1  /* PR c++/55095 */
       2  /* { dg-do compile { target int32 } } */
       3  /* { dg-options "-O -Wshift-overflow" } */
       4  /* { dg-additional-options "-std=gnu90" { target c } } */
       5  /* { dg-additional-options "-std=c++03" { target c++ } } */
       6  
       7  #define INTM1 (sizeof (int) * __CHAR_BIT__ - 1)
       8  #define INTM2 (sizeof (int) * __CHAR_BIT__ - 2)
       9  #define LLONGM1 (sizeof (long long) * __CHAR_BIT__ - 1)
      10  #define LLONGM2 (sizeof (long long) * __CHAR_BIT__ - 2)
      11  
      12  #define INT_MIN (-__INT_MAX__-1)
      13  #define LONG_LONG_MIN (-__LONG_LONG_MAX__-1)
      14  
      15  int i1 = 1 << INTM1;
      16  int i2 = 9 << INTM1; /* { dg-warning "requires 36 bits to represent" } */
      17  int i3 = 10 << INTM2; /* { dg-warning "requires 35 bits to represent" } */
      18  int i4 = __INT_MAX__ << 2; /* { dg-warning "requires 34 bits to represent" } */
      19  int i5 = __INT_MAX__ << INTM1; /* { dg-warning "requires 63 bits to represent" } */
      20  int i6 = -1 << INTM1;
      21  int i7 = -9 << INTM1; /* { dg-warning "requires 36 bits to represent" } */
      22  int i8 = -10 << INTM2; /* { dg-warning "requires 35 bits to represent" } */
      23  int i9 = -__INT_MAX__ << 2; /* { dg-warning "requires 34 bits to represent" } */
      24  int i10 = -__INT_MAX__ << INTM1; /* { dg-warning "requires 63 bits to represent" } */
      25  int i11 = INT_MIN << 1; /* { dg-warning "requires 33 bits to represent" } */
      26  
      27  int r1 = 1 >> INTM1;
      28  int r2 = 9 >> INTM1;
      29  int r3 = 10 >> INTM2;
      30  int r4 = __INT_MAX__ >> 2;
      31  int r5 = __INT_MAX__ >> INTM1;
      32  int r6 = -1 >> INTM1;
      33  int r7 = -9 >> INTM1;
      34  int r8 = -10 >> INTM2;
      35  int r9 = -__INT_MAX__ >> 2;
      36  int r10 = -__INT_MAX__ >> INTM1;
      37  
      38  unsigned u1 = 1 << INTM1;
      39  unsigned u2 = 9 << INTM1; /* { dg-warning "requires 36 bits to represent" } */
      40  unsigned u3 = 2U << INTM1;
      41  unsigned u4 = 9U << INTM1;
      42  unsigned u5 = 10U << INTM2;
      43  
      44  long long int l1 = 1LL << LLONGM1;
      45  long long int l2 = 9LL << LLONGM1; /* { dg-warning "requires 68 bits to represent" } */
      46  long long int l3 = 10LL << LLONGM2; /* { dg-warning "requires 67 bits to represent" } */
      47  long long int l4 = __LONG_LONG_MAX__ << 2; /* { dg-warning "requires 66 bits to represent" } */
      48  long long int l5 = __LONG_LONG_MAX__ << LLONGM1; /* { dg-warning "requires 127 bits to represent" } */
      49  long long int l6 = -1LL << LLONGM1;
      50  long long int l7 = -9LL << LLONGM1; /* { dg-warning "requires 68 bits to represent" } */
      51  long long int l8 = -10LL << LLONGM2; /* { dg-warning "requires 67 bits to represent" } */
      52  long long int l9 = -__LONG_LONG_MAX__ << 2; /* { dg-warning "requires 66 bits to represent" } */
      53  long long int l10 = -__LONG_LONG_MAX__ << LLONGM1; /* { dg-warning "requires 127 bits to represent" } */
      54  long long int l11 = LONG_LONG_MIN << 1; /* { dg-warning "requires 65 bits to represent" } */
      55  
      56  void
      57  fn (void)
      58  {
      59    const int a = 10;
      60    const __SIZE_TYPE__ b = INTM1;
      61    int k1 = a << b; /* { dg-warning "requires 36 bits to represent" } */
      62    int k2 = 10 << b; /* { dg-warning "requires 36 bits to represent" } */
      63    int k3 = a << INTM1; /* { dg-warning "requires 36 bits to represent" } */
      64  }