1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 -triple x86_64-linux-gnu %s 2 3 int n; 4 constexpr int *p = 0; 5 // expected-error@+1 {{must be initialized by a constant expression}} 6 constexpr int *k = (int *) __builtin_assume_aligned(p, 16, n = 5); 7 8 constexpr void *l = __builtin_assume_aligned(p, 16); 9 10 // expected-error@+2 {{must be initialized by a constant expression}} 11 // expected-note@+1 {{cast from 'void *' is not allowed in a constant expression}} 12 constexpr int *c = (int *) __builtin_assume_aligned(p, 16); 13 14 // expected-error@+2 {{must be initialized by a constant expression}} 15 // expected-note@+1 {{alignment of the base pointee object (4 bytes) is less than the asserted 16 bytes}} 16 constexpr void *m = __builtin_assume_aligned(&n, 16); 17 18 // expected-error@+2 {{must be initialized by a constant expression}} 19 // expected-note@+1 {{offset of the aligned pointer from the base pointee object (-2 bytes) is not a multiple of the asserted 4 bytes}} 20 constexpr void *q1 = __builtin_assume_aligned(&n, 4, 2); 21 // expected-error@+2 {{must be initialized by a constant expression}} 22 // expected-note@+1 {{offset of the aligned pointer from the base pointee object (2 bytes) is not a multiple of the asserted 4 bytes}} 23 constexpr void *q2 = __builtin_assume_aligned(&n, 4, -2); 24 constexpr void *q3 = __builtin_assume_aligned(&n, 4, 4); 25 constexpr void *q4 = __builtin_assume_aligned(&n, 4, -4); 26 27 static char ar1[6]; 28 // expected-error@+2 {{must be initialized by a constant expression}} 29 // expected-note@+1 {{alignment of the base pointee object (1 byte) is less than the asserted 16 bytes}} 30 constexpr void *r1 = __builtin_assume_aligned(&ar1[2], 16); 31 32 static char ar2[6] __attribute__((aligned(32))); 33 // expected-error@+2 {{must be initialized by a constant expression}} 34 // expected-note@+1 {{offset of the aligned pointer from the base pointee object (2 bytes) is not a multiple of the asserted 16 bytes}} 35 constexpr void *r2 = __builtin_assume_aligned(&ar2[2], 16); 36 constexpr void *r3 = __builtin_assume_aligned(&ar2[2], 16, 2); 37 // expected-error@+2 {{must be initialized by a constant expression}} 38 // expected-note@+1 {{offset of the aligned pointer from the base pointee object (1 byte) is not a multiple of the asserted 16 bytes}} 39 constexpr void *r4 = __builtin_assume_aligned(&ar2[2], 16, 1); 40 41 constexpr int* x = __builtin_constant_p((int*)0xFF) ? (int*)0xFF : (int*)0xFF; 42 // expected-error@+2 {{must be initialized by a constant expression}} 43 // expected-note@+1 {{value of the aligned pointer (255) is not a multiple of the asserted 32 bytes}} 44 constexpr void *s1 = __builtin_assume_aligned(x, 32); 45 // expected-error@+2 {{must be initialized by a constant expression}} 46 // expected-note@+1 {{value of the aligned pointer (250) is not a multiple of the asserted 32 bytes}} 47 constexpr void *s2 = __builtin_assume_aligned(x, 32, 5); 48 constexpr void *s3 = __builtin_assume_aligned(x, 32, -1); 49 50
