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 fn(void)57fn (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 } 65