gcc/testsuite/c-c++-common/Wshift-count-overflow-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wshift-count-overflow" } */
   3
   4 void foo()
   5 {
   6   unsigned i1 = 1U << (sizeof(unsigned) * __CHAR_BIT__); /* { dg-warning "20:left shift count >= width of type" } */
   7   unsigned i2 = 1U >> (sizeof(unsigned) * __CHAR_BIT__); /* { dg-warning "20:right shift count >= width of type" } */
   8 }