fx(unsigned n)74 NOIPA void fx (unsigned n)
75 {
76 unsigned n0 = strnlen (a, n);
77 unsigned n1 = strlen (a);
78
79 unsigned min = n < 5 ? n : 5;
80 if (n0 != min || n1 != 5)
81 abort ();
82 }
83
g2(void)84 NOIPA void g2 (void)
85 {
86 strcpy (a, "123");
87 unsigned n0 = strnlen (a, 2);
88 unsigned n1 = strlen (a);
89
90 if (n0 != 2 || n1 != 3)
91 abort ();
92 }
93
g7(void)94 NOIPA void g7 (void)
95 {
96 strcpy (a, "123");
97 unsigned n0 = strnlen (a, 7);
98 unsigned n1 = strlen (a);
99
100 if (n0 != 3 || n1 != 3)
101 abort ();
102 }
103
gx(unsigned n)104 NOIPA void gx (unsigned n)
105 {
106 strcpy (a, "123");
107 unsigned n0 = strnlen (a, n);
108 unsigned n1 = strlen (a);
109
110 unsigned min = n < 3 ? n : 3;
111 if (n0 != min || n1 != 3)
112 abort ();
113 }
114
main(void)115 int main (void)
116 {
117 f0 ();
118 f1 ();
119 f2 ();
120 f3 ();
121 f4 ();
122 f5 ();
123 f6 ();
124 fx (2);
125 fx (7);
126
127 g2 ();
128 g7 ();
129 gx (2);
130 gx (7);
131 }
132
133
134 /* For targets like Solaris 10 that don't define strnlen(). */
135
136 NOIPA size_t
strnlen(const char * s,size_t n)137 strnlen (const char *s, size_t n)
138 {
139 size_t len = 0;
140 while (*s++ && n--)
141 ++len;
142 return len;
143 }
144
145 /* Verify that at least some of the 11 calls to strnlen have been
146 folded (this number of folded calls may need to be adjusted up
147 if the strnlen optimization improves, but it should not go down.
148 { dg-final { scan-tree-dump-times "= strnlen" 7 "optimized" } } */
149