1*67e74705SXin Li // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 -triple x86_64-linux-gnu %s 2*67e74705SXin Li 3*67e74705SXin Li int n; 4*67e74705SXin Li constexpr int *p = 0; 5*67e74705SXin Li // expected-error@+1 {{must be initialized by a constant expression}} 6*67e74705SXin Li constexpr int *k = (int *) __builtin_assume_aligned(p, 16, n = 5); 7*67e74705SXin Li 8*67e74705SXin Li constexpr void *l = __builtin_assume_aligned(p, 16); 9*67e74705SXin Li 10*67e74705SXin Li // expected-error@+2 {{must be initialized by a constant expression}} 11*67e74705SXin Li // expected-note@+1 {{cast from 'void *' is not allowed in a constant expression}} 12*67e74705SXin Li constexpr int *c = (int *) __builtin_assume_aligned(p, 16); 13*67e74705SXin Li 14*67e74705SXin Li // expected-error@+2 {{must be initialized by a constant expression}} 15*67e74705SXin Li // expected-note@+1 {{alignment of the base pointee object (4 bytes) is less than the asserted 16 bytes}} 16*67e74705SXin Li constexpr void *m = __builtin_assume_aligned(&n, 16); 17*67e74705SXin Li 18*67e74705SXin Li // expected-error@+2 {{must be initialized by a constant expression}} 19*67e74705SXin Li // 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*67e74705SXin Li constexpr void *q1 = __builtin_assume_aligned(&n, 4, 2); 21*67e74705SXin Li // expected-error@+2 {{must be initialized by a constant expression}} 22*67e74705SXin Li // 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*67e74705SXin Li constexpr void *q2 = __builtin_assume_aligned(&n, 4, -2); 24*67e74705SXin Li constexpr void *q3 = __builtin_assume_aligned(&n, 4, 4); 25*67e74705SXin Li constexpr void *q4 = __builtin_assume_aligned(&n, 4, -4); 26*67e74705SXin Li 27*67e74705SXin Li static char ar1[6]; 28*67e74705SXin Li // expected-error@+2 {{must be initialized by a constant expression}} 29*67e74705SXin Li // expected-note@+1 {{alignment of the base pointee object (1 byte) is less than the asserted 16 bytes}} 30*67e74705SXin Li constexpr void *r1 = __builtin_assume_aligned(&ar1[2], 16); 31*67e74705SXin Li 32*67e74705SXin Li static char ar2[6] __attribute__((aligned(32))); 33*67e74705SXin Li // expected-error@+2 {{must be initialized by a constant expression}} 34*67e74705SXin Li // 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*67e74705SXin Li constexpr void *r2 = __builtin_assume_aligned(&ar2[2], 16); 36*67e74705SXin Li constexpr void *r3 = __builtin_assume_aligned(&ar2[2], 16, 2); 37*67e74705SXin Li // expected-error@+2 {{must be initialized by a constant expression}} 38*67e74705SXin Li // 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*67e74705SXin Li constexpr void *r4 = __builtin_assume_aligned(&ar2[2], 16, 1); 40*67e74705SXin Li 41*67e74705SXin Li constexpr int* x = __builtin_constant_p((int*)0xFF) ? (int*)0xFF : (int*)0xFF; 42*67e74705SXin Li // expected-error@+2 {{must be initialized by a constant expression}} 43*67e74705SXin Li // expected-note@+1 {{value of the aligned pointer (255) is not a multiple of the asserted 32 bytes}} 44*67e74705SXin Li constexpr void *s1 = __builtin_assume_aligned(x, 32); 45*67e74705SXin Li // expected-error@+2 {{must be initialized by a constant expression}} 46*67e74705SXin Li // expected-note@+1 {{value of the aligned pointer (250) is not a multiple of the asserted 32 bytes}} 47*67e74705SXin Li constexpr void *s2 = __builtin_assume_aligned(x, 32, 5); 48*67e74705SXin Li constexpr void *s3 = __builtin_assume_aligned(x, 32, -1); 49*67e74705SXin Li 50