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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
/
tailrecursion-3.c
1
/* { dg-do compile } */
2
/* { dg-options "-O1 -foptimize-sibling-calls -fdump-tree-tailr-details" } */
3
int
4
t
(
int
a
)
5
{
6
int
r
;
7
if
(
a
)
8
r
=
t
(
a
-
1
);
9
else
10
return
0
;
11
if
(
r
)
12
r
=
r
;
13
return
r
;
14
}
15
/* { dg-final { scan-tree-dump-times "Eliminated tail recursion" 1 "tailr1"} } */
16
/* { dg-final { cleanup-tree-dump "tailr\[1-2\]" } } */