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145
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1 /* { dg-do run } */
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2 /* { dg-require-effective-target noinit } */
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3 /* { dg-options "-O2" } */
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4
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5 /* This test checks that noinit data is handled correctly. */
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6
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7 extern void _start (void) __attribute__ ((noreturn));
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8 extern void abort (void) __attribute__ ((noreturn));
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9 extern void exit (int) __attribute__ ((noreturn));
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10
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11 int var_common;
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12 int var_zero = 0;
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13 int var_one = 1;
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14 int __attribute__((noinit)) var_noinit;
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15 int var_init = 2;
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16
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17 int __attribute__((noinit)) func(); /* { dg-warning "attribute only applies to variables" } */
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18 int __attribute__((section ("mysection"), noinit)) var_section1; /* { dg-warning "because it conflicts with attribute" } */
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19 int __attribute__((noinit, section ("mysection"))) var_section2; /* { dg-warning "because it conflicts with attribute" } */
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20
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21
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22 int
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23 main (void)
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24 {
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25 /* Make sure that the C startup code has correctly initialized the ordinary variables. */
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26 if (var_common != 0)
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27 abort ();
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28
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29 /* Initialized variables are not re-initialized during startup, so
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30 check their original values only during the first run of this
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31 test. */
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32 if (var_init == 2)
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33 if (var_zero != 0 || var_one != 1)
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34 abort ();
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35
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36 switch (var_init)
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37 {
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38 case 2:
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39 /* First time through - change all the values. */
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40 var_common = var_zero = var_one = var_noinit = var_init = 3;
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41 break;
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42
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43 case 3:
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44 /* Second time through - make sure that d has not been reset. */
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45 if (var_noinit != 3)
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46 abort ();
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47 exit (0);
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48
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49 default:
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50 /* Any other value for var_init is an error. */
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51 abort ();
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52 }
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53
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54 /* Simulate a processor reset by calling the C startup code. */
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55 _start ();
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56
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57 /* Should never reach here. */
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58 abort ();
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59 }
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