gcc/testsuite/c-c++-common/Wshift-overflow-5.c

   1 /* PR c++/55095 */
   2 /* { dg-do compile { target int32 } } */
   3 /* { dg-options "-O -Wshift-overflow=2" } */
   4
   5 #define INTM1 (sizeof (int) * __CHAR_BIT__ - 1)
   6 #define LLONGM1 (sizeof (long long) * __CHAR_BIT__ - 1)
   7
   8 int i1 = 1 << INTM1; /* { dg-warning "requires 33 bits to represent" "" { target { c || c++11_down } } } */
   9 unsigned u1 = 1 << INTM1; /* { dg-warning "requires 33 bits to represent" "" { target { c || c++11_down } } } */
  10 long long int l1 = 1LL << LLONGM1; /* { dg-warning "requires 65 bits to represent" "" { target { c || c++11_down } } } */