i-c-e.c revision e1eed38733ed47d44f9d8c7731817c411eaf4141 
1// RUN: %clang %s -ffreestanding -fsyntax-only -Xclang -verify -pedantic -fpascal-strings -std=c99
2
3#include <stdint.h>
4#include <limits.h>
5
6int a() {int p; *(1 ? &p : (void*)(0 && (a(),1))) = 10;} // expected-error {{incomplete type 'void' is not assignable}}
7
8// rdar://6091492 - ?: with __builtin_constant_p as the operand is an i-c-e.
9int expr;
10char w[__builtin_constant_p(expr) ? expr : 1];
11
12char v[sizeof(__builtin_constant_p(0)) == sizeof(int) ? 1 : -1];
13
14// __builtin_constant_p as the condition of ?: allows arbitrary foldable
15// constants to be transmogrified into i-c-e's.
16char b[__builtin_constant_p((int)(1.0+2.0)) ? (int)(1.0+2.0) : -1];
17
18struct c {
19  int a : (  // expected-error {{expression is not an integer constant expression}}
20           __builtin_constant_p((int)(1.0+2.0)) ? (int)(1.0+
21     expr  // expected-note {{subexpression not valid in an integer constant expression}}
22           ) : -1);
23};
24
25
26
27
28void test1(int n, int* p) { *(n ? p : (void *)(7-7)) = 1; }
29void test2(int n, int* p) { *(n ? p : (void *)0) = 1; }
30
31
32
33char array[1024/(sizeof (long))];
34
35int x['\xBb' == (char) 187 ? 1: -1];
36
37// PR1992
38void func(int x)
39{
40  switch (x) {
41    case sizeof("abc"): break;
42    case sizeof("loooong"): func(4);
43    case sizeof("\ploooong"): func(4);
44  }
45}
46
47
48// rdar://4213768
49int expr;
50char y[__builtin_constant_p(expr) ? -1 : 1];
51char z[__builtin_constant_p(4) ? 1 : -1];
52
53// Comma tests
54int comma1[0?1,2:3];  // expected-warning {{expression result unused}}
55int comma2[1||(1,2)]; // expected-warning {{expression result unused}} \
56                      // expected-warning {{use of logical || with constant operand}}
57int comma3[(1,2)]; // expected-warning {{size of static array must be an integer constant expression}} \
58					// expected-warning {{expression result unused}}
59
60// Pointer + __builtin_constant_p
61char pbcp[__builtin_constant_p(4) ? (intptr_t)&expr : 0]; // expected-error {{variable length array declaration not allowed at file scope}}
62
63int illegaldiv1a[1 || 1/0];  // expected-warning {{division by zero is undefined}}
64int illegaldiv1b[1 && 1/0];  // expected-warning {{division by zero is undefined}} expected-error{{variable length array declaration not allowed at file scope}}
65
66int illegaldiv2[1/0]; // expected-error {{variable length array declaration not allowed at file scope}} \
67                      // expected-warning {{division by zero is undefined}}
68int illegaldiv3[INT_MIN / -1]; // expected-error {{variable length array declaration not allowed at file scope}}
69// PR9262
70int illegaldiv4[0 / (1 / 0)]; // expected-warning {{division by zero is undefined}} expected-error {{variable length array declaration not allowed at file scope}}
71
72int chooseexpr[__builtin_choose_expr(1, 1, expr)];
73int realop[(__real__ 4) == 4 ? 1 : -1];
74int imagop[(__imag__ 4) == 0 ? 1 : -1];
75