1/* Test for constant expressions: broken optimization with const variables.  */
2/* Origin: Joseph Myers <jsm28@cam.ac.uk> */
3/* { dg-do compile } */
4/* { dg-options "-std=iso9899:1999 -O2" } */
5/* Note: not using -pedantic since the -std option alone should be enough
6   to give the correct behavior to conforming programs.  */
7
8static const int ZERO = 0;
9static const double DZERO = 0;
10
11int *a;
12int b;
13long *c;
14
15/* Assertion that n is a constant zero: so the conditional expression
16   has type 'int *' instead of 'void *'.
17*/
18#define ASSERT_NPC(n)	(b = *(1 ? a : (n)))
19/* Assertion that n is not a constant zero: so the conditional
20   expressions has type 'void *' instead of 'int *'.
21*/
22#define ASSERT_NOT_NPC(n)	(c = (1 ? a : (void *)(__SIZE_TYPE__)(n)))
23
24void
25foo (void)
26{
27  ASSERT_NPC (0);
28  ASSERT_NOT_NPC (ZERO);
29  ASSERT_NPC (0 + 0);
30  ASSERT_NOT_NPC (ZERO + 0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
31  ASSERT_NOT_NPC (ZERO + ZERO); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
32  ASSERT_NPC (+0);
33  ASSERT_NOT_NPC (+ZERO); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
34  ASSERT_NPC (-0);
35  ASSERT_NOT_NPC (-ZERO); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
36  ASSERT_NPC ((char) 0);
37  ASSERT_NOT_NPC ((char) ZERO);
38  ASSERT_NPC ((int) 0);
39  ASSERT_NOT_NPC ((int) ZERO);
40  ASSERT_NPC ((int) 0.0);
41  ASSERT_NOT_NPC ((int) DZERO);
42  ASSERT_NOT_NPC ((int) +0.0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
43  ASSERT_NOT_NPC ((int) (0.0+0.0)); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
44  ASSERT_NOT_NPC ((int) (double)0.0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
45}
46