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/* Test for constant expressions: broken optimization with const variables. */
/* Reference: ISO 9989:1990 6.5.15 */
/* Origin: Joseph Myers <jsm28@cam.ac.uk> */
/* { dg-do compile } */
/* { dg-options "-std=iso9899:1990 -O2" } */
/* Note: not using -pedantic since the -std option alone should be enough
to give the correct behavior to conforming programs. */
static const int ZERO = 0;
static const double DZERO = 0;
int *a;
int b;
long *c;
/* Assertion that n is a constant zero: so the conditional expression
has type 'int *' instead of 'void *'.
*/
#define ASSERT_NPC(n) (b = *(1 ? a : (n)))
/* Assertion that n is not a constant zero: so the conditional
expressions has type 'void *' instead of 'int *'.
*/
#define ASSERT_NOT_NPC(n) (c = (1 ? a : (void *)(__SIZE_TYPE__)(n)))
void
foo (void)
{
ASSERT_NPC (0);
ASSERT_NOT_NPC (ZERO);
ASSERT_NPC (0 + 0);
ASSERT_NOT_NPC (ZERO + 0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
ASSERT_NOT_NPC (ZERO + ZERO); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
ASSERT_NPC (+0);
ASSERT_NOT_NPC (+ZERO); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
ASSERT_NPC (-0);
ASSERT_NOT_NPC (-ZERO); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
ASSERT_NPC ((char) 0);
ASSERT_NOT_NPC ((char) ZERO);
ASSERT_NPC ((int) 0);
ASSERT_NOT_NPC ((int) ZERO);
ASSERT_NPC ((int) 0.0);
ASSERT_NOT_NPC ((int) DZERO);
ASSERT_NOT_NPC ((int) +0.0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
ASSERT_NOT_NPC ((int) (0.0+0.0)); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
ASSERT_NOT_NPC ((int) (double)0.0); /* { dg-bogus "incompatible" "bogus null pointer constant" } */
}
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