gcc/testsuite/gcc.dg/pr53265.c

   1 /* PR tree-optimization/53265 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O2 -Wall" } */
   4 /* { dg-require-effective-target size32plus } */
   5
   6 void bar (void *);
   7 int baz (int);
   8
   9 void
  10 fn1 (void)
  11 {
  12   unsigned int a[128];
  13   int i;
  14
  15   for (i = 0; i < 128; ++i)     /* { dg-message "note: within this loop" } */
  16     a[i] = i * 0x02000001;      /* { dg-warning "64 invokes undefined behavior" } */
  17   bar (a);
  18 }
  19
  20 void
  21 fn2 (void)
  22 {
  23   unsigned long long a[128];
  24   int i;
  25
  26   for (i = 0; i < 128; i++)                     /* { dg-message "note: within this loop" } */
  27     a[i] = (i + 1LL) * 0x0123456789ABCDEFLL;    /* { dg-warning "112 invokes undefined behavior" } */
  28   bar (a);
  29 }
  30
  31 void
  32 fn3 (void)
  33 {
  34   unsigned char a[16], b[16], c[16];
  35   int i;
  36
  37   bar (b);
  38   for (i = 0; i < (int) (sizeof (a) / sizeof (a[0])); i++)      /* { dg-message "note: within this loop" } */
  39     {
  40       c[i + 8] = b[i];  /* { dg-warning "8 invokes undefined behavior" } */
  41       a[i + 8] = b[i + 8];
  42     }
  43   bar (a);
  44   bar (c);
  45 }
  46
  47 void
  48 fn4 (void)
  49 {
  50   unsigned int *a[32], *o, i;
  51
  52   bar (a);
  53   for (i = 0; i <= sizeof (a) / sizeof (a[0]); i++)     /* { dg-message "note: within this loop" } */
  54     {
  55       o = a[i]; /* { dg-warning "32 invokes undefined behavior" } */
  56       bar (o);
  57     }
  58 }
  59
  60 void
  61 fn5 (void)
  62 {
  63   unsigned short a[23940];
  64   unsigned int b[1140];
  65   int j;
  66
  67   bar (b);
  68   for (j = 0; j < 1140; j++)    /* { dg-message "note: within this loop" } */
  69     a[23940 + j - 950] = b[j];  /* { dg-warning "950 invokes undefined behavior" } */
  70   bar (a);
  71 }
  72
  73 void
  74 fn6 (void)
  75 {
  76   double a[4][3], b[12];
  77   int i;
  78   bar (b);
  79   for (i = 0; i < 12; i++)      /* { dg-message "note: within this loop" } */
  80     a[0][i] = b[i] / 10000.0;   /* { dg-warning "3 invokes undefined behavior" } */
  81   bar (a);
  82 }
  83
  84 void
  85 fn7 (void)
  86 {
  87   int a[16], b, c;
  88   bar (a);
  89   for (b = a[c = 0]; c < 16; b = a[++c])
  90     /* { dg-warning "15 invokes undefined behavior" "" { target *-*-* } .-1 } */
  91     /* { dg-message "note: within this loop" "" { target *-*-* } .-2 } */
  92     baz (b);
  93 }
  94
  95
  96 const void *va, *vb, *vc, *vd, *ve;
  97 const void *vf[4];
  98 void
  99 fn8 (void)
 100 {
 101   unsigned long i;
 102   vf[0] = va; vf[1] = vb; vf[2] = vc; vf[3] = vd;
 103   for (i = 0; i < (sizeof (vf) / sizeof (vf[0])); i++)
 104     if (!vf[i])
 105       vf[i] = ve;
 106 }
 107
 108 int wa, wb[53][5], wc[53][5];
 109
 110 void
 111 fn9 (void)
 112 {
 113   int i, j, k;
 114   for (i = 0; i < 53; i++)
 115     for (j = 16 / (((wa & 1) != 0) ? 8 : 4); j > 0; j--)
 116       {
 117         int d = 1;
 118         if (wb[i][j] == 0 || wc[i][1] != 0)
 119           continue;
 120         for (k = 0; k < j; k++)
 121           if (wc[i + k][1])
 122             {
 123               d = 0;
 124               break;
 125             }
 126         if (!d)
 127           continue;
 128         wc[i][j] = baz (0);
 129       }
 130 }
 131
 132 int xa[18];
 133
 134 void
 135 fn10 (void)
 136 {
 137   int i;
 138   for (i = 16; i < 32; i++)     /* { dg-message "note: within this loop" } */
 139     xa[i] = 26;                 /* { dg-warning "2 invokes undefined behavior" } */
 140 }
 141
 142 __attribute__((noinline)) static void
 143 fn11 (int x)
 144 {
 145   int i = 1;
 146   if (x > 1)
 147     do
 148       baz (i);
 149     while (++i != x);           /* { dg-bogus "invokes undefined behavior" } */
 150 }
 151
 152 void
 153 fn12 (void)
 154 {
 155   fn11 (1);
 156   fn11 (1);
 157   fn11 (1);
 158 }