gcc/testsuite/gcc.dg/ipa/ipa-icf-13.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-ipa-icf"  } */
   3
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6
   7 int gcd(int x, int y) __attribute__ ((pure));
   8
   9 __attribute__ ((noinline))
  10 int gcd(int x, int y)
  11 {
  12   int swap;
  13
  14   if(x <= 0 || y <= 0)
  15     return 0;
  16
  17   if(x < y)
  18     {
  19       swap = x;
  20       x = y;
  21       y = swap;
  22     }
  23
  24   while(x != y)
  25     {
  26       x = x - y;
  27
  28       if(y > x)
  29         {
  30           swap = x;
  31           x = y;
  32           y = swap;
  33         }
  34     }
  35
  36   return x;
  37 }
  38
  39 int nsd(int x, int y) __attribute__ ((pure));
  40
  41 __attribute__ ((noinline))
  42 int nsd(int x, int y)
  43 {
  44   int swap;
  45
  46   if(x <= 0 || y <= 0)
  47     return 0;
  48
  49   if(x < y)
  50     {
  51       swap = x;
  52       x = y;
  53       y = swap;
  54     }
  55
  56   while(x != y)
  57     {
  58       x = x - y;
  59
  60       if(y > x)
  61         {
  62           swap = x;
  63           x = y;
  64           y = swap;
  65         }
  66     }
  67
  68   return x;
  69 }
  70
  71 int nsd_different_result(int x, int y) __attribute__ ((pure));
  72
  73 __attribute__ ((noinline))
  74 int nsd_different_result(int x, int y)
  75 {
  76   int pes;
  77
  78   if(x <= 0 || y <= 0)
  79     return 1;
  80
  81   if(x < 10)
  82     y = 12;
  83   else if(x == 44)
  84     y = 124;
  85   else
  86     y = 1111;
  87
  88   if(x < y)
  89     {
  90       pes = x;
  91       x = y;
  92       y = pes;
  93     }
  94
  95   while(x != y)
  96     {
  97       x = x - y;
  98
  99       if(y > x)
 100         {
 101           pes = x;
 102           x = y;
 103           y = pes;
 104         }
 105     }
 106
 107   return x;
 108 }
 109
 110 int nsd_different_result2(int x, int y) __attribute__ ((pure));
 111
 112 __attribute__ ((noinline))
 113 int nsd_different_result2(int x, int y)
 114 {
 115   int pes;
 116
 117   if(x <= 0 || y <= 0)
 118     return 1;
 119
 120   if(x < 10)
 121     y = 12;
 122   else if(x == 44)
 123     y = 124;
 124   else
 125     y = 1111;
 126
 127   if(x < y)
 128     {
 129       pes = x;
 130       x = y;
 131       y = pes;
 132     }
 133
 134   while(x != y)
 135     {
 136       x = x - y;
 137
 138       if(y > x)
 139         {
 140           pes = x;
 141           x = y;
 142           y = pes;
 143         }
 144     }
 145
 146   return x;
 147 }
 148
 149 __attribute__ ((noinline))
 150 int s1(int x)
 151 {
 152   switch (x)
 153     {
 154     case 10:
 155     case 11:
 156       return 2;
 157     case 12:
 158       return 123;
 159     default:
 160       return x + 2;
 161     }
 162 }
 163
 164 __attribute__ ((noinline))
 165 int s2(int x)
 166 {
 167   switch (x)
 168     {
 169     case 10:
 170     case 11:
 171       return 2;
 172     case 12:
 173       return 123;
 174     default:
 175       return x + 2;
 176     }
 177 }
 178 int main(int argc, char **argv)
 179 {
 180   if(argc < 3)
 181     return 1;
 182
 183   int a = atoi(argv[1]);
 184   int b = atoi(argv[2]);
 185
 186   printf("Test1: %d, %d, gdc: %d\n", a, b, gcd(a, b));
 187   printf("Test2: %d, %d, gdc: %d\n", a, b, nsd(a, b));
 188 }
 189
 190 /* { dg-final { scan-ipa-dump "Semantic equality hit:s1->s2" "icf"  } } */
 191 /* { dg-final { scan-ipa-dump "Semantic equality hit:nsd_different_result->nsd_different_result2" "icf"  } } */
 192 /* { dg-final { scan-ipa-dump "Semantic equality hit:gcd->nsd" "icf"  } } */
 193 /* { dg-final { scan-ipa-dump "Equal symbols: 3" "icf"  } } */