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

   1 /* { dg-do run } */
   2 /* { dg-options "-fdump-tree-original" } */
   3
   4 /* Check that MIN-MAX and MAX-MIN combinations are folded.  */
   5
   6 extern void abort (void);
   7
   8 #define MIN(a,b) ((a) < (b) ? (a) : (b))
   9 #define MAX(a,b) ((a) > (b) ? (a) : (b))
  10
  11 int f1(int a, int b)
  12 {
  13    return MIN (MAX (a, b), b); /* == b */
  14 }
  15
  16 int f2(int a, int b)
  17 {
  18    return MAX (MIN (a, b), b); /* == b */
  19 }
  20
  21 int f3(int a, int b)
  22 {
  23    return MIN (MAX (b, a), b); /* == b */
  24 }
  25
  26 int f4(int a, int b)
  27 {
  28    return MAX (MIN (b, a), b); /* == b */
  29 }
  30
  31
  32 int g1(int a, int b)
  33 {
  34    return MIN (a, MAX (a, b)); /* == a */
  35 }
  36
  37 int g2(int a, int b)
  38 {
  39    return MAX (a, MIN (a, b)); /* == a */
  40 }
  41
  42 int g3(int a, int b)
  43 {
  44    return MIN (a, MAX (b, a)); /* == a */
  45 }
  46
  47 int g4(int a, int b)
  48 {
  49    return MAX (a, MIN (b, a)); /* == a */
  50 }
  51
  52 int main(void)
  53 {
  54   if (f1 (1, 2) != 2)
  55     abort ();
  56
  57   if (f2 (1, 2) != 2)
  58     abort ();
  59
  60   if (f3 (1, 2) != 2)
  61     abort ();
  62
  63   if (f4 (1, 2) != 2)
  64     abort ();
  65
  66   if (g1 (1, 2) != 1)
  67     abort ();
  68
  69   if (g2 (1, 2) != 1)
  70     abort ();
  71
  72   if (g3 (1, 2) != 1)
  73     abort ();
  74
  75   if (g4 (1, 2) != 1)
  76     abort ();
  77
  78   return 0;
  79 }
  80
  81 /* { dg-final { scan-tree-dump-times "MIN_EXPR" 0 "original"} } */
  82 /* { dg-final { scan-tree-dump-times "MAX_EXPR" 0 "original"} } */
  83 /* { dg-final { cleanup-tree-dump "original" } } */