gcc/testsuite/gcc.dg/Wparentheses-8.c

   1 /* Test operation of -Wparentheses.  Precedence warnings.  + or - or
   2    comparison inside &.  */
   3 /* Origin: Joseph Myers <jsm@polyomino.org.uk> */
   4
   5 /* { dg-do compile } */
   6 /* { dg-options "-Wparentheses" } */
   7
   8 int foo (int);
   9
  10 int
  11 bar (int a, int b, int c)
  12 {
  13   foo (a + b & c); /* { dg-warning "parentheses" "correct warning" } */
  14   foo ((a + b) & c);
  15   foo (a + (b & c));
  16   foo (1 + 2 & c); /* { dg-warning "parentheses" "correct warning" } */
  17   foo ((1 + 2) & c);
  18   foo (1 + (2 & c));
  19   foo (1 + 2 & 3); /* { dg-warning "parentheses" "correct warning" } */
  20   foo ((1 + 2) & 3);
  21   foo (1 + (2 & 3));
  22   foo (a & b + c); /* { dg-warning "parentheses" "correct warning" } */
  23   foo ((a & b) + c);
  24   foo (a & (b + c));
  25   foo (1 & 2 + c); /* { dg-warning "parentheses" "correct warning" } */
  26   foo ((1 & 2) + c);
  27   foo (1 & (2 + c));
  28   foo (1 & 2 + 3); /* { dg-warning "parentheses" "correct warning" } */
  29   foo ((1 & 2) + 3);
  30   foo (1 & (2 + 3));
  31   foo (a - b & c); /* { dg-warning "parentheses" "correct warning" } */
  32   foo ((a - b) & c);
  33   foo (a - (b & c));
  34   foo (1 - 2 & c); /* { dg-warning "parentheses" "correct warning" } */
  35   foo ((1 - 2) & c);
  36   foo (1 - (2 & c));
  37   foo (1 - 2 & 3); /* { dg-warning "parentheses" "correct warning" } */
  38   foo ((1 - 2) & 3);
  39   foo (1 - (2 & 3));
  40   foo (a & b - c); /* { dg-warning "parentheses" "correct warning" } */
  41   foo ((a & b) - c);
  42   foo (a & (b - c));
  43   foo (1 & 2 - c); /* { dg-warning "parentheses" "correct warning" } */
  44   foo ((1 & 2) - c);
  45   foo (1 & (2 - c));
  46   foo (1 & 2 - 3); /* { dg-warning "parentheses" "correct warning" } */
  47   foo ((1 & 2) - 3);
  48   foo (1 & (2 - 3));
  49   foo (a < b & c); /* { dg-warning "parentheses" "correct warning" } */
  50   foo ((a < b) & c);
  51   foo (a < (b & c));
  52   foo (1 < 2 & c); /* { dg-warning "parentheses" "correct warning" } */
  53   foo ((1 < 2) & c);
  54   foo (1 < (2 & c));
  55   foo (1 < 2 & 3); /* { dg-warning "parentheses" "correct warning" } */
  56   foo ((1 < 2) & 3);
  57   foo (1 < (2 & 3));
  58   foo (a & b < c); /* { dg-warning "parentheses" "correct warning" } */
  59   foo ((a & b) < c);
  60   foo (a & (b < c));
  61   foo (1 & 2 < c); /* { dg-warning "parentheses" "correct warning" } */
  62   foo ((1 & 2) < c);
  63   foo (1 & (2 < c));
  64   foo (1 & 2 < 3); /* { dg-warning "parentheses" "correct warning" } */
  65   foo ((1 & 2) < 3);
  66   foo (1 & (2 < 3));
  67   foo (a == b & c); /* { dg-warning "parentheses" "correct warning" } */
  68   foo ((a == b) & c);
  69   foo (a == (b & c));
  70   foo (1 == 2 & c); /* { dg-warning "parentheses" "correct warning" } */
  71   foo ((1 == 2) & c);
  72   foo (1 == (2 & c));
  73   foo (1 == 2 & 3); /* { dg-warning "parentheses" "correct warning" } */
  74   foo ((1 == 2) & 3);
  75   foo (1 == (2 & 3));
  76   foo (a & b == c); /* { dg-warning "parentheses" "correct warning" } */
  77   foo ((a & b) == c);
  78   foo (a & (b == c));
  79   foo (1 & 2 == c); /* { dg-warning "parentheses" "correct warning" } */
  80   foo ((1 & 2) == c);
  81   foo (1 & (2 == c));
  82   foo (1 & 2 == 3); /* { dg-warning "parentheses" "correct warning" } */
  83   foo ((1 & 2) == 3);
  84   foo (1 & (2 == 3));
  85   foo (a != b & c); /* { dg-warning "parentheses" "correct warning" } */
  86   foo ((a != b) & c);
  87   foo (a != (b & c));
  88   foo (1 != 2 & c); /* { dg-warning "parentheses" "correct warning" } */
  89   foo ((1 != 2) & c);
  90   foo (1 != (2 & c));
  91   foo (1 != 2 & 3); /* { dg-warning "parentheses" "correct warning" } */
  92   foo ((1 != 2) & 3);
  93   foo (1 != (2 & 3));
  94   foo (a & b != c); /* { dg-warning "parentheses" "correct warning" } */
  95   foo ((a & b) != c);
  96   foo (a & (b != c));
  97   foo (1 & 2 != c); /* { dg-warning "parentheses" "correct warning" } */
  98   foo ((1 & 2) != c);
  99   foo (1 & (2 != c));
 100   foo (1 & 2 != 3); /* { dg-warning "parentheses" "correct warning" } */
 101   foo ((1 & 2) != 3);
 102   foo (1 & (2 != 3));
 103 }