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/* Test for constant expressions: broken optimization with const variables.  */

/* Origin: Joseph Myers <jsm28@cam.ac.uk> */

/* { dg-do compile } */

/* { dg-options "-std=iso9899:1999 -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" } */

}