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111
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1 /* Simple check that tail recursive call optimization is also
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2 controlled by -foptimize-sibling-calls.
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3
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4 Copyright (C) 2006 Free Software Foundation Inc.
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5 Original test by Hans-Peter Nilsson <hp@bitrange.com> */
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6
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7 /* On IA64 the call frame is allocated on the register stack, not the
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8 normal stack. */
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9
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10 /* { dg-do run { target { ! "ia64-*-*" } } } */
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11 /* { dg-options "-O2 -fno-optimize-sibling-calls" } */
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12
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13
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14 extern void abort (void);
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15
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16 extern void recurser_void (int);
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17 extern void track (int);
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18
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19 int main (void)
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20 {
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21 recurser_void (0);
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22 return 0;
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23 }
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24
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25 void recurser_void (int n)
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26 {
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27 if (n == 0 || n == 7)
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28 track (n);
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29
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30 if (n == 10)
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31 return;
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32
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33 recurser_void (n + 1);
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34 }
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35
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36 void *trackpoint;
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37
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38 void track (int n)
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39 {
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40 char stackpos[1];
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41
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42 if (n == 0)
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43 trackpoint = stackpos;
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44 else if (n != 7 || trackpoint == stackpos)
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45 abort ();
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46 }
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