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/* { dg-do compile } */
/* { dg-options "-O1 -foptimize-sibling-calls -fdump-tree-tailr1-details" } */
int
t(int a)
{
int r;
if (a&1)
r = t(a-1);
else if (a)
r = t(a-2);
else
return 0;
if (r)
r=r;
return r;
}
/* { dg-final { scan-tree-dump-times "Eliminated tail recursion" 2 "tailr1"} } */
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