gcc/testsuite/gcc.dg/pr9814-1.c

   1 /* PR tree-optimization/9814  */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2" } */
   4
   5 extern void abort(void);
   6
   7 int test1(int x)
   8 {
   9   if (x & 2)
  10     x |= 2;
  11   return x;
  12 }
  13
  14 int test2(int x)
  15 {
  16   if (!(x & 2))
  17     x |= 2;
  18   return x;
  19 }
  20
  21 int test3(int x)
  22 {
  23   if (x & 2)
  24     x ^= 2;
  25   return x;
  26 }
  27
  28 int test4(int x)
  29 {
  30   if (!(x & 2))
  31     x ^= 2;
  32   return x;
  33 }
  34
  35 int test5(int x)
  36 {
  37   if (x & 2)
  38     x &= ~2;
  39   return x;
  40 }
  41
  42 int test6(int x)
  43 {
  44   if (!(x & 2))
  45     x &= ~2;
  46   return x;
  47 }
  48
  49 int main()
  50 {
  51   if (test1(0) != 0)
  52     abort();
  53   if (test1(2) != 2)
  54     abort();
  55   if (test1(5) != 5)
  56     abort();
  57   if (test1(7) != 7)
  58     abort();
  59
  60   if (test2(0) != 2)
  61     abort();
  62   if (test2(2) != 2)
  63     abort();
  64   if (test2(5) != 7)
  65     abort();
  66   if (test2(7) != 7)
  67     abort();
  68
  69   if (test3(0) != 0)
  70     abort();
  71   if (test3(2) != 0)
  72     abort();
  73   if (test3(5) != 5)
  74     abort();
  75   if (test3(7) != 5)
  76     abort();
  77
  78   if (test4(0) != 2)
  79     abort();
  80   if (test4(2) != 2)
  81     abort();
  82   if (test4(5) != 7)
  83     abort();
  84   if (test4(7) != 7)
  85     abort();
  86
  87   if (test5(0) != 0)
  88     abort();
  89   if (test5(2) != 0)
  90     abort();
  91   if (test5(5) != 5)
  92     abort();
  93   if (test5(7) != 5)
  94     abort();
  95
  96   if (test6(0) != 0)
  97     abort();
  98   if (test6(2) != 2)
  99     abort();
 100   if (test6(5) != 5)
 101     abort();
 102   if (test6(7) != 7)
 103     abort();
 104
 105   return 0;
 106 }
 107