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re PR tree-optimization/33291 (a+=2; a+=2 not simplified to a+=4; with -O3 ...
[gcc.git]
/
gcc
/
testsuite
/
gcc.dg
/
tree-ssa
/
ssa-ccp-12.c
1
/* { dg-do run } */
2
/* { dg-options "-O2" } */
3
4
struct
A
5
{
6
int
a
;
7
int
b
;
8
};
9
10
struct
A a
;
11
const int
B
=
42
;
12
13
void
foo
(
int
i
)
14
{
15
if
(
i
>
10
)
16
a
.
a
=
42
;
17
else
18
{
19
a
.
b
=
21
;
20
a
.
a
=
a
.
b
+
21
;
21
}
22
23
/* This should be folded to 'if (0)' as a.a and B are both 42. */
24
if
(
a
.
a
!=
B
)
25
link_error
();
26
}
27
28
main
()
29
{
30
foo
(
3
);
31
return
0
;
32
}