gcc/testsuite/gcc.dg/pr53265.c

   1 /* PR tree-optimization/53265 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -Wall" } */
   4
   5 void bar (void *);
   6 int baz (int);
   7
   8 void
   9 fn1 (void)
  10 {
  11   unsigned int a[128];
  12   int i;
  13
  14   for (i = 0; i < 128; ++i)     /* { dg-message "note: containing loop" } */
  15     a[i] = i * 0x02000001;      /* { dg-warning "invokes undefined behavior" } */
  16   bar (a);
  17 }
  18
  19 void
  20 fn2 (void)
  21 {
  22   unsigned long long a[128];
  23   int i;
  24
  25   for (i = 0; i < 128; i++)                     /* { dg-message "note: containing loop" } */
  26     a[i] = (i + 1LL) * 0x0123456789ABCDEFLL;    /* { dg-warning "invokes undefined behavior" } */
  27   bar (a);
  28 }
  29
  30 void
  31 fn3 (void)
  32 {
  33   unsigned char a[16], b[16], c[16];
  34   int i;
  35
  36   bar (b);
  37   for (i = 0; i < (int) (sizeof (a) / sizeof (a[0])); i++)      /* { dg-message "note: containing loop" } */
  38     {
  39       c[i + 8] = b[i];  /* { dg-warning "invokes undefined behavior" } */
  40       a[i + 8] = b[i + 8];
  41     }
  42   bar (a);
  43   bar (c);
  44 }
  45
  46 void
  47 fn4 (void)
  48 {
  49   unsigned int *a[32], *o, i;
  50
  51   bar (a);
  52   for (i = 0; i <= sizeof (a) / sizeof (a[0]); i++)     /* { dg-message "note: containing loop" "" { xfail *-*-* } } */
  53     {
  54       o = a[i]; /* { dg-warning "invokes undefined behavior" "" { xfail *-*-* } } */
  55       bar (o);
  56     }
  57 }
  58
  59 void
  60 fn5 (void)
  61 {
  62   unsigned short a[23940];
  63   unsigned int b[1140];
  64   int j;
  65
  66   bar (b);
  67   for (j = 0; j < 1140; j++)    /* { dg-message "note: containing loop" } */
  68     a[23940 + j - 950] = b[j];  /* { dg-warning "invokes undefined behavior" } */
  69   bar (a);
  70 }
  71
  72 void
  73 fn6 (void)
  74 {
  75   double a[4][3], b[12];
  76   int i;
  77   bar (b);
  78   for (i = 0; i < 12; i++)      /* { dg-message "note: containing loop" } */
  79     a[0][i] = b[i] / 10000.0;   /* { dg-warning "invokes undefined behavior" } */
  80   bar (a);
  81 }
  82
  83 void
  84 fn7 (void)
  85 {
  86   int a[16], b, c;
  87   bar (a);
  88   for (b = a[c = 0]; c < 16; b = a[++c])        /* { dg-warning "invokes undefined behavior" "" { xfail *-*-* } } */
  89     baz (b);
  90 }
  91
  92 /* { dg-message "note: containing loop" "" { xfail *-*-* } 88 } */
  93
  94 const void *va, *vb, *vc, *vd, *ve;
  95 const void *vf[4];
  96 void
  97 fn8 (void)
  98 {
  99   unsigned long i;
 100   vf[0] = va; vf[1] = vb; vf[2] = vc; vf[3] = vd;
 101   for (i = 0; i < (sizeof (vf) / sizeof (vf[0])); i++)
 102     if (!vf[i])
 103       vf[i] = ve;
 104 }
 105
 106 int wa, wb[53][5], wc[53][5];
 107
 108 void
 109 fn9 (void)
 110 {
 111   int i, j, k;
 112   for (i = 0; i < 53; i++)
 113     for (j = 16 / (((wa & 1) != 0) ? 8 : 4); j > 0; j--)
 114       {
 115         int d = 1;
 116         if (wb[i][j] == 0 || wc[i][1] != 0)
 117           continue;
 118         for (k = 0; k < j; k++)
 119           if (wc[i + k][1])
 120             {
 121               d = 0;
 122               break;
 123             }
 124         if (!d)
 125           continue;
 126         wc[i][j] = baz (0);
 127       }
 128 }
 129
 130 int xa[18];
 131
 132 void
 133 fn10 (void)
 134 {
 135   int i;
 136   for (i = 16; i < 32; i++)     /* { dg-message "note: containing loop" } */
 137     xa[i] = 26;                 /* { dg-warning "invokes undefined behavior" } */
 138 }
 139
 140 __attribute__((noinline)) static void
 141 fn11 (int x)
 142 {
 143   int i = 1;
 144   if (x > 1)
 145     do
 146       baz (i);
 147     while (++i != x);           /* { dg-bogus "invokes undefined behavior" } */
 148 }
 149
 150 void
 151 fn12 (void)
 152 {
 153   fn11 (1);
 154   fn11 (1);
 155   fn11 (1);
 156 }