1 /* { dg-do compile } */
2 /* { dg-options "-O2 -fsplit-paths -fdump-tree-dom3-details" } */
3 
4 /* There should be two references to bufferstep that turn into
5    constants.  */
6 /* { dg-final { scan-tree-dump-times "Replaced .bufferstep_\[0-9\]+. with constant .0." 1 "dom3"} } */
7 /* { dg-final { scan-tree-dump-times "Replaced .bufferstep_\[0-9\]+. with constant .1." 1 "dom3"} } */
8 
9 /* And some assignments ought to fold down to constants.  */
10 /* { dg-final { scan-tree-dump-times "Folded to: _\[0-9\]+ = 1;" 1 "dom3"} } */
11 /* { dg-final { scan-tree-dump-times "Folded to: _\[0-9\]+ = 0;" 1 "dom3"} } */
12 
13 /* The XOR operations should have been optimized to constants.  */
14 /* { dg-final { scan-tree-dump-not "bit_xor" "dom3"} } */
15 
16 
17 extern int *stepsizeTable;
18 
19 void
adpcm_coder(signed char * outdata,int len)20 adpcm_coder (signed char *outdata, int len)
21 {
22   signed char *outp;
23   int delta;
24   int outputbuffer;
25   int bufferstep = 0;
26   outp = (signed char *) outdata;
27   int step = 0;
28   int index = 0;
29   int diff = 0;
30   for (; len > 0; len--)
31     {
32       delta = 0;
33       if (diff >= step)
34 	delta = 4;
35       step = stepsizeTable[index];
36       if (bufferstep)
37 	outputbuffer = (delta << 4) & 0xf0;
38       else
39 	*outp++ = (delta & 0x0f) | outputbuffer;
40       bufferstep = !bufferstep;
41     }
42 }
43