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bd909071 JJ |
1 | /* PR tree-optimization/97053 */ |
2 | /* { dg-do run } */ | |
3 | /* { dg-options "-O2 -fno-tree-dse" } */ | |
4 | ||
5 | struct __attribute__((packed, may_alias)) S { long long s; }; | |
6 | struct __attribute__((packed, may_alias)) T { short t; }; | |
7 | ||
8 | __attribute__((noipa)) void | |
9 | test (char *p, char *q, int s) | |
10 | { | |
11 | if ((s & 1) == 0) | |
12 | { | |
13 | if (*(short __attribute__((may_alias)) *) &p[sizeof (short)] | |
14 | != *(short __attribute__((may_alias)) *) &q[sizeof (short)] | |
15 | || (((struct S __attribute__((may_alias)) *) &p[1])->s | |
16 | != ((struct S __attribute__((may_alias)) *) &q[1])->s) | |
17 | || (*(short __attribute__((may_alias)) *) &p[2 * sizeof (short)] | |
18 | != *(short __attribute__((may_alias)) *) &q[2 * sizeof (short)])) | |
19 | __builtin_abort (); | |
20 | } | |
21 | else | |
22 | { | |
23 | if (*(short __attribute__((may_alias)) *) &p[sizeof (short)] | |
24 | != *(short __attribute__((may_alias)) *) &q[sizeof (short)] | |
25 | || (((struct S __attribute__((may_alias)) *) &p[1])->s | |
26 | != ((struct S __attribute__((may_alias)) *) &q[1])->s) | |
27 | || (((struct T __attribute__((may_alias)) *) &p[2 * sizeof (short) - 1])->t | |
28 | != ((struct T __attribute__((may_alias)) *) &q[2 * sizeof (short) - 1])->t) | |
29 | || p[3 * sizeof (short) - 2] != q[3 * sizeof (short) - 2]) | |
30 | __builtin_abort (); | |
31 | } | |
32 | } | |
33 | ||
34 | __attribute__((noipa)) void | |
35 | foo (long long *p, char *q, char *r, char *s) | |
36 | { | |
37 | char a[64] __attribute__((aligned (__alignof (short)))); | |
38 | *(short __attribute__((may_alias)) *) &a[sizeof (short)] = 1; | |
39 | ((struct S __attribute__((may_alias)) *) &a[1])->s = p[0]; | |
40 | *(short __attribute__((may_alias)) *) &a[2 * sizeof (short)] = 2; | |
41 | *(short __attribute__((may_alias)) *) &q[sizeof (short)] = 1; | |
42 | ((struct S __attribute__((may_alias)) *) &r[1])->s = p[0]; | |
43 | *(short __attribute__((may_alias)) *) &s[2 * sizeof (short)] = 2; | |
44 | test (a, q, 0); | |
45 | } | |
46 | ||
47 | __attribute__((noipa)) void | |
48 | bar (long long *p, char *q, char *r, char *s, char *t) | |
49 | { | |
50 | char a[64] __attribute__((aligned (__alignof (short)))); | |
51 | *(short __attribute__((may_alias)) *) &a[sizeof (short)] = 1; | |
52 | ((struct S __attribute__((may_alias)) *) &a[1])->s = p[0]; | |
53 | ((struct T __attribute__((may_alias)) *) &a[2 * sizeof (short) - 1])->t = 2; | |
54 | a[3 * sizeof (short) - 2] = 3; | |
55 | *(short __attribute__((may_alias)) *) &q[sizeof (short)] = 1; | |
56 | ((struct S __attribute__((may_alias)) *) &r[1])->s = p[0]; | |
57 | ((struct T __attribute__((may_alias)) *) &s[2 * sizeof (short) - 1])->t = 2; | |
58 | t[3 * sizeof (short) - 2] = 3; | |
59 | test (a, q, 1); | |
60 | } | |
61 | ||
62 | __attribute__((noipa)) void | |
63 | baz (long long *p, char *q, char *r, char *s) | |
64 | { | |
65 | char a[64] __attribute__((aligned (__alignof (short)))); | |
66 | *(short __attribute__((may_alias)) *) &a[2 * sizeof (short)] = 2; | |
67 | ((struct S __attribute__((may_alias)) *) &a[1])->s = p[0]; | |
68 | *(short __attribute__((may_alias)) *) &a[sizeof (short)] = 1; | |
69 | *(short __attribute__((may_alias)) *) &q[2 * sizeof (short)] = 2; | |
70 | ((struct S __attribute__((may_alias)) *) &r[1])->s = p[0]; | |
71 | *(short __attribute__((may_alias)) *) &s[sizeof (short)] = 1; | |
72 | test (a, q, 2); | |
73 | } | |
74 | ||
75 | __attribute__((noipa)) void | |
76 | qux (long long *p, char *q, char *r, char *s, char *t) | |
77 | { | |
78 | char a[64] __attribute__((aligned (__alignof (short)))); | |
79 | *(short __attribute__((may_alias)) *) &a[2 * sizeof (short) - 1] = 2; | |
80 | ((struct S __attribute__((may_alias)) *) &a[1])->s = p[0]; | |
81 | a[3 * sizeof (short) - 2] = 3; | |
82 | *(short __attribute__((may_alias)) *) &a[sizeof (short)] = 1; | |
83 | ((struct T __attribute__((may_alias)) *) &q[2 * sizeof (short) - 1])->t = 2; | |
84 | ((struct S __attribute__((may_alias)) *) &r[1])->s = p[0]; | |
85 | s[3 * sizeof (short) - 2] = 3; | |
86 | ((struct T __attribute__((may_alias)) *) &t[sizeof (short)])->t = 1; | |
87 | test (a, q, 3); | |
88 | } | |
89 | ||
90 | __attribute__((noipa)) void | |
91 | corge (long long *p, char *q, char *r, char *s, short u[3]) | |
92 | { | |
93 | char a[64] __attribute__((aligned (__alignof (short)))); | |
94 | *(short __attribute__((may_alias)) *) &a[2 * sizeof (short)] = u[2]; | |
95 | ((struct S __attribute__((may_alias)) *) &a[1])->s = p[0]; | |
96 | *(short __attribute__((may_alias)) *) &a[sizeof (short)] = u[1]; | |
97 | *(short __attribute__((may_alias)) *) &q[2 * sizeof (short)] = u[2]; | |
98 | ((struct S __attribute__((may_alias)) *) &r[1])->s = p[0]; | |
99 | *(short __attribute__((may_alias)) *) &s[sizeof (short)] = u[1]; | |
100 | test (a, q, 4); | |
101 | } | |
102 | ||
103 | __attribute__((noipa)) void | |
104 | garply (long long *p, char *q, char *r, char *s, short u[3]) | |
105 | { | |
106 | char a[64] __attribute__((aligned (__alignof (short)))); | |
107 | *(short __attribute__((may_alias)) *) &a[sizeof (short)] = u[1]; | |
108 | ((struct S __attribute__((may_alias)) *) &a[1])->s = p[0]; | |
109 | *(short __attribute__((may_alias)) *) &a[2 * sizeof (short)] = u[2]; | |
110 | *(short __attribute__((may_alias)) *) &s[sizeof (short)] = u[1]; | |
111 | ((struct S __attribute__((may_alias)) *) &r[1])->s = p[0]; | |
112 | *(short __attribute__((may_alias)) *) &q[2 * sizeof (short)] = u[2]; | |
113 | test (a, q, 6); | |
114 | } | |
115 | ||
116 | int | |
117 | main () | |
118 | { | |
119 | char a[64] __attribute__((aligned (__alignof (short)))); | |
120 | long long p = -1LL; | |
121 | short u[] = { 1, 2, 3 }; | |
122 | foo (&p, &a[0], &a[0], &a[0]); | |
123 | bar (&p, &a[0], &a[0], &a[0], &a[0]); | |
124 | baz (&p, &a[0], &a[0], &a[0]); | |
125 | qux (&p, &a[0], &a[0], &a[0], &a[0]); | |
126 | corge (&p, &a[0], &a[0], &a[0], u); | |
127 | garply (&p, &a[0], &a[0], &a[0], u); | |
128 | return 0; | |
129 | } |