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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
/
pr15349.c
1
/* PR 15349. Merge two PHI nodes. */
2
/* { dg-do compile } */
3
/* { dg-options "-O1 -fdump-tree-mergephi" } */
4
5
int
6
foo
(
int
a
,
int
b
)
7
{
8
int
t
;
9
10
if
(
b
)
11
{
12
if
(
a
)
13
t
=
3
;
14
else
15
t
=
5
;
16
17
a
=
0
;
18
}
19
else
20
t
=
7
;
21
22
return
t
;
23
}
24
25
/* { dg-final { scan-tree-dump-times "PHI" 1 "mergephi2"} } */
26
/* { dg-final { cleanup-tree-dump "mergephi\[1-2\]" } } */