1  /* More sequence point warning tests  */
       2  /* { dg-do compile } */
       3  /* { dg-options "-Wsequence-point" } */
       4  
       5  struct s { struct s *nxt; int v; } q;
       6      
       7  int x[10];
       8      
       9  int foo(int *p)
      10  {
      11    int i = 0;
      12  
      13    /* Test general-lvalue sequence point warnings  */
      14    (*p) = (*p)++; /* { dg-warning "undefined" "sequence point warning" } */
      15    p[3] = p[3]++; /* { dg-warning "undefined" "sequence point warning" } */
      16    p[i] = p[i]++; /* { dg-warning "undefined" "sequence point warning" } */
      17    x[3] = x[3]++; /* { dg-warning "undefined" "sequence point warning" } */
      18    q.nxt->nxt->v = q.nxt->nxt->v++; /* { dg-warning "undefined" "sequence point warning" } */
      19  
      20    /* test expressions that appear elsewhere in the C grammar */
      21  
      22    { int a = i-i++; (void)a;} /* { dg-warning "undefined" "sequence point warning" } */
      23  
      24    if ((i-i++) != 0) /* { dg-warning "undefined" "sequence point warning" } */
      25      return i-i++; /* { dg-warning "undefined" "sequence point warning" } */
      26  
      27    for (i-i++;;)  /* { dg-warning "undefined" "sequence point warning" } */
      28      ;
      29  
      30    for (; (i-i++) != 0; )  /* { dg-warning "undefined" "sequence point warning" } */
      31      ;
      32  
      33    for (;;i-i++)  /* { dg-warning "undefined" "sequence point warning" } */
      34      ;
      35  
      36    while ((i-i++) != 0)  /* { dg-warning "undefined" "sequence point warning" } */
      37      ;
      38  
      39    do {} while ((i-i++) != 0);  /* { dg-warning "undefined" "sequence point warning" } */
      40  
      41    switch (i-i++) {  /* { dg-warning "undefined" "sequence point warning" } */
      42    case 0: return 1;
      43    }
      44  
      45    return 0;
      46  }