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111
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1 /* PR tree-optimization/27285 */
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2 /* PR tree-optimization/45122 */
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3
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4 /* { dg-do run } */
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131
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5 /* { dg-options "-O2" } */
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111
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6
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7 extern void abort (void);
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8
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9 struct S { unsigned char a, b, c, d[16]; };
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10
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11 void __attribute__ ((noinline))
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12 foo (struct S *x, struct S *y)
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13 {
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14 int a, b;
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15 unsigned char c, *d, *e;
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16
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17 b = x->b;
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18 d = x->d;
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19 e = y->d;
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20 a = 0;
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21 while (b)
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22 {
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23 if (b >= 8)
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24 {
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25 c = 0xff;
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26 b -= 8;
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27 }
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28 else
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29 {
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30 c = 0xff << (8 - b);
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31 b = 0;
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32 }
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33
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34 e[a] = d[a] & c;
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35 a++;
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36 }
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37 }
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38
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39 int
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40 main (void)
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41 {
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42 struct S x = { 0, 25, 0, { 0xaa, 0xbb, 0xcc, 0xdd }};
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43 struct S y = { 0, 0, 0, { 0 }};
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44
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45 foo (&x, &y);
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46 if (x.d[0] != y.d[0] || x.d[1] != y.d[1]
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47 || x.d[2] != y.d[2] || (x.d[3] & 0x80) != y.d[3])
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48 abort ();
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49 return 0;
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50 }
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