gcc/testsuite/gcc.dg/Wparentheses-4.c

   1 /* Test operation of -Wparentheses.  Precedence warnings.  + or -
   2    inside shift.  */
   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 (6 - 5 << c); /* { dg-warning "parentheses" "correct warning" } */
  53   foo ((6 - 5) << c);
  54   foo (6 - (5 << c));
  55   foo (6 - 5 << 4); /* { dg-warning "parentheses" "correct warning" } */
  56   foo ((6 - 5) << 4);
  57   foo (6 - (5 << 4));
  58   foo (a << b - c); /* { dg-warning "parentheses" "correct warning" } */
  59   foo ((a << b) - c);
  60   foo (a << (b - c));
  61   foo (6 << 5 - c); /* { dg-warning "parentheses" "correct warning" } */
  62   foo ((6 << 5) - c);
  63   foo (6 << (5 - c));
  64   foo (6 << 5 - 4); /* { dg-warning "parentheses" "correct warning" } */
  65   foo ((6 << 5) - 4);
  66   foo (6 << (5 - 4));
  67   foo (a - b >> c); /* { dg-warning "parentheses" "correct warning" } */
  68   foo ((a - b) >> c);
  69   foo (a - (b >> c));
  70   foo (6 - 5 >> c); /* { dg-warning "parentheses" "correct warning" } */
  71   foo ((6 - 5) >> c);
  72   foo (6 - (5 >> c));
  73   foo (6 - 5 >> 4); /* { dg-warning "parentheses" "correct warning" } */
  74   foo ((6 - 5) >> 4);
  75   foo (6 - (5 >> 4));
  76   foo (a >> b - c); /* { dg-warning "parentheses" "correct warning" } */
  77   foo ((a >> b) - c);
  78   foo (a >> (b - c));
  79   foo (6 >> 5 - c); /* { dg-warning "parentheses" "correct warning" } */
  80   foo ((6 >> 5) - c);
  81   foo (6 >> (5 - c));
  82   foo (6 >> 5 - 4); /* { dg-warning "parentheses" "correct warning" } */
  83   foo ((6 >> 5) - 4);
  84   foo (6 >> (5 - 4));
  85 }