gcc/testsuite/c-c++-common/Wshift-overflow-2.c

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