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111
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1 /* { dg-do compile } */
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2 /* { dg-options "-O2 -fsplit-paths -fdump-tree-dom3-details" } */
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3
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4 /* There should be two references to bufferstep that turn into
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5 constants. */
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6 /* { dg-final { scan-tree-dump-times "Replaced .bufferstep_\[0-9\]+. with constant .0." 1 "dom3"} } */
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7 /* { dg-final { scan-tree-dump-times "Replaced .bufferstep_\[0-9\]+. with constant .1." 1 "dom3"} } */
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8
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9 /* And some assignments ought to fold down to constants. */
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10 /* { dg-final { scan-tree-dump-times "Folded to: _\[0-9\]+ = 1;" 1 "dom3"} } */
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11 /* { dg-final { scan-tree-dump-times "Folded to: _\[0-9\]+ = 0;" 1 "dom3"} } */
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12
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13 /* The XOR operations should have been optimized to constants. */
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14 /* { dg-final { scan-tree-dump-not "bit_xor" "dom3"} } */
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15
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16
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17 extern int *stepsizeTable;
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18
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19 void
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20 adpcm_coder (signed char *outdata, int len)
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21 {
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22 signed char *outp;
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23 int delta;
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24 int outputbuffer;
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25 int bufferstep = 0;
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26 outp = (signed char *) outdata;
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27 int step = 0;
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28 int index = 0;
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29 int diff = 0;
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30 for (; len > 0; len--)
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31 {
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32 delta = 0;
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33 if (diff >= step)
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34 delta = 4;
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35 step = stepsizeTable[index];
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36 if (bufferstep)
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37 outputbuffer = (delta << 4) & 0xf0;
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38 else
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39 *outp++ = (delta & 0x0f) | outputbuffer;
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40 bufferstep = !bufferstep;
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41 }
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42 }
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