gcc/testsuite/gcc.dg/overflow-warn-8.c

   1 #include <limits.h>
   2
   3 /* { dg-options " -fno-trapping-math" } */
   4 void foo (int j)
   5 {
   6   int i1 = (int)(double)1.0 + INT_MAX; /* { dg-warning "integer overflow" } */
   7   int i2 = (int)(double)1 + INT_MAX; /* { dg-warning "integer overflow" } */
   8   int i3 = 1 + INT_MAX; /* { dg-warning "integer overflow" } */
   9   int i4 = +1 + INT_MAX; /* { dg-warning "integer overflow" } */
  10   int i5 = (int)((double)1.0 + INT_MAX);
  11   int i6 = (double)1.0 + INT_MAX; /* { dg-warning "overflow in conversion from .double. to .int. changes value" } */
  12   int i7 = 0 ? (int)(double)1.0 + INT_MAX : 1;
  13   int i8 = 1 ? 1 : (int)(double)1.0 + INT_MAX;
  14   int i9 = j ? (int)(double)1.0 + INT_MAX : 1; /* { dg-warning "integer overflow" } */
  15   unsigned int i10 = 0 ? (int)(double)1.0 + INT_MAX : 9U;
  16   unsigned int i11 = 1 ? 9U : (int)(double)1.0 + INT_MAX;
  17   unsigned int i12 = j ? (int)(double)1.0 + INT_MAX : 9U; /* { dg-warning "integer overflow" } */
  18   int i13 = 1 || (int)(double)1.0 + INT_MAX < 0;
  19   int i14 = 0 && (int)(double)1.0 + INT_MAX < 0;
  20   int i15 = 0 || (int)(double)1.0 + INT_MAX < 0; /* { dg-warning "integer overflow" } */
  21   int i16 = 1 && (int)(double)1.0 + INT_MAX < 0; /* { dg-warning "integer overflow" } */
  22   int i17 = j || (int)(double)1.0 + INT_MAX < 0; /* { dg-warning "integer overflow" } */
  23   int i18 = j && (int)(double)1.0 + INT_MAX < 0; /* { dg-warning "integer overflow" } */
  24 }