gcc/testsuite/c-c++-common/pr48418.c

   1 /* PR c/48418 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Wall -O2" } */
   4
   5 int
   6 foo (int x)
   7 {
   8   const int a = sizeof (int) * __CHAR_BIT__;
   9   const int b = -7;
  10   int c = 0;
  11   c += x << a;                             /* { dg-warning "left shift count >= width of type" } */
  12   c += x << b;                             /* { dg-warning "left shift count is negative" } */
  13   c += x << (sizeof (int) * __CHAR_BIT__); /* { dg-warning "left shift count >= width of type" } */
  14   c += x << -7;                            /* { dg-warning "left shift count is negative" } */
  15   c += x >> a;                             /* { dg-warning "right shift count >= width of type" } */
  16   c += x >> b;                             /* { dg-warning "right shift count is negative" } */
  17   c += x >> (sizeof (int) * __CHAR_BIT__); /* { dg-warning "right shift count >= width of type" } */
  18   c += x >> -7;                            /* { dg-warning "right shift count is negative" } */
  19   return c;
  20 }