+
−/* PR 17880 */
+
−/* { dg-do compile } */
+
−/* { dg-options "-Wsequence-point" } */
+
−
+
−int
+
−foo (int x)
+
−{
+
−  unsigned int a;
+
−  int b;
+
−
+
−  b = (a += 5) > a;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  b = (a += 5) + a == 10;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  b = (a -= 5) > a;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  b = (a -= 5) + a == 10;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  b = a-- > a;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  b = a-- + a == 10;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  b = ++a > a;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  b = ++a + a == 10;  /* { dg-warning "undefined" "sequence point warning" } */
+
−
+
−  if ((a += 5) > a) return -1;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  if ((a += 5) + a == 10) return -1;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  if ((a -= 5) > a) return -1;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  if ((a -= 5) + a == 10) return -1;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  if (a-- > a) return -1;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  if (a-- + a == 10) return -1;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  if (++a > a) return -1;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  if (++a + a == 10) return -1;  /* { dg-warning "undefined" "sequence point warning" } */
+
−  do {} while ((a += 5) > a);  /* { dg-warning "undefined" "sequence point warning" } */
+
−  while ((a += 5) > a);  /* { dg-warning "undefined" "sequence point warning" } */
+
−  for ((a += 5) > a;;);  /* { dg-warning "undefined" "sequence point warning" } */
+
−  for (b = (a += 5) > a;;);  /* { dg-warning "undefined" "sequence point warning" } */
+
−  for (; (a += 5) > a;);  /* { dg-warning "undefined" "sequence point warning" } */
+
−  for (;; b = (a += 5) > a);  /* { dg-warning "undefined" "sequence point warning" } */
+
−  for (;; a++ + a++);  /* { dg-warning "undefined" "sequence point warning" } */
+
−  if (a) a++ - a--;    /* { dg-warning "undefined" "sequence point warning" } */
+
−  ((a +=5) > a) ? a : b; /* { dg-warning "undefined" "sequence point warning" } */
+
−  return (a++ - a--); /* { dg-warning "undefined" "sequence point warning" } */
+
−}
+
−
+
−void bar (int i)
+
−{
+
−  int a = i++ - i++; /* { dg-warning "undefined" "sequence point warning" } */
+
−} 
+
−
+
−void baz (int i)
+
−{
+
−  switch (i++ + i++)  /* { dg-warning "undefined" "sequence point warning" } */
+
−    {
+
−    case 1:
+
−      i++ - i++;  /* { dg-warning "undefined" "sequence point warning" } */
+
−    case 2:
+
−      break;
+
−    }
+
−}