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comparison gcc/testsuite/gcc.dg/strlenopt-36.c @ 131:84e7813d76e9

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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
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children 1830386684a0
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111:04ced10e8804 131:84e7813d76e9
1 /* PR tree-optimization/78450 - strlen(s) return value can be assumed
2 to be less than the size of s
3 { dg-do compile }
4 { dg-options "-O2 -fdump-tree-optimized" } */
5
6 #include "strlenopt.h"
7
8 extern char a7[7], a6[6], a5[5], a4[4], a3[3], a2[2], a1[1];
9 extern char a0[0]; /* Intentionally not tested here. */
10 extern char ax[]; /* Same. */
11
12 struct MemArrays {
13 char a7[7], a6[6], a5[5], a4[4], a3[3], a2[2], a1[1];
14 char a0[0]; /* Not tested here. */
15 };
16
17 struct NestedMemArrays {
18 struct { char a7[7]; } ma7;
19 struct { char a6[6]; } ma6;
20 struct { char a5[5]; } ma5;
21 struct { char a4[4]; } ma4;
22 struct { char a3[3]; } ma3;
23 struct { char a2[2]; } ma2;
24 struct { char a1[1]; } ma1;
25 struct { char a0[0]; } ma0;
26 char last;
27 };
28
29 extern void failure_on_line (int);
30
31 #define TEST_FAIL(line) \
32 do { \
33 failure_on_line (line); \
34 } while (0)
35
36 #define T(expr) \
37 if (!(expr)) TEST_FAIL (__LINE__); else (void)0
38
39
40 void test_array (void)
41 {
42 T (strlen (a7) < sizeof a7);
43 T (strlen (a6) < sizeof a6);
44 T (strlen (a5) < sizeof a5);
45 T (strlen (a4) < sizeof a4);
46 T (strlen (a3) < sizeof a3);
47
48 /* The following two calls are folded too early which defeats
49 the strlen() optimization.
50 T (strlen (a2) == 1);
51 T (strlen (a1) == 0); */
52 }
53
54 void test_memarray (struct MemArrays *ma)
55 {
56 T (strlen (ma->a7) < sizeof ma->a7);
57 T (strlen (ma->a6) < sizeof ma->a6);
58 T (strlen (ma->a5) < sizeof ma->a5);
59 T (strlen (ma->a4) < sizeof ma->a4);
60 T (strlen (ma->a3) < sizeof ma->a3);
61
62 /* The following two calls are folded too early which defeats
63 the strlen() optimization.
64 T (strlen (ma->a2) == 1);
65 T (strlen (ma->a1) == 0); */
66 }
67
68 /* Verify that the range of strlen(A) of a last struct member is
69 set even when the array is the sole member of a struct as long
70 as the struct itself is a member of another struct. The converse
71 is tested in stlenopt-37.c. */
72 void test_nested_memarray (struct NestedMemArrays *ma)
73 {
74 T (strlen (ma->ma7.a7) < sizeof ma->ma7.a7);
75 T (strlen (ma->ma6.a6) < sizeof ma->ma6.a6);
76 T (strlen (ma->ma5.a5) < sizeof ma->ma5.a5);
77 T (strlen (ma->ma4.a4) < sizeof ma->ma4.a4);
78 T (strlen (ma->ma3.a3) < sizeof ma->ma3.a3);
79
80 /* The following two calls are folded too early which defeats
81 the strlen() optimization.
82 T (strlen (ma->ma2.a2) == 1);
83 T (strlen (ma->ma1.a1) == 0); */
84 }
85
86 /* { dg-final { scan-tree-dump-not "failure_on_line" "optimized" } } */