0241637c0e
Converting a _Complex type to a real one simply discards the imaginary part. This can easily lead to loss of information so for safety (and GCC compatibility) this patch disallows that when the conversion would be implicit. The one exception is bool, which actually compares both real and imaginary parts and so is safe. llvm-svn: 310427
172 lines
8.1 KiB
C++
172 lines
8.1 KiB
C++
// RUN: %clang_cc1 %s -verify -fsyntax-only -std=gnu++98 -triple x86_64-pc-linux-gnu
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typedef unsigned long long uint64_t;
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typedef unsigned int uint32_t;
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// Check integer sizes.
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int array64[sizeof(uint64_t) == 8 ? 1 : -1];
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int array32[sizeof(uint32_t) == 4 ? 1 : -1];
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int arrayint[sizeof(int) < sizeof(uint64_t) ? 1 : -1];
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uint64_t f0(uint64_t);
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uint64_t f1(uint64_t, uint32_t);
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uint64_t f2(uint64_t, ...);
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static const uint64_t overflow = 1 * 4608 * 1024 * 1024; // expected-warning {{overflow in expression; result is 536870912 with type 'int'}}
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uint64_t check_integer_overflows(int i) { //expected-note {{declared here}}
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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uint64_t overflow = 4608 * 1024 * 1024,
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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overflow2 = (uint64_t)(4608 * 1024 * 1024),
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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overflow3 = (uint64_t)(4608 * 1024 * 1024 * i),
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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overflow4 = (1ULL * ((4608) * ((1024) * (1024))) + 2ULL),
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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overflow5 = static_cast<uint64_t>(4608 * 1024 * 1024),
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// expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
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multi_overflow = (uint64_t)((uint64_t)(4608 * 1024 * 1024) * (uint64_t)(4608 * 1024 * 1024));
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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overflow += overflow2 = overflow3 = (uint64_t)(4608 * 1024 * 1024);
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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overflow += overflow2 = overflow3 = 4608 * 1024 * 1024;
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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overflow += overflow2 = overflow3 = static_cast<uint64_t>(4608 * 1024 * 1024);
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uint64_t not_overflow = 4608 * 1024 * 1024ULL;
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uint64_t not_overflow2 = (1ULL * ((uint64_t)(4608) * (1024 * 1024)) + 2ULL);
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// expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
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overflow = 4608 * 1024 * 1024 ? 4608 * 1024 * 1024 : 0;
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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overflow = 0 ? 0 : 4608 * 1024 * 1024;
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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if (4608 * 1024 * 1024)
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return 0;
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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if ((uint64_t)(4608 * 1024 * 1024))
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return 1;
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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if (static_cast<uint64_t>(4608 * 1024 * 1024))
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return 1;
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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if ((uint64_t)(4608 * 1024 * 1024))
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return 2;
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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if ((uint64_t)(4608 * 1024 * 1024 * i))
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return 3;
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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if ((1ULL * ((4608) * ((1024) * (1024))) + 2ULL))
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return 4;
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// expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
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if ((uint64_t)((uint64_t)(4608 * 1024 * 1024) * (uint64_t)(4608 * 1024 * 1024)))
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return 5;
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switch (i) {
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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case 4608 * 1024 * 1024:
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return 6;
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// expected-warning@+1 {{overflow in expression; result is 537919488 with type 'int'}}
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case (uint64_t)(4609 * 1024 * 1024):
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return 7;
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// expected-warning@+1 {{overflow in expression; result is 537919488 with type 'int'}}
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case 1 + static_cast<uint64_t>(4609 * 1024 * 1024):
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return 7;
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// expected-error@+2 {{expression is not an integral constant expression}}
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// expected-note@+1 {{read of non-const variable 'i' is not allowed in a constant expression}}
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case ((uint64_t)(4608 * 1024 * 1024 * i)):
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return 8;
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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case ((1ULL * ((4608) * ((1024) * (1024))) + 2ULL)):
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return 9;
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// expected-warning@+2 2{{overflow in expression; result is 536870912 with type 'int'}}
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// expected-warning@+1 {{overflow converting case value to switch condition type (288230376151711744 to 0)}}
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case ((uint64_t)((uint64_t)(4608 * 1024 * 1024) * (uint64_t)(4608 * 1024 * 1024))):
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return 10;
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}
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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while (4608 * 1024 * 1024);
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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while ((uint64_t)(4608 * 1024 * 1024));
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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while (static_cast<uint64_t>(4608 * 1024 * 1024));
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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while ((uint64_t)(4608 * 1024 * 1024));
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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while ((uint64_t)(4608 * 1024 * 1024 * i));
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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while ((1ULL * ((4608) * ((1024) * (1024))) + 2ULL));
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// expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
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while ((uint64_t)((uint64_t)(4608 * 1024 * 1024) * (uint64_t)(4608 * 1024 * 1024)));
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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do { } while (4608 * 1024 * 1024);
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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do { } while ((uint64_t)(4608 * 1024 * 1024));
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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do { } while (static_cast<uint64_t>(4608 * 1024 * 1024));
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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do { } while ((uint64_t)(4608 * 1024 * 1024));
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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do { } while ((uint64_t)(4608 * 1024 * 1024 * i));
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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do { } while ((1ULL * ((4608) * ((1024) * (1024))) + 2ULL));
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// expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
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do { } while ((uint64_t)((uint64_t)(4608 * 1024 * 1024) * (uint64_t)(4608 * 1024 * 1024)));
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// expected-warning@+3 {{overflow in expression; result is 536870912 with type 'int'}}
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// expected-warning@+3 {{overflow in expression; result is 536870912 with type 'int'}}
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// expected-warning@+3 {{overflow in expression; result is 536870912 with type 'int'}}
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for (uint64_t i = 4608 * 1024 * 1024;
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(uint64_t)(4608 * 1024 * 1024);
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i += (uint64_t)(4608 * 1024 * 1024 * i));
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// expected-warning@+3 {{overflow in expression; result is 536870912 with type 'int'}}
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// expected-warning@+3 2{{overflow in expression; result is 536870912 with type 'int'}}
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// expected-warning@+3 2{{overflow in expression; result is 536870912 with type 'int'}}
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for (uint64_t i = (1ULL * ((4608) * ((1024) * (1024))) + 2ULL);
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((uint64_t)((uint64_t)(4608 * 1024 * 1024) * (uint64_t)(4608 * 1024 * 1024)));
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i = ((4608 * 1024 * 1024) + ((uint64_t)(4608 * 1024 * 1024))));
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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_Complex long long x = 4608 * 1024 * 1024;
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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(__real__ x) = 4608 * 1024 * 1024;
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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(__imag__ x) = 4608 * 1024 * 1024;
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// expected-warning@+4 {{overflow in expression; result is 536870912 with type 'int'}}
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// expected-warning@+3 {{array index 536870912 is past the end of the array (which contains 10 elements)}}
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// expected-note@+1 {{array 'a' declared here}}
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uint64_t a[10];
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a[4608 * 1024 * 1024] = 1;
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// expected-warning@+1 2{{overflow in expression; result is 536870912 with type 'int'}}
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return ((4608 * 1024 * 1024) + ((uint64_t)(4608 * 1024 * 1024)));
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}
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