1 /* { dg-do compile } */ 2 /* { dg-options "-Wshift-count-overflow" } */ 3 foo()4void 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 } 9