b76219b590
The diagnostic was confusing and reporting that an array contains far more elements than it is defined to have, due to casting. For example, this code: double foo[4096]; ((char*)foo)[sizeof(foo)]; warns that the "index 32768 is past the end of the array (which contains 32768 elements)." Reviewed By: serge-sans-paille, aaron.ballman Differential Revision: https://reviews.llvm.org/D135920
211 lines
9.2 KiB
C++
211 lines
9.2 KiB
C++
// RUN: %clang_cc1 %s -verify -fsyntax-only -std=gnu++98 -triple x86_64-pc-linux-gnu
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// RUN: %clang_cc1 %s -verify -fsyntax-only -std=gnu++2a -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 0+{{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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#if __cplusplus < 201103L
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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@+1 {{expression is not an integral 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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#endif
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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@+2 {{overflow in expression; result is 536870912 with type 'int'}}
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uint64_t a[10];
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a[4608 * 1024 * 1024] = 1;
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#if __cplusplus < 201103L
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// expected-warning@-2 {{array index 536870912 is past the end of the array (that has type 'uint64_t[10]' (aka 'unsigned long long[10]'))}}
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// expected-note@-4 {{array 'a' declared here}}
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#endif
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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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void check_integer_overflows_in_function_calls() {
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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(void)f0(4608 * 1024 * 1024);
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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uint64_t x = f0(4608 * 1024 * 1024);
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// expected-warning@+2 {{overflow in expression; result is 536870912 with type 'int'}}
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uint64_t (*f0_ptr)(uint64_t) = &f0;
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(void)(*f0_ptr)(4608 * 1024 * 1024);
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// expected-warning@+1 {{overflow in expression; result is 536870912 with type 'int'}}
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(void)f2(0, f0(4608 * 1024 * 1024));
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}
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// Tests that ensure that evaluation-for-overflow of random expressions doesn't
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// crash.
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namespace EvaluationCrashes {
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namespace VirtualCallWithVbase {
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struct A {};
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struct B : virtual A {
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virtual bool f(const void *, int);
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};
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struct C : B {
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bool f(const void *, int);
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};
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int d;
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bool e(C c) {
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if (c.f(&d, d)) {}
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return true;
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}
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}
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}
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