blob: 97e9ce47bc8959de37f3dfa83ad530aca6de2f77 (
plain)
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
|
/* PR middle-end/92323 - bogus -Warray-bounds after unrolling despite
__builtin_unreachable
{ dg-do compile }
{ dg-options "-O2 -Wall" } */
struct S { int a[5]; } s;
void sink (void*);
#pragma GCC optimize "2"
void f_O2 (unsigned n, struct S *p)
{
for (unsigned i = 1; i < n - 1; ++i)
s.a[i - 1] = p->a[i]; // { dg-bogus "\\\[-Warray-bounds" }
if (n < 4 || n > 5)
__builtin_unreachable ();
}
void g_O2 (unsigned n, struct S *p)
{
if (n < 4 || n > 5)
__builtin_unreachable ();
for (unsigned i = 1; i < n - 1; ++i)
s.a[i - 1] = p->a[i];
}
// Also exercise -O3 with loop unrolling for good measure.
#pragma GCC optimize "3"
struct T { int a[6]; } t;
void f_O3 (unsigned n, struct T *p)
{
for (unsigned i = 1; i < n - 1; ++i)
t.a[i - 1] = p->a[i]; // { dg-bogus "\\\[-Warray-bounds" }
if (n < 5 || n > 6)
__builtin_unreachable ();
}
void g_O3 (unsigned n, struct T *p)
{
if (n < 5 || n > 6)
__builtin_unreachable ();
for (unsigned i = 1; i < n - 1; ++i)
s.a[i - 1] = p->a[i];
}
|
