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111
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1 /* { dg-do run } */
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2 /* { dg-options "-O2" } */
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3 /* { dg-require-effective-target int32plus } */
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4
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5 struct tree_decl
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6 {
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7 union tree_decl_u1 {
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8 int f;
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9 long i;
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10 struct tree_decl_u1_a {
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11 unsigned int align : 24;
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12 unsigned int off_align : 8;
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13 } a;
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14 } u1;
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15 };
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16
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17 extern void abort (void);
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18
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19 unsigned int
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20 assemble_variable (struct tree_decl decl)
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21 {
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22 unsigned int align;
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23
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24 align = decl.u1.a.align;
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25
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26 if (align > (1 << ((8 * 4) < 64 ? (8 * 4) - 2 : 62)))
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27 align = (1 << ((8 * 4) < 64 ? (8 * 4) - 2 : 62));
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28
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29 /* VRP should not be propagating 0 to the RHS of this assignment.
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30 But it was erroneously applying a cast operation between types of
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31 different precision. align is an unsigned int with range [0,
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32 0x4000000] but the .align field holds only 24 bits. So the cast
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33 was returning a [0, 0] range. */
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34 decl.u1.a.align = align;
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35
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36 return decl.u1.a.align;
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37 }
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38
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39 int
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40 main ()
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41 {
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42 struct tree_decl decl;
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43 decl.u1.a.align = 13;
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44 unsigned int x = assemble_variable (decl);
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45 if (x == 0)
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46 abort ();
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47 return 0;
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48 }
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