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467
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1 int printf(const char *format, ...);
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2
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312
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3 #include <alloca.h>
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17
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4
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172
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5 int asize = 100;
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6
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7 int f(int i,int j,int k,int *l);
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8 int g();
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313
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9 int f1(int i,int j,int *l,int k);
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10 int g1(int k);
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11 void f2();
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172
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12
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13 int
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14 main()
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15 {
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620
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16 int a[1] ;
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315
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17 for(asize=4;asize<64000;asize=asize*2+12) {
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18 f2(1);
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19 f2(0);
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491
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20 printf("#0019:%d %d\n",g(),f(0,1,2,a));
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21 printf("#0020:%d %d\n",g1(100),f1(0,1,a,2));
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315
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22 }
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172
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23 return 0;
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24 }
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17
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25
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26 int
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172
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27 g()
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17
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28 {
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172
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29 int k = 0,i;
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30
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655
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31 char *q = alloca(100);
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315
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32 char *p = alloca(asize<100?100:asize);
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172
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33 for(i=0;i<100;i++) p[i]=i;
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34 for(i=0;i<100;i++) k += p[i];
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655
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35 for(i=0;i<100;i++) q[i]=i;
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172
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36 return k;
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17
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37 }
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172
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38
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39 int
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40 f(int i,int j,int k,int *l)
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41 {
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42 *l = 3;
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43 if (i++ >20) return *l;
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44 return f(i,j,k,(int*)alloca(asize));
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45 }
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313
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46
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47 int
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48 g1(int k)
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49 {
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50 int i;
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51
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315
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52 char *p = ((char *)alloca(asize>100?asize:100))+k;
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313
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53 p -= k;
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54 for(i=0;i<100;i++) p[i]=i;
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55 for(i=0;i<100;i++) k += p[i];
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56 return k;
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57 }
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58
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59 int
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60 f1(int i,int j,int *l,int k)
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61 {
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491
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62 // printf("#0059:f1 &i=%x &k=%x\n",&i,&k);
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63 // printf("#0060:f1 i=%d j=%d *l=%0x k=%d\n",i,j,l,k);
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313
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64 *l = 3;
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491
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65 printf("#0062:f1 i=%d j=%d *l=%0x k=%d\n",i,j,*l,k);
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313
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66 if (i++ >20) return *l;
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67 return f1(i,j,(int*)alloca(asize),k);
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68 }
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69
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70 void
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71 f2(int k)
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72 {
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73 int *l;
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74 if (k==1)
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75 l = alloca(asize);
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76 else
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77 l = 0;
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491
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78 printf("#0075:f2: %0x %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d %d\n",
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313
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79 // l,
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80 0,
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81 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40
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82 );
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83 }
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84
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